Turning Rotors is Wrong

[@JohnCThomas24]

Machinist here : 1mm of material stock is plenty to skim depending on the flatness of face. You could remove .125mm (.005") and have a great new surface

[@mattmurphy7030]

Thank you for bringing sense back into this world. 1mm is a huge amount of material left

[@odie2763]

How else is he going to upsell you a new rotor and labor though?

[@williamiverson903]

​@@odie2763it's a lot less labor to take a new one out of it's box vs machining the old ones.

[@christophersparkman]

Totally agree. Nothing wrong with it. This guy's just padding the shop's profit margins. (Which is understandable in times like these, but it's still greedy and not cool.)

[@JohnCThomas24]

@christophersparkman the best salesman is one who's honest. May lose a purchase but you gain a contact

[@Scharpy1]

My mechanic told me, "I couldn't repair your brakes, so I made your horn louder."

[@kadmow]

New Delhi joke... No brakes left, just use horn...

[@wayneaswege9165]

Just stop 🛑 republicans learn from you to push fear and everyone, breaks. It becomes so over engineered that you’re worried about a millimeter. My life is dependent on one millimeter. I think I have bigger things to worry about like the democracy of this country

[@hyacinthbucket3803]

I put a beefier bumper.

[@billwestfield6394]

Turn up radio on a scale of 1 to 10....set it on 20.... What brake noise?

[@cjsmith1760]

​@@kadmowthat's how it's done in Mexico

[@cole5773]

As a mechanic for 15 years and my family owning the shop I work at since 1942 I’m gonna say I’m qualified to respond. I disagree Dave. I can take off less than .3mm in most cases with my Ammco brake lathe and get a new finish well within spec. We measure all rotors and if they won’t turn due to the outcome being sub spec then the customer gets new rotors. 1 mil is plenty to work with in most cases. Love the channel Dave and the content! Keep it up

[@mattmurphy7030]

Thanks for bringing sense back into the world. 1mm is huge

[@anonymike8280]

I'm with you depending on the type of rotor. My vehicle is a late 1990s-era Toyota design with 15" wheels. The rotors are vaned and have 2.0mm between maximum and minimum thickness. With your machining, I could go through as many as four cycles with a brand new rotor. I might stop at three because I have experienced pulsating with a rotor that was cut to the minimum. Dave's customers might be high-end and might be people who drive 3/4 and one ton pickups. If they're using them in their business for towing and hauling heavy loads, maybe what he's doing is prudent. If you need to ask, maybe you can't afford it.

[@joe_ferreira]

100% agree. and to the people saying they can do it with a flap disc. get off your rear and go to a auto parts store. they will all turn your rotors on a brake lathe properly. It gets you in the door looking at buying more stuff while you wait.

[@JacobKirkegaardJ]

Agreed! Dave is “over all” a very great and realistic guy but in this case he is not right. Why he says this if it is to make money or he really doesn’t agree with the specific on the rotor, that is hard to say! I would definitely slap on a new set of pads and clean the rotors on the lathe. 🙏

[@anonymike8280]

@@JacobKirkegaardJ He's dealing with a high-end customer base. They subject their vehicles with demanding use. He doesn't want complaints and bring backs. When you're grossing a thousand a day and up in your business, you pay for new rotors. If someone came for brakes on a 20-year-old intermediate or compact, he might reuse the existing rotors. That's if he took the job at all. It's an issue of marketing positioning and what the customer base is. The customers have the option of taking their trucks to some other shop.

[@Gojira_Wins]

Advice like this falls into the category of me saying "oh wow, really? That's crazy, thank you for telling me about that, I'll keep it in mind!" but turn around and immediately mentally throw it in the trash. That old rotor is perfectly fine and running old rotors with new pads will not be anywhere remotely dangerous. Telling people to buy new pads AND rotors sounds like a scammy upcharge that make people mistrust mechanics.

[@bluedistortions]

I agree, except bearing in mind his customers are buying turbos and shit. For performance boys, they do need top quality brakes because they have poor judgement. For myself, doing 55 all day long, I can run a $10 set of pads for a decade 😂

[@Will-dn9dq]

Yea pads would grind to match rotor really fast

[@Will-dn9dq]

​@@bluedistortions$10 set? Wtf you drive? Where you buy? I've watched my wrangler tj go from $20 to over $30 a set.

[@Heartbeat1991]

I wouldn’t let you anywhere near my car.

[@Gojira_Wins]

@@Heartbeat1991 That's fine, I wouldn't want to waste time on your shitbox anyway. Got better cars to work on.

[@rob_kasper_4410]

Im gonna have to disagree here. 1mm is a massive amount of metal in regards to resurfacing rotors, if you have to resurface more than .040" your doing something wrong.

[@jpol3808]

@@rob_kasper_4410 Hey Rob. You are 100% correct. No one in their right mind would remove that much material unless it was deeply grooved and they were trying to salvage it. Maybe something got lost in the wording of the comment you read because I've seen nothing saying to cut that much. Take care.

[@exiteternium]

or the custoemr turned them purple.. ( i had to take out 0.60 on honda rotors cause the lady didn't know how to drive without two feet, and every 2 weeks her rotors would be purple and blue from heat.. and yes we verified everything else worked fine and nothing was sticking on the car, hydraulics, caliper slides, caliper pistons all good, only thing stuck was her brain on stupid ways to drive)

[@Gods_Real]

He's a paid liar and at most the outter edge crust is an eight inch which you could scrape or grind off and still turn.

[@LynxStarAuto]

In my world (European cars) turning rotors is an exercise in futility. Not worth it. Those customers are very demanding, and turning a rotor just leads to a comeback... More important than arguing over whether a rotor can be resurfaced or not, is checking the straightness of the hub face, and mounting surfaces. If any of those are out of spec, you're going to be redoing a lot of brakes for free in the near future. Sadly, few shops do these checks. You're lucky if they even mic the rotor.

[@PsRohrbaugh]

Frankly it depends on the cost of the replacement rotors. I'm seeing ac Delco rotors for my car for $32 each with free shipping. Not worth rotating especially if you gotta send out. But you have something pricier, matching them can can make sense.

[@rjovidesign]

Mechanical Engineer here👋 You can absolutely, positively swap pads onto old used rotors, without issue. Rotors should outlive pads several times over in most road car applications. Always be weary of the upsell!

[@michaela2279]

idk man i use ceramics and i change rotors and pads at the same time every 75k

[@Africa1000]

I've changed pads on old rotors (discs in the UK) several times.. always had reasonable service from the pads and I didn't find that braking was unduly affected.

[@ViezePoeperd]

Yeah this video is reaching

[@jermainephillips5179]

Yeah I just change pads unless rotor is warped.never had a problem 40 yrs of driving and towing

[@Pancho-villa666]

# 1- Why not make rotor 3 mm thicker so you can service them at least once. #2- Yes you can re-use rotor without machining, they will pulsate for a while but still works . I have had rotors with grooves the size of my thumbs and drive for years without issues. just need to replace pads more often. Pads are cheaper than rotors.

[@madmatt2024]

As a mechanic, 1MM is a pretty large amount of room for cutting a rotor. It's around 40 thousandths and a typical rotor cutting only takes around 10 thousandths.

[@alantrimble2881]

And that’s my problem with the attitude put forth in this video. The decision to pad slap or not is very situational. You want me to pad slap a 1 ton truck with warped or grooved rotors that are .020” above the discard spec? Yeah, I’m not doing that. You want me to pad slap the rear of your mom’s Highlander? I’ll be happy to do that as long as the rotors are still in spec. You want me to pad slap virtually ANY Euro car made in the last 30 years? Not doing that! But “it depends on the situation” doesn’t make for a good video.

[@madmatt2024]

@@alantrimble2881 Agreed. I've pad slapped 3/4 and 1 ton trucks before but it's ones where the guy literally goes through a set of pads in a year or two and the rotors are clean with no pulsation beforehand.

[@bigbossimmotal]

I agree, I am with you. There is PLENTY of material left on that Rotor. We are talking about .75mm missing from new. That will happen in the first month, before the new pads are even broken in. He just sold them a very expensive set of new rotors for no reason. Also, we have all seen vehicles come in ground down 1/2" and were still stopping fine. It is our job to make sure they don't go OUT that way, but they do still work. Anyone that thinks that .75 mm,, of rotor thickness is the difference between 'safe' and 'unsafe', is a SALESMAN, not a mechanic.

[@PacificParadiseProductions]

@@alantrimble2881why not the euros?

[@jasonpocaro2730]

Absolutely correct 😂🎉

[@LM77va]

When i worked at Sears Automotive, we used this type of sales-jargon to turn a $90 brake job into a $400+ brake job. We're talking new hoses, rotors, pads & whatever else we could think of. Because we were also trained to say, "In my shop, we only do things the right way." It was so easy to play on "safety" concerns. I'm glad I learned to work on my own car early in life 😂

[@aaronbergeron5729]

Now 1000+ dollars!! Just in parts

[@AmericaFirst865]

That's why you lost your job. For being thief's

[@AeroEng75]

And how did that work out for you and Sears? 😂

[@Chezboi30003]

Brakes are pretty scary when you're first learning to work on your own car. What if you get it wrong and can't stop? Then you learn how to swap brake pads and see how foolproof simple it is and never worry about it again. My neighbor years ago told me he was going in for a $700 brake job on his fairly new car. Yeah, I'll take a couple hours of my Saturday and keep that money.

[@kkoch666]

Yeah, everyone creams their pants when they hear safety.

[@camcarb3]

Was going to comment a call bs but I see every other experienced, certified, mechanic with integrity already took care of it.

[@NathanaelJosiah]

This guy is the owner he says it's his shop. He probably just pays salaries or walks around with a clipboard. If this guy was a woman he'd be a blonde. No offense

[@thebeardofgaming81]

We still have people's pockets and well being at heart, believe it or not. The real ones do!

[@aku2dimensional]

I'm a certified armchair mechanic, and I have 10 years experience the field.

[@thebeardofgaming81]

@@aku2dimensional yeah, what you said!

[@jakecripe7465]

Same 😂

[@DavesintheLife-r5s]

I honestly think going one step further and just replacing the entire car is the safest approach here. Plus you get shiny new interior, win win

[@thehotdogman9317]

Remember kids, if you get a flat tire, just remember to call your local dealer and have them provide you with a new vehicle so you can get back on the road as quickly as possible.

[@DavesintheLife-r5s]

@@thehotdogman9317 haha

[@RaulRuiz-n3r]

😂👍

[@Heretic10001]

Awesome comment and right on point. The upsell is so transparent.

[@Crewsy]

Well. It is a Ram so a replacement shouldn’t even wait for for the brakes to wear out.

[@shooter7a]

Machinist here... New is 35.75mm. Worn is 35.08mm. That means that .67mm, or .026" was lost in service. Turning a rotor normally removes 020" AT MOST or .51mm. It can be less than half that.... It is all about how even the worn rotor surface is. So, 35.08-.51mm = 34.57. or .57mm for wear allowance on the next cycle. It is easily worth turning them again. Sorry but this is just bad advice.

[@mopar3502001]

I've been turning rotors for more than thirty years and can count the number of times twenty thousandths of an inch was enough to get any hubless rotor back into spec on one hand.

[@Blento0404otnelB]

In Africa they are exceeding the "recommendations" multiple times, for monetars reasons..and guess what? They are driving million more km on them with no worry... only "educated" world is having problems with perfectly good parts.

[@mopar3502001]

@@Blento0404otnelB In Africa, they probably don't have inspections where these kinds of things are looked at either.

[@seldoon_nemar]

​@@Blento0404otnelBhow often are you doing 80-90 mph? 😂 I highly doubt the road conditions are enough to get the brakes hot enough to make a difference

[@Blento0404otnelB]

@@seldoon_nemar Every day. I am doing about 1300km each week. I am driving vw passat, 4x4. Usually with 300-500kg of cargo in it. Also I am car electrician. Not working as one, but I am perfectly aware of what "law" says and what material is capable of. we are throwing millions and billions into garbage because of "safety" and "environment".

[@SleepUnderTheRain]

As if years and years of rotor resurfacing caused traffic fatalities every day. If you understand the limits of your parts, you can spend a quarter of what these yahoos recommend and still get your money's worth without sacrificing safety.

[@JohnPlissken]

Mechanical engineer, 1mm is a lot of material to remove, you should never have to resurface that deep. It would be obviously heavily pitted for it to be rusted that deep. Your brake pads will never notice a mildly rusty rotor, they are designed for use in real world conditions.

[@wilsonrawlin8547]

No offense, but there is more to this when it comes to brakes and machining rotors. I have dealt with numerous rotors with wear grooves in the 30 to 40 thousandth range and still in tolerance. Light surface rust yes. Heavy rust oxidizing into magnetite no.

[@JohnPlissken]

@@wilsonrawlin8547 that's only a problem because heavy rust turns into dust and acts as a lubricant for the pads. Resurfacing will fix it.

[@Ottonic6]

.5 mm per side. Granted, the rotor he shows is pretty bad and that one is an obvious replacement. But not all will look like that. But I figure for what it costs to turn vs a replacement, I'll spend the extra $$...

[@TucsonDude]

Lots of M/E's here, I say NEW rotors will always be better than a resurfaced one.

[@philhammond5908]

Built in obsolescence. Designed that way to sell Chinese scrap metal!

[@EngelinZivilBO]

German master mechanic here, and i call out bullshit! If there is enough Material left on the rotor (surface ok) just use new pads.. Vw said its ok, Mercedes said its ok, bmw said its totally fine.. That Gentleman only wants to sell something

[@richy69ify]

He's talking about grooves in disks . If your discs are badly grooved then your brakes are not as good

[@Wil-nh5kz]

​@@richy69ifyAlthough they might not be as good at first, as the pad wears to fit the disk (rotor to you) then the surface area of contact will be greater with a grooved disk than a flat one. Greater surface area = more braking force.

[@flyingyakdeath]

@@richy69ifyshow me an independent lab study to verify your claim

[@100brsta]

Exactly this. Just be light on the breaks for first 100 miles and pads wear in. No issue.

[@thomasmleahy6218]

I've had turned rotors replaced because the metal between the spokes on each plate collapsed causing 'humming' from a 4 corners and gradual loss of braking power. The discs are made of a metal that won't squeak, so it's softer metal.

[@EverydayWorkshop]

You have just explained how the old brake disc (rotor?) is perfectly serviceable yet you are telling your customer he needs new discs. This is why the motor trade gets such a bad name. Be honest with your customers, you don’t need to rip them off, you can still make good money just being honest. You can also see those discs are ok. You could skim them but they don’t look like they need that. Buff them up, road test the car and bed in the brakes for the customer, and if in any doubt do a brake test on your rolling road. I was in the motor trade for over 30 years and I hate the dishonesty. If the disc are worn past the safe limit or excessively corroded, yes tell the customer he has to have discs and explain truthfully why and that you will not fit just brake pads. You will then have a customers who trust you and come back year after year with repeat custom. Oh and they tell all their friends and family. Ah I feel better now 🙂

[@jeffreyplumber1975]

I generally wouldnt put pads on and not turn rotors at least nor warranty against pulsating pedal or any of that bs but id turn good rotors

[@YSongCloud]

EXACTLY!

[@auteurfiddler8706]

I am just a guy that works on his own cars. I would have just sanded the rust off the rotors in the video if they were on my car. How do you buff them up?

[@mircomuntener4643]

​@auteurfiddler8706 sanding disk or abrasive pad on some kind of rotary tool , just be very mindful you do it evenly and square so you don't make a curved or uneven face. Hit it just enough to get a fully fresh surface. One good way of doing this is to attach the rotor to the vehicle and have it idling in low gear while you hold the spin tool steady. It's janky, yes, but it works well.

[@Thinkwit]

EverydayWorkshop: I completely agree that if discs (disc brakes have discs, never heard of rotor brakes) are visibly ok, you can safely just fit new pads. If new pads are fitted to visibly ok discs, they quickly bed in and you are back to matching surfaces just as you had before, but now with full thickness pads (and minutely more surface contact area). Almost everywhere nowadays will sell you a skim or new discs. I don't believe it's (always) necessary. Don't need lots of posts telling me I'm wrong. I've replaced just pads many times (not on the same vehicle 🙂) with NO bad brake-related outcomes. Poor drivers wear pads prematurely way, way more than microscopic (and matched) grooves.

[@ScottGunMag69]

I’m a machinist since the late 80’s. It depends on the situation. 1mm is plenty of material to clean up provided the rotor isn’t warped. It would be a case by case decision as to which is economical to the customer. Shame on you Dave for a blanket policy like that.

[@nunyab2342]

Certified Master Mechanic and Instructor here: You can absolutely machine that rotor as long as it isn’t warped or have runout issues. And based on experience in several shops - some customers just don’t want the rotors but they’ll pay for the pad-slap. As long as they understand no warranty on noises or vibration, and their money is green - I’ll do pad slaps all day.

[@jochenstacker7448]

But is it worth it? Rotors cost me €100 for the pair, I'd want to be mad to pay as much money to have my old rusty, crusty ones redone.

[@wheater5]

We live in a throw away society. Why not replace the calipers and hoses while you’re in there?

[@Iceberg86300]

​@@jochenstacker7448go drive through a puddle & let your car sit a week & your rotor's surfaces will look just like that. It's surface/flash rust & would be gone the first time you step on the brakes. That rotor 100% did *_NOT_* just drive into that shop.

[@kleetus92]

@@wheater5 Hell, do the hard lines back to the ABS pump while you're at it!

[@rodan2852]

Cheap money gets cheap job. Whatever the cust. wants, just dont warranty it

[@CommieGIR]

Disagree here - You have a machine shop so you should know shaving a couple thousands off makes a huge difference without exceeding the minimums. Turning rotors has worked for ages.

[@FP194]

You going to pay for the extra labor for that ?

[@ZindorgamesLP]

@@FP194 wdym, resurfacing a rotor takes about 10 minutes on my lathe. that means 4 rotors = less then an hour. hour wages in germany area bout 100€. 4 rotors for my ford focus mk4 are about 600 euro. dont need a calculator

[@mopar3502001]

@@FP194 It's normally a flat rate per rotor. If you charged for rotors/drums by the hour, you would go broke lmao.

[@way2kul4any1]

​@@FP194 auto parts store does it for $20 each.

[@robertgoodwin2787]

​@@ZindorgamesLP you're getting screwed lol 2 hours per axle minimum

[@DSC800]

We call this a "rotor slap", when you could get a perfectly good brake job but the mechanic wants to sell you un-needed new rotors for $250 each.

[@phiksit]

And you can get new ones online for $50.

[@DonziGT230]

Exactly. This guy is trying to come off like a concerned professional taking care of his customers, but it's obvious that his only concern is taking care of his wallet.

[@nanerpusjay]

I would argue that customer will be back sooner than later needing another set of pads because the wear is more than it'd be with new rotors. Causing the customer to pay more in pads more often giving the mechanic more money for uncharged pads than just doing the whole job.

[@jeremybennett5547]

@@nanerpusjayI’ve pad slapped plenty of rotors… new pads lasted just as long as any pad mated to a new rotor. You’ve got to realize if the rotor is in good shape it’s worn fairly evenly. New pads wear into the rotor quick. Just as quick as new pads wear into a new rotor. After the initial wear or “break in” they will preform/wear 100% the same in both situations It is perfectly acceptable to pad slap rotors several times within the life of the rotor. Unless someone is good at riding their brakes there is zero reason you shouldn’t be able to pad slap a set or rotors more than once

[@WillieBHardigan808]

Yup this is a Mechanic who eats commission on upsetting unnecessary parts

[@emeursing]

I wanted them to top off the wiperfluid, but because the nozzles had been wet, I was told to buy a new car! 👍🏻 I've never seen someone so concerned about my safety, so hats off, great advice!!!

[@NQTOD]

And this folks is how you fleece America!!!

[@jeffkenyon483]

Lol,..well yeah🌝

[@shortfattoad7317]

Let's not forget the 'oil change every 3000 miles'... No modern car ever needs oil changes with synthetic oil that frequently. Min 7k up to 20k for some lux cars

[@ralph02136]

@@shortfattoad7317 no one has ever said to do 3000 mile oil changes for commoner cars. Its only for performance oriented vehicles that are driven pretty hard or spiritedly

[@VA-gu1jq]

⁠@@shortfattoad7317Who’s telling you 3k miles!? Dave recommends sending your oil in so you actually know whether it’s broken down or not. He’s also talking about diesel trucks that are hauling things. Send your oil in after 20k miles and see what they tell you, doofus.

[@katjoe1974]

@@ralph02136yea they have- that’s what I’ve heard my whole life: change oil every 3,000 miles

[@khaitomretro]

"This is not what you want." Damn right, I want an honest mechanic that doesn't change parts that still have 61% of their usable life remaining.

[@christopherbedford9897]

Absolutely. I can live with replacing the discs every couple of pad replacements, but _every time?_ - Sounds like one of two things, ripoff or design failure. There's *really* nothing wrong with leaving the rotors "as is" and slapping new pads on. Doesn't make a significant difference to pad life, it really doesn't.

[@ThRifTeDmUsIc]

It’s pretty close to the same in price just to put new rotors on. It doesn’t make any sense to put the old rotors back on.

[@SupraSav]

Yes and no. I do all my own car work and I can appreciate what just about every legit mechanic has said on this video. HOWEVER, there are other factors like vehicle use case (towing, large/passenger vehicle, heavy/frequent braking/aggressive driving, etc) Having less material reduces thermal absorption and dissipation capacity, which increases the likelihood of brake fade.

[@gwall1789]

I can’t find anyone left that can or wants to turn rotors, so I bought a used brake lathe. I’d rather get the max life out of the OEM rotors before I have to start using Chinesium.

[@artgoat]

@@SupraSav There is no way that half a millimeter of metal removed is going to make any measurable difference in brake fade. If anything, it should reduce the thermal mass and allow them to cool off faster-by a fraction of a percent.

[@georgecavanaugh8757]

ALSO! Notice that the “Bad rotor” he has on the table didn’t just come off of that vehicle like he claims. The braking surface if fully rusted over meaning that old rotor has been laying around for quite some time. Even a drive into the shop bay would have removed the surface rust on the contact area of the rotor!

[@damonburroughs5283]

Note also the outer edge has no crusting , there is no lip from wear and if there was, it would be all he would be measuring with that cheap Amazon Vernier. That disc looks like it's relatively new n left in the elements for a few weeks as if used on a car it would be rusty. Ford discs show surface rust in a week if not used , 1 trip and shiny , he speaks bull

[@georgecavanaugh8757]

@@damonburroughs5283 Right, this was probably a rotor he took off of someone’s truck that was perfectly usable to sell them a new one. My guess is he has one of those shops where only people with hot rod $200,000.00 trucks bring them to be worked on. If money isn’t an object like it wouldn’t be for those guys then fine, but this is a total rip off for the average consumer.

[@TheAedalas]

A couple more things: the usable thickness of rotors is going to change from model to model, not all of them only have that 1mm to spare. Which, btw, is still plenty to turn down. Even if you did turn it down to, or slightly under, spec I wouldn't be that concerned as there's absolutely a safety factor built into the spec. If I lived on a mountain then sure, I'd be a little more concerned, but since I live in a relatively flat area and don't take it on the track then I wouldn't sweat it at all. However I'm talking about my own here, I wouldn't go under spec for a customer. This seems like the kind of guy throwing a ridiculous markup on all his parts because that's where he's making all his money. I know everybody marks them up but I'd bet his markups are higher than most. Pad slaps are fine if your rotor isn't gouged. Turning a rotor is fine too. Ripping off customers isn't fine at all.

[@AdA-rl4eo]

I get the vibes that taking your car to this guy… you always find a few surprises that cost an arm and a leg 😂

[@thomasmoura]

I actually work at a brake engineering company. This guy is a hack. 1. Pads can be applied to old rotors. 2. You only need resurfacing if the rotor is warped AND if there is enough material 3. The amount of material he showed is plenty for most cases, so you could at least double the rotor life.

[@ShiftingSkys]

1 MM of Thickness is not Alot. Most New Rotors Are Brand New at 2MM of Thickness. You Can See this is a Early Dodge Ram like a 2008; Likely 1500-2500. The Discard Thickness of 34MM is Written on It Meaning Brand New These Rotors Range Between 35.5MM to 37MM at the Thickest Ive Seen. Im Sure Some Thicker Exist But MOST Store Stop at the 37MM. Meaning Brand New The Rotor has 2 MM of Life. If We Assume this Unit has Had 1 Brake Job Then With the Max Thickness Rotor it has Worn 1.25MM Which Means This Rotor Has ~40% of its Life Left if Your a Safe Soft Driver. As you get Below 10-15%~ The Rotor Risk's Warping. So effectively this Rotor has 30% of its Remaining Life Left Assuming you Only Have to Take off the .125MM as they did not Score them. 1 MM Sounds Like alot but in the Grand Scheme of things its not. If you took the Pads to the End. W.e MM Measurement here Then Effectively if this Rotor Does not Warp you likely will Use up only 75% Of the Pad Before these Rotors Warp. Good Pads are 25-35$ Just Spend the 75-100$ and get the New Rotors.

[@MDSBock]

I always wondered about putting new pads on old rotors which have mico grooves in them. I would think that it would give pads more surface area to grab, like slotted rotors. Also thought good new pads would file mico groves off rotors...

[@TadMarko]

Can they give us a little more material to work with?

[@DonziGT230]

@@MDSBock I've done hundreds of pad slaps, including many dozens where I put them on gouged rotors because the customer was broke. I haven't had a single problem.

[@EdmundSampson-pd7vi]

Most of the time a bit of a polish with a wheel is more than enough, this guy is being dramatic

[@GHP99]

As a mechanic for a semi truck dealer, I can assure you it's perfectly fine to just replace the pads. Manufacturer only want us to check the thickness and the surface for cracks, overheated spots, and warped disks.

[@robertlawrence9000]

Yep and I seen people check for warped disks, say they are good and realize after they done the work that they are shuddering. Rotors are not that expensive. Safety first.

[@BenVanAmburg]

Heat spots can be removed up to a point

[@052RC]

@@robertlawrence9000 I understand you point, but there's more to it. Cheap rotors and pads are terrible. They overheat and fade much faster than OE. That's a real safety issue. If you cut the OE rotors past the minimum thickness, its still much safer than using cheap parts. You get what you pay for.

[@stevenoe6395]

OE lol guess as long as it's not dodge I have known several people with brand new dodge cars and trucks oh and jeeps have there new vehicle brakes go out in less than 5k but also most manufacturers don't really have one anything all the parts are made from aftermarket companies that just stamp different names on the same product.i have worked for brake manufacturing companies that made brake set ups for the dealer/manufacturers we would have to stamp made in America or Japan on parts that came from over sees only way you could tell were they were from was by looking at the crates or invoices!!!!!!

[@Whatever10000]

The pads will bed into the shape of the old rotor in no time. Changing them every time you change pads is crazy.

[@limprooster3253]

BINGO! There is actually a procedure for cutting in new pads

[@charlesmohelsky4823]

Yep!

[@bruceb2817]

Will also provide greater braking surface

[@bowez9]

​@@bruceb2817correct, at the expense of pad life. And ceramic pads will grind the rotor anyway.

[@leonk.5453]

With ceramic brakes the rotor should always be changed with the pads.​@@bowez9

[@ZaOnly420]

This definitely the type of mechanic to over charge you for an oil change

[@Phil_Theekrit]

This dude doesn’t mind spending your money, he needs a new pool.

[@LetsDGBogeyFree]

I was going to thumbs up this comment, but it is against the rules

[@DG-sf9ei]

Wonder what he'd say at his pool installer who insisted.... either we're pouring 10 times the necessary concrete for structural safety concerns of the pool collapsing or I'm walking off the job

[@jacksmith2315]

Not a pool, a beach/vacation house. His obviously been screwing ppl over long enough to have the pool already.

[@altitude19]

His whole personality is being an up tight hardass. Pretty easy when you've got money.

[@johngalt5411]

Or new teeth. Never seen a better set of chops on a mechanic 😂

[@mauricerandall1216]

There is no reason why that rotor cannot be turned. Typical parts replacer.

[@Blento0404otnelB]

Exactly, these westerners do not know how to replace the light bulb without replacing the engine... So damn sick of them "over confident tools".

[@glennmorgan4197]

It's probably not flat enough after all of the heat cycles It's been through 😮

[@BassRacerx]

@@glennmorgan4197that's waht a straight edge is for. put a straight edge on it and actually check. if the customer is not complaining about the rotors being warped they are probably fine anyway.

[@afellowinnewengland6142]

A typical parts replacer?? You've got to be kidding me. This guy owns one of the best machine shops in North America and has forgotten more than most mechanics will ever know. The cost of time and machining to turn a modern budget rotor doesn't make any sense. Additionally, as the rotor thins it becomes easier to wrap. Only a bad technician would turn a modern rotor. It's not worth it.

[@BassRacerx]

@@afellowinnewengland6142 it would have made a better youtube video to go ahead and machine the rotors down and prove that the rotors can't be turned. But this is youtube shorts so hot takes and clickbait gets more views.

[@christopherjohnson4232]

Make them thicker so we can cut them down and reuse them . Not sustainable at this point .Greed drives this BS

[@TheCriminal3k]

Super tight tolerances. The new pads with the caliper may not fit

[@ronallen6578]

Use to have rotors or drums you could turn. These days it's ALL bout selling overpriced parts. Can't afford a new vehicle then you'll pay for 1 in new parts 😢😢

[@gavin2689]

The reason why you replace the rotors is because if it is too thin it heats up too quickly and doesn’t allow for good breaking

[@northerntoyota7584]

And will warp very quickly.

[@ronallen6578]

@@northerntoyota7584 Thicker normally means LESS of that

[@omniautowerks6239]

No all owners can afford new rotors on every pad change. I have replaced brake pads for 20+ years. as long as the rotor thickness is within specs without scoring or uneven wear, its good to go.

[@FrankC76]

I’ve never disagreed with a KZbin mechanic more. This is a man who wants to sell you rotors whether you need them or not.

[@wildone505]

😂

[@TommyPickIes]

You like warped rotors? Loud warped rotors?

[@richieb74]

I’ve got a scat pack with the 6piston brembos and I just did a pad replacement without changing the rotors and it brakes incredible. 107 feet 60 to 0! Great performance and the pedal feels awesome!

[@BigBear--]

@TommyPickIes Who said they HAVE TO be warped? It takes 2 minutes to measure them and determine if you can resurface within spec. 1mm is a ton of material left on a rotor to be able to resurface them. If you just pitch the client a new set of rotors without making the proper determination that they actually need them first, then you're just a sleazy salesman/parts changer.

[@TheRe-EngineeredLife]

I could not disagree more. Never ever ever EVER only replace pads with a shitty warped old rotor. Again, never do this. If your pads are past their wear limit and the sensor is making its noise as is supposed to, your rotors are going to be equally worn considering of course that they were replaced at the same time. A proper brake job is pads and rotors brand new at the same time. No exceptions. I agree with Dave 100%. This is not a shop being greedy, I have nearly been hit many times on the highway because people have shitty brakes. I truly wish that machining of rotors would disappear as a service.

[@FFSytstoptryingtobetwitter]

If you are telling me you can't machine within a tolerance of an entire fucking millimeter you're telling me your shop sucks

[@Zoom44444]

he didn't measure it right he used the wrong side of the tool aswell getting a wrong reading

[@flinch622]

Maybe. Look at a brand new rotor and you will notice something: it was ground for flatness and parallel, not turned. Those machines are expensive, and a regular shop would need an inventory of adapter plates - and inspect them regularly for flat/parallel. Me/my car/my money? I am well enough satisfied with a light turning [maybe a 0.002" finish pass]. Is it going to last quite as long as a ground surface? Probably not, but its good. I am old enough to remember some old 16mm training films and... the information put out was shamelessly defective: a "rough cut" of 0.020" ? That is obscene and unecessary except for a virgin/fresh casting that has never seen a tool, and making sure any sand inclusions or release agent is fully removed.

[@flinch622]

@Tron-Jockey Regeneration requires motion and so maybe that's effective down to 8mph or something?

[@BigUriel]

@user-xd3ij7cw8s The brake grooves aren't even a problem. There's never any need to machine brake rotors unless they're rusted or warped. You'll have grooves on a brand new rotor within a couple thousand miles, and here's the kicker: the brakes actually work *better* once the grooves have set in, because they interlock with the pads (which are made of granular material for this exact reason) and it actually increases contact surface area compared to having completely flat rotors and pads. Anyone who has ever changed a brake pad or rotor knows that there's a bedding in period, during which they don't brake as well, which is precisely while the grooves are forming. This whole clip is a bunch of nonsense to try to justify selling people rotors that they don't need. Also, brake rotors are designed with a huge safety margin and even if the specified minimum thickness is 34mm you can rest assured they're not going to brake apart on you at 33mm, or 32mm, or probably even 30mm. There's millions of cars out there with their original brake rotors which are well below the minimum spec and have been for years, and rotors breaking because they're too thin is an incredibly rare occurrence.

[@Matt_10203]

@@BigUrielyou don’t get warped rotors, a steel cast rotor will never warp. A rotor will crack well before it ever begins to warp. What can happen however is that the rotor can have pad material deposited onto its surface which can cause it to become uneven. Warping of rotors is a well spread myth, but it isn’t true.

[@gqbme2]

He wasn’t expecting the old rotor to be that thick 😆

[@aaronhiggs]

Exactly.

[@awestruck9075]

Not as thick as him

[@dinky19810]

Yup.

[@SlickArmor]

I could eyeball from here it was plenty thick. 😅😅

[@Dyna78]

I've had older, well-used rotors that were thicker than the NEW ones!

[@timwillard1495]

I’m just getting dressed for Sunday right now. I don’t wanna do that yet, but I do love diesel trucks.❤😂

[@Quiet-storm]

As a mechanical engineer i can only laugh. There is nothing wrong with that rotor, put some new pads on it and send it down the road. There is also the risk that when you replace the rotor, it could be of inferior metal like what is consistent with many rotors coming from China. The OEM rotor is typically superior to many of the aftermarket rotors.

[@KetchumCulpepper-c9v]

@@Quiet-storm YES.

[@tobindunklebarger4436]

What if the oem rotor came from the same factory that made the "aftermarket" rotor? Can't rely on any parts anymore

[@davop4919]

Exactly 💯

[@paradoxicalcat7173]

@@tobindunklebarger4436 Denso actually state that their Tier 1 parts (OEM production) ARE of better quality and accuracy to spec than aftermarket parts they also make for the exact same vehicles. They state that aftermarket parts (they produce at least) are deliberately slightly the wrong dimensions so as not to be infringing on the IP of the OEM.

[@keymad4]

well said he's just after more money

[@somenygaard]

His confidence as he incorrectly explained why customers were being sold new rotors was impressive. I’m sure most of them just do what he recommends. Exactly why I decided not to pursue auto mechanics as a career after successfully finishing the training program. I had just started the BMW manufacturer program and how things were being explained I quickly realized my ethics would hinder my earnings and my future career.

[@szanujmysie]

How those things with BMW were explained?

[@Resident_Kriegsman]

​@@szanujmysieI must know too

[@botbaki9303]

​@@szanujmysie "sell sell sell" like a HOA salesman, its not a service, it's milking your innocent customers

[@matthew4718]

Yeah it’s sad. You come to realize the “trusted” ones still nickel and dime you but they’re more convincing like this guy lol

[@RichC-on6ue]

I agree if you can repair the rotor do it as long as your in safety specifications, some old school shops still will do it and do the job well in specifications

[@marlinyoung1606]

1mm is only .039 inch an on car brake lathe will 98% of the time clean the rotor on first pass of .010 inch. Turning rotors is easily doable and a safe repair. Being a machine shop you guys should easily be able to do the math.

[@Mr.Mister001]

That's the point, they did do the math. A new set of rotors is more cash and less work for them than turning the old ones. Save time and make more money is what business is all about now. What's a little lie and ripping off a customer through fear? Add that up on a daily basis and you've definitely got a morality issue... I prefer to keep my soul over making some extra cash but my views are not popular in today's society.

[@chrisforgan731]

@@Mr.Mister001 actually depends on the vehicle it is often cheaper to replace them than skim them. by the time you set up the brake lathe and do the job the labour is more than the parts. also 5 minutes to take a new rotor from the box and fit it compared to 15 miniutes to setup and skim it. in the hr to do all 4 i can service another vehicle and make more money.

[@troyelder56]

Actually most of the “new” rotors are just refurbished old rotors that’s why there’s a core charge. Also likely the reasoning why you buy a new set of rotors and they’re usually out of turn. Idk how many times I’ve replaced rotors only to get a bad 1 or 2 out of 4

[@hutchinson54]

Man, Dave you still have a lot of haters that just understand the safety issues of brakes. But that’s the general we live in I guess. Looking for a cheap way out.

[@MrBrettrx7]

​@@hutchinson54if you think you're actually talking to Dave you must be living under a massive rock

[@jorad4887]

There's people that are saying 1mm is plenty of space for the brakes to work with, let me tell 1mm is not worth it because you're on your last legs, are you really going to jeopardize 1mm of thickness to your expensive brake pad???? It's time to say goodbye to those rotors

[@uzephi]

1mm when turning rotors is definitely plenty of room. Most times you only shave off .005" which is barely 0.12mm giving you about 90% left to wear down on the road. When you turn rotors, the goal isn't to shave off a ton of material, it's actually the opposite, getting a straight, smooth surface. Usually only a small bit needs to come off. Your post clearly states you've never worked with lathes.

[@jorad4887]

@@uzephi I bring my rotors to any auto parts store and have them buffed but there's a point now at my age that I just get new rotors, I don't know or will remember this if I'm going on a road trip to Canada, California, NY or Florida which I do 4x a year this doesn't include traveling to Asia or Europe,I will forget it and get F'd! When I was younger I would let go deep and tear my rotors because I was stupid just like not greasing oil joints under my truck and wheels,now I know better, got to much to do running multiple businesses, don't mess it 1mm, get new rotors and do maintenance on it properly, hopefully by next year I will own my own tire shop, i don't need it but I like to get dirty and love car mechanics it's either that or planes I don't know we'll see, but it's that mentality that is not good especially for customers that will soon forget just like me

[@tomm8025]

So a rotor only has 1.75mm of life to BEGIN with, STILL has 1.08 of life left, which means it still has 62% of its useful life remaining.....but this guy wants to change it, in fact he started by stating he does not do pad replacements. THIS is why people don't trust mechanics!

[@snorman1911]

How thick do you think it will be after they run it down to the very end of another set of pads?

[@artgoat]

@@snorman1911 Well, based on past example, it's simple math: 1.08mm minus about 0.2mm to clean it up, minus the 0.63mm of wear it got between pad changes (ASSUMING it hasn't been turned once already, which it probably has), which still leaves it above the conservative factory minimum thickness.

[@vyvianalcott1681]

@@snorman1911 Probably not more than double what the first set did don't you think, doofus?

[@snorman1911]

@@vyvianalcott1681 maybe.

[@aflaz171]

Is this why my wallet feels so light after leaving my mechanic?

[@Ant_105]

Bro that rotor still good you trippin, get out them boys pockets

[@Bbsauruxxx]

Honestly he should see the Indian drivers that would come to the shot there would be times where there was any pads at all in certain wheels😂😂😂😂

[@RedHaloManiac95]

It is sure but if it warped or pitted with more material it’s sure as hell gonna do it with less. Most rotors are cheap and after 50k miles are no longer straight and true. Just replace them and you have good as new brakes. Now if they’re fancy rotors naaa keep em 😂

[@thirstypilgrim97]

No diggity, homey

[@ruffryder13]

Yeah, just let the pads bed in to the old rotor, just like you'd have to do with new rotors anyway, and you're good.

[@exceptionalanimations1508]

​@@ruffryder13 yea and at the end of it you'll have more contact than you would with a flat rotor :D

[@antuanthepymp3939]

This is what happens when you take a car to an engine builder for a brake job. You get an overthinking individual who is looking for zero repeat customers, and a completely rebuilt and finished job. Dave is literally an ENGINE builder, not just a tech. Does that mean he’s right? No but he’s used to taking apart the whole darn thing

[@TheThirdMuskateer]

You ever heard the saying, “the customer would rather pay $2000 once, than a $1000 twice”?

[@aightm8]

​@@TheThirdMuskateerin this context it makes no sense. A rotor has a much longer lifespan than a brake pad. So you would be mental to replace it with the same service interval as the pad.

[@gamerincorporated154]

​@@aightm8and you can tell that he wasn't expecting that old rotor to he that thick.

[@RyTrapp0]

If this is the way he handles brake jobs, then I sure as hell don't want him doing anything with my engine

[@blz1td4u]

Replacing both IS the proper repair. I would also recommend servicing the caliper (clean and lubricate the bracket and slides).

[@K-Locke]

On this, he's mistaken, and here's why. An old rough rotor presents a higher friction surface for the pad to clamp to. It's not going to negativity effect your braking. The pad/rotor combo is self cleaning, if that's your attempted objection. The assembly is subjected to dirt, mud, rock particles, you name it. It's designed to deal with it. The reason to resurface woulld be to correct warps and maximize pad life. However, pads are cheap and replacement is simple and quick. Bottom line, if you can change the pads yourself, and the rotor isn't warped, don't worry about it.

[@redlywaxer]

Exactly! Yes if your running a reputable shop, CYA is the standard, but, I cut rotors if warped. Then if they warp again, I replace them and tell the driver to take it easy! Or you gonna buy rotors every time!

[@thisisyourcaptainspeaking2259]

Same here, my brakes work just fine and my pads last plenty long.

[@melonlab80]

One way or another I'm not spending $500 on rotors every time I change my breaks. Hell do you need new calipers and lines too? Actually it'd be safer if you buy a brand new car every year instead.

[@alsbro1234]

Said it perfect. Couldn’t agree more

[@rockyourworld5374]

The grooves in the disc are circumfrencial. So it makes the surface no more chopy than if it were ground. If they wee radial grooves sure. but they are not. Also those grooves reduce the suface area of the disc for the pad to clamp to. Those grooves can easliy be greater than 0.15 mm. Given that it used 12mm of pad for .67mm of disc. It would take 2.7mm times the ratio disc area left to grind off the tips of those grooves. Also you may note the new disc ar matt no shiny like the old ones indicating that the metal is not rough up overall. So no you would not have more friction on a grooved disc and new pad or a partly worn one.

[@danewilson8275]

Cutting rotors is an effective way to keep parts costs down. As long as the rotors are in decent shape and not warped.

[@clydearmstrong6378]

😂😂😂😂😂😂 FUCK THAT !!

[@clydearmstrong6378]

You are a hack !!

[@clydearmstrong6378]

YOU ARE A HACK !

[@longbow6416]

Or deeply gouged..

[@paulshamblin6260]

Warping is another reason to turn the rotor.

[@skyboy1956]

Don't turn those OEM rotors ! Instead replace those rotors with the cheapest thing China has to offer ! ! Nah, I'll keep turning.

[@alexwasthere1]

Could be different depending on car. My Mercedes pads wears out just slightly the inside of the rotor. Leaving a thing rim around, forcing you to replace pads and rotors. I’m pretty sure they know what they are doing and could have not had a lip but they did for a reason

[@wilsonrawlin8547]

These days you are right. Even the high end name brands are made in china.

[@idontknow31212]

@@alexwasthere1 that is normal, to ensure the pad does not protrude the Rotor. Therefore one should Reface the Surface of the Rotor with a Lathe. The minimum thickness needs to be kept, also accounting for wear of course. As explained in the Video, you do not want the uneven Rotor ruin the new pads, therefore a facecut is necessary either way

[@skyboy1956]

@@alexwasthere1 that's where I machine a chamfer baby ! !

[@ericcooley9407]

Good luck turning them. I just had to change pads and rotors because there wasn't enough ro turn from OEM.

[@deanbryan3034]

Firstly I am glad you measured in proper measurements, as a follow up video you could machine the rotor to flat and see if it comes in within spec.

[@jeremyspencer3422]

Ur full of it, I’ve been doing for 38yrs strong. Never a problem!😮

[@jamesdunn5017]

Since 1972 without a problem.

[@morpheus_9]

This guy is never full of it, just this one video.

[@hotrodray6802]

Ever been sued ?

[@Thelongmanable]

*_SAME AND 1000% AGREE WITH YOU HE IS FEAR MONGERING FOR MONEY!!!_*

[@Thelongmanable]

​​@@hotrodray6802*_

[@John_Ridenour]

This is where you find a new mechanic that knows how to safely turn rotors.😂

[@Have.An.AmicoDay]

All you gotta do is put those old rotors on the car and I'll turn them myself going down the road

[@inorite4553]

Yup! This guy just wants you to waste more money.

[@khaitomretro]

The old rotor has only had 39% of it's maximum wear and he's changing them? No wonder the planet is dying.

[@matttucker5786]

Yeah this guy is a clown

[@Dragonborn__]

@@matttucker5786 So he's a clown to you because he doesn't turn rotors, yet runs a successful shop that doesn't do shady work? Personally I'm not a fan of turning rotors. New rotor starts at 35.75mm and that rotor wore down to 35.08 which is .67mm of wear. Now that doesn't take into account rotor runout which has likely increased from repeated heat cycles. Turning rotors normally results in loosing about 0.015-0.020 of an inch or 0.381-0.508mm that would leave you with a rotor that is 34.572. If it's run for the same amount of time as is did the first time it will exceed its minimum thickness. Rotors are relatively cheap, and the old rotors can be recycled.

[@K5757-d9q]

A rotor is good for at least 2 to 3 sets of pads as long as you don’t let your pads go down to the metal

[@jaredlancaster4137]

Back in the day, rotors or drums would last the entire life of the vehicle, maybe with resurfacing, maybe not. The fact is, this idea that rotors have to be replaced at every pad change is a modern phenomenon, and people used to get by just fine without.

[@richy69ify]

not every rotor stays clean

[@32mindset]

@@jaredlancaster4137Modern vehicles are wayyy different than vehicles of the past. Way more power, way more complex, much much heavier, and made of less durable parts. Comparing cars from the 70s to modern cars is asinine.

[@jaredlancaster4137]

@@32mindset yet brakes work the same way they always have. My point was that, yes, you can resurface a rotor at least once in most circumstances. It is not inherently unsafe or unwise, as so many people seem to believe.

[@NoAnswer-j5t]

@@32mindsetdid you really just say new vehicles outweigh old vehicles? WTF are you smoking I want some

[@dilldowschwagginz2674]

Less than 2mm is all you need to successfully machine a rotor. Stop clutching your pearls

[@deusexaethera]

There's nothing inherently wrong with turning rotors. The minimum thickness is for liability reasons, not functionality reasons. You can wear down a rotor almost to the vanes before it starts to deform. You absolutely should not do this, because at that point it really is a safety concern, but if you go slightly under the minimum thickness, it will still work fine. Just don't turn a rotor if it's _already_ below the minimum thickness.

[@MeDOOD62]

My man i don't think you understand how brakes work if you are saying things like this

[@PickleWickle92]

If you own a shop and you do stuff like that, you’re opening yourself up for lawsuits.

[@mtraven23]

no....there are functional reasons, the travel of the brake piston, for example.

[@--_DJ_--]

@@mtraven23 Piston travel really isn't a concern. They have enough travel to have both pads wearing the backing plate and still work just fine. Warping the rotor is the main reason why you don't go below the spec.

[@certautotech]

@@mtraven23add to that the lack of ability to dissipate heat which will make them more susceptible to warpage.

[@rudynegrete5658]

Translation: It costs us to much money in overhead to open our doors for business, we need maximum cash total for every receipt or car that comes in our doors.

[@jonathanrpu]

It sure can be not too proffitable every week in realality for sure even when busey as hell but costs are huge with never ending tool renewal and employees and surprise jobs of complexity and lost time. Business rates and electic costs are a killer and are a health and safety issue and can lead to OWNER HEART FAILURE after working in this trade for many years . 😢😅

[@KetchumCulpepper-c9v]

@@rudynegrete5658 well it's true tho. To keep a business open you must upsell.

[@jeffreyplumber1975]

that too is valid He can slap new CHINA on that truck and put more money in the pocket . Im finding cheap ass rotors for as cheap as turning (30 bucks)

[@KetchumCulpepper-c9v]

@@jeffreyplumber1975 and they are garbage. Warp immediately.

[@chrisdavidson911]

@@jeffreyplumber1975 Where do you think the oem ones come from?

[@Fonzieforever]

Dave should know that you should use a micrometer to measure a rotor and not a dial caliper! How are you measuring the grooves with that thing. Learned this from my high school auto shop teacher. Sounds like Dave wants to sell a bunch of rotors and increase his ticket sales.

[@damonburroughs5283]

No corrosion on the outer rim, no lip on the outer edge and the cheap Amazon Vernier would only be measuring the lip if it did have one as you say. This disc was not took off a vehicle as it also wouldn't have surface rust if used

[@ggonterriquez213]

Probably gets kick backs from suppliers too

[@damonburroughs5283]

@@ggonterriquez213 the only way I can see the rusty one had been on a car is if those brakes were not working

[@gertjevanpoppel7270]

As a machinist / mechanic there is nothing wrong with cleaning up that rotor... If you are a true mechanic you have enough material to clean that rotor up. And as long as there are no other issues with the rotor you can easily and safely clean that up and get another 10.000 miles. But i understand why he saying that, because it all about profit in the dealer and they make more on selling parts then they do on repair. So they think about filling their own pockets and not on helping the customer by saving on their bills. Normal i like the videos off this guy and the information he gives... but this video he clearly is missing the point 😢....

[@katjoe1974]

This is the first of your videos I’ve ever seen and it’s enough to convince me that I would never take my car to your shop

[@jamesgarrison6430]

So you already paid them to take the old rotor off why not put a new one on for almost the cost of them milling the old ones flat and your brake cylinders have to travel less distance to start braking

[@redslate]

​@@jamesgarrison6430This is the working assumption, but it doesn't apply if he has more premium brake rotors. It's worth the time/money to double their lifespan; "safety" is not the issue it's being made out to be here. Just stay within spec.

[@GTFour]

@@jamesgarrison6430complete waste of money. Those discs will last two more pad changes! If you’re pointlessly changing discs with every set of pads, you’re buying A LOT of unnecessary discs to be changed in! They’re not free. You’re buying 4x As many discs changes as you need!

[@ronyeahright9536]

@@GTFour yep......in my area, there isn't a mechanic around who doesn't automatically include new rotors in the cost of a brake job, no matter what the rotors look like.

[@mikecunningham7621]

@@ronyeahright9536 That is because they are cheap insurance!

[@TkTk-be5qg]

Cut the rotor and stop ripping people off. No need to sell that a rotor .GREED

[@mattmcmahon8311]

Facts. Diss appointed by this video the guy is normally honest.

[@mikehoncho9344]

It costs about $40 to turn a rotor, a new one is $60-100 from a parts store. Online you can get all 4 rotors +brake pads for $90-160

[@Leucoandro]

A new quality rotor for my 4Runner runs $30-$50. Mechanics charge $50-$100 to resurface a rotor. Why resurface a rotor when a new one is cheaper?

[@mountainmamma1643]

​@mikehoncho9344 you clearly don't drive a truck. All new pads and rotars on an f150 is 500 dollars easy

[@mikehoncho9344]

@@mountainmamma1643 what year?

[@marcothuswaldner3400]

Home mechanics. Take note .You can put New pads on old rotors, they may not last as long, but once they the flat surface seats into the jagged surface of the rotor you should have good braking performance. It's cheaper and easier to do it this way. You make it twice the life out of your pads by putting in new rotors. But the cost of new rotors will be four or five times the price of the pads, plus additional labor.

[@oznetyoutube125]

Home Mechanic here. I had a great set of rotors, even wear, no hot spots, no runout... I carefully hit them with my belt sander ( to cut off the slight rust edge, and to cut through the smooth surface, so the new pads would seat). Reinstalled them with a high-end set of Pads, and seated them in with absolutely no issues.

[@Mattlawton-ft6ew]

You right the guy is over the top ocd

[@Mattlawton-ft6ew]

​@@oznetyoutube125absolutely 💯 i do same hes over the top ocd

[@dimitrijekrstic7567]

@Mattlawton-ft6ew not ocd but also not right. 1mm is plenty of space for resurfacing lmao. He could've saved you a lot of money yet achieved the same effect.

[@BWeManX]

@@marcothuswaldner3400 I've found this as well. Usually 2 sets of pads to every rotor is perfectly fine unless you pop it open and see the rotors are REALLY bad. Even if they do wear out a little faster, yeah the pads are like 1/4 the cost of the rotors or less, so you'll still come out ahead. I've never noticed a significant change in "braking performance".

[@EnglishTurbines]

As an Engineer, I would have to disagree. 1mm is acres of material if the worn surface is reasonably even. It rather depends on the owners driving style...🤔😳😏🇬🇧

[@MurphyAM]

Technically, those grooves on the rotor would actually increase the surface area of rotor to pad contact. They would take some bedding in to get the flat pad to match the contour of the rotor, but then you’d have more contact, not less. Not saying it’s the right thing, but just to clarify. Additionally, as others have said 1mm is a ton in the machinist world, and those old rotors haven’t even worn a full millimeter in their time of use. So even taking half a millimeter off would still give you tons of usable life. Guaranteed that 34mm has a safety margin in there, and they probably just mean don’t turn them below 34mm.

[@travisnyte1127]

"those old rotors haven’t even worn a full millimeter in their time of use. So even taking half a millimeter off would still give you tons of usable life" out of everything that was the most surprising to hear him talk about....

[@lenser.competition]

I came here to say the same. It has more surface area. No need to machine it, a bit of run in and you've got good brakes. This guy is changing rotors every pad change? Good little business there! The more I see this dudes videos more I see he doesn't know a lot of basic stuff.

[@alexmills1329]

I’m all for safe breaking equipment, but those rotors don’t need to be replaced if they are over minimum thickness and aren’t vibrating when braking. Generally I get about 150k out of my truck rotors before they are worn to a point where I feel they could use a replacement, but even then I don’t really notice a new rotor vs old because they still were grabbed by the pads fine.

[@melonlab80]

Same I don't replace until it wobbles, seems like a massive waste of money and time to do anything else. But I work on my own truck not others so it's probably different if you're getting paid for what you do instead of paying for it. I'd bet money he reuses rotors on his own vehicles.

[@shantyburton6854]

I hope to God your cutting those rotors before youre putting new pads on those calipers? Otherwise, pads dont last that long, and like he said, theyre ineffective as a braking system. Why do you have to burn new rotors and pads in?

[@alexmills1329]

@@shantyburton6854 to mesh them properly. The pads on my trial usually are only done every 40-50k so it’s not like they wear down to nothing by keeping the used rotor on. The pads will conform to the rotor that’s their job anyway, and if you are getting some 100k miles per pad change then maybe I am doing something wrong, but do consider when I said mileage it’s a lot of city driving, not all highway where it’s easy to get boards to last forever.

[@davidcontini7217]

True, but if the rotors are "grooved" the pads will wear early.

[@mattk8594]

Yeah he's charging for bs

[@EmTekTube]

Yes brakes are a safety item and should be treated as such, but I’m also happy people are calling out this bs. Even rusty looking rotors like that can get resurfaced with that amount metal left

[@kleetus92]

That 'rust' could be cleared out with a scotch brite pad... I agree with you completely.

[@raywest3834]

Looks like that old rotor hasn't been on the road since the 90's.

[@kodydybwad2]

I’ve pad slapped every vehicle and never had an issue

[@michaeleshbaugh6797]

Yeah I like this guy's work usually but not on this topic not everyone has the money to replace rotors everyone we change our brakes and I have never had a issue from just replacing brake pads either 😂

[@howardkeil1526]

Using this logic every 5000 miles you should call the calipers and put new pads and rotors on it because they will be showing where in the form of some slight grooves into the rotor and pads

[@seeohohkay]

amen bro!❤

[@JC-jj1xm]

Tell us more about how cheap you are

[@MyfriendthinkheOJ]

I just did my own front to back lines XD

[@Mikeyang1975]

A little bit exaggerated. There is steal meat on the old . you have all the tools to take out 0.2 mm and it will still be safe!

[@paulciley3727]

Depends on the runout. If they’re even the slightest bit warped, you’ve only got a half a mill on either side to play with.

[@BigWheel.]

But think of the weight of the trucks these go onto. Do you really trust used rotors on a tens of thousands dollar value rig that's towing a loaded trailer? Might be fine if it was my old GMC or something, but if I had a truck that was new and nice I'd personally want to keep it as nice as possible and just do the maintenance the expensive way. I'd be a fool to be able to blow money on an expensive rig just to cheap out on what helps me stop safely. Like, imagine explaining to a mechanic that yoi could afford to waste all that money on a newish truck but you're a tight wad for rotors that cost what? 80 bucks? Like, c'mon Mr krabs.

[@melonlab80]

Yeah but you can't charge half as much if you don't change the rotors, "it's a safety issue" is just bs

[@La_mera_riata86]

​@melonlab80 His shop rate is around $200 per hour and all data pays .5 to turn each rotor. He'll charge $300-$400 to turn some rotors that might warp in a month

[@christophergagliano2051]

​@@La_mera_riata86sorry you have no idea what you're talking about. Look how thick those rotors are, look how much webbing they have between the 2 rotor faces. The customer is in charge, not the shop owner and the shop owner failed to do the minimum expected service by turning the rotor and then checking for min thickness. He just ripped off the customer and posted it on KZbin, what an idiot...

[@Geaxuce]

As a brake specialist, i can tell you that depending on how much the disk throws, resurfacing can most definitely be done within 1mm. If there is no throw and the surface is relatively level then you dont need to take more than 0.1-0.2mm from either side. First, blast the disk to get the rust off. Then put it on your lathe and just let the machine done its thing. You want the surface to be a little coarse. No disk or drum is polished from the factory for a reason. Unless you mean grooves, in which case your drawing wasnt very clear. In the case of grooving, as long as 90% of the surface is flush then a thin groove isn't an issue. The pads will eventually wear themselves to fitting that contour. Of course, its not ideal and it doesnt look good but its far from being the biggest safety hazard

[@nightblade237]

Right I’ve took 0.30 off both sides and it fixed the warped rotor

[@Geaxuce]

@@nightblade237 often it isn't worse than that. Unless you're in a cold environment where you have to engage your brakes often, like coming home from skiing and there's traffic getting out or something. But you also have a minimum thickness stamped somewhere on the disk which is significantly more than .6mm. You usually have a couple of millimeters that you can remove

[@robertehatten4847]

You buy lifetime pads so I think it’s OK to let the manufacture replace pads.

[@thetruth5892]

Also, when changing the tyres change the wheels as well... just to be on the safe side😂😂😂

[@marsmars9130]

well if your changing the rims, make as well put new axels on

[@Whatever10000]

If you're changing the rims, tyres, axles then you may as well change all the suspension components and bushings. Fk it, swap out the chassis while you're at it. 👍

[@dougthompson1598]

@@Whatever10000 you're too cautious. Pull the oil filler cap off and replace everything else.

[@Whatever10000]

@@dougthompson1598 your living dangerously. There could be a speck of dust lurking somewhere in that cap.

[@kevincinnamontoast3669]

You dinces miss the point. When you change tires the roads need to be resurfaced.

[@12594]

This might be the first video I’ve seen of yours that makes me rethink how you treat customers .

[@joelee2371]

Rethink this: Dave is right; manufacturers no longer leave extra meat on rotors because they are trying to keep rotating parts light for federally mandated gas mileage; there is a limit on how thin you can drums and rotors before they become flexible and unsafe.

[@HoyaSaxaSD]

@@joelee2371nonsense. Plenty of meat on that new rotor. They’re not grinding it down 1/2MM at a time, lol

[@12594]

@@joelee2371 complete BS . Them rotors could have easily been turned . There is plenty left on Them .

[@kugelblitz1557]

​​@@joelee2371 my dear sir, he had 1.08 mm left. That's...0.0425" give or take. Or about forty two thousandths. You could probably resurface that rotor down about five to ten thousandths and still have about 32-37 thousandths to play with and have a flat surface. I've almost never had to clean anything up, even rusty and beat up steel bar, that took more than maybe fifteen thousandths to get a flat surface. That "only one millimeter" is the amount of room I leave on a saw cut to end off both sides of a new part.

[@joelee2371]

@@kugelblitz1557 if the brake pads are run down to the still backing plates, which maintenance-ignoring American drivers typically do, there will be much more than .0042" gouged out of rotors. These are the rotors one does not turn down safely. I have personally seen rotors which were worn down into the internal cooling fins.

[@brkbt93]

I bet you are also the kind of mechanic when people with lack of knowledge about cars, u tell em “ beside ur shoes, ur rotors needs to be replaced, cv joint, need alignement and ur tire is out of balance “

[@dielaughing73]

When I went in for a "FREE SAFETY CHECK" from one of the big chains as a clueless youngster, I was told that everything needed replacing on my brakes. It was an old beater so I took their word for it. I took it to my local guys and said "it's all f*cked, can you do whatever is most urgent and I'll come back again when I have more money". They looked it over and said "literally nothing needs replacing now. Come back in 5-10,000km and we'll do it then". They flushed my brake fluid and sent me away with a bill for $50. And of course, I'd crashed/trashed/sold the car by the time it actually needed any work.

[@moreshow514]

Don't forget to change the indicator fluid

[@derpitydoo8681]

I had a feeling from some previous shorts that this guy was more confident than he deserves to be. This one really confirmed it

[@shanerorko8076]

Mechanic here with 17 years experience on the tools not in the office, I have done many brake jobs and qualified at cert 4 level in brakes by Bosch Australia. 1mm is plenty enough to machine the rotor, which is not a pad slap, you take about .15mm each side on the average brake machine, so .3mm total which leaves .7mm before minimum thickness, seeing at the original brake job used about .9-1mm of rotor .7-.8mm is plenty to get you to 3mm of pad left. all the high spots or the PKR values will rapidly fall after only a few kilometres of driving, which is basically the bed in process. I've spent many hours on the Ammco Brake lathe, and have fitted many brand new rotors, my experience comes from the brake dust on my hands.

[@kylereese4822]

My way of making brake pads/discs last longer was to put higher spec parts on base model cars - in my case was I had a base model VW Golf mk1 1100cc solid discs the brakes were press and hope... Hours after getting it I installed 1.8 GTI vented discs and pads never over heated no brake fade etc.....

[@emg1951]

German car manufacturers specifically tell you not to machine the rotors and just change pads as long as the rotors are within spec, not warped, damaged, rusted, or overheated

[@constantins.2981]

Yeah, the new pads will grind the rotors to a good surface finish, when you do a good brake in procedure

[@KevinATJumpWorks]

@@constantins.2981 No, the pads will get ground down, not the rotor. If it's not too bad (like a trapezoidal cross sectioned rotor or a very badly grooved one), they will work just fine.

[@jsldj]

Says the manufacturer of Mini Coopers! No repair is too big! No FEE is too big!

[@Blento0404otnelB]

Germans do that because german mechanics are good as SHlT! Not all, but 99% of them. If I told you how bad they are, what problems I had with them and things they did not knew how to fix- you would not believe me. Also, they are not mechancs- all they know is to change your parts, NEVER to repair them.

[@TYPICALTRYHARD_]

I think some mercs have pads that are smaller than the rotors so you have to replace them when you change the pads or resurface them i guess it depends on the rotors spec

[@Cajun-it3yf]

Good job ripping people off. Do NOT go there for service. Have had many many cars and I replaced rotors a total of twice. As long as they are not damaged or warped, only swap out pads. Completely safe.

[@shoobidyboop8634]

And his other videos show him shopping for $400K cars for him and his wife, go figure.

[@devilsoffspring5519]

Machinist here. 1 mm is a TON of extra thickness! Good for a few instances of re-machining. What trashes brake discs is often just corrosion at the inner and outer edges that has to be machined off so the entire surface of the pad is running against a fresh surface. But, 1 mm is a lot! If the rotor isn't corroded then you can sometimes take as little as 0.1 mm off each side for a complete cleanup and the disc is essentially as good as new.

[@GlennC789]

So glad to see the comments here! There is NO difference in friction and the old rotor will bed in just fine with new pads. The minimum thickness rating is already very conservative.

[@donaldderp3878]

And each $75 rotor you will charge the customer $225 for. Not to mention $350 per axle for labor.

[@johnreed7915]

This is the guy who tells you, you need new rotors when you dont. Thats how he makes his money.

[@phiksit]

Look at the vehicles he routinely works on. Might as well upsell... they can afford it 🤣

[@Caffeinated-DaVinci]

@@phiksit Rephrased: You might as well be a bad person because they're rich enough to afford it.

[@RRr-qn3ue]

@@johnreed7915 , a few years ago when sears was still around they got huge fines because they were doing just what this rip off is doing. They were getting people to buy new rotors because they told them they were only good for one set of pads. Rotors can be turned a few times depending on how many thousandths are removed. Usually you only need to remove 2 to 4 thousandths off each side. New rotors start out with over 70 thousandths to minimum turn thickness. He even shows that the used rotor still had over 40 thousandths to go to the minimum turn thickness.

[@michaelholliday100]

I fully agree with this gentleman. He actually measured the lip on the rotor. Once the lip is removed, he will be below spec! I wish that he would show this being done.

[@404-Error-Not-Found]

I'm not paying 400 dollars for new rotors every time I need to replace the pads. Smooth talking scam artist. That rotor has 50% of its life remaining.

[@LoneWolfSparty]

Is that for all 4 or for 1 rotor? 🤔

[@La_mera_riata86]

His time to turn those rotors is probably worth around $400

[@swaggerdo7231]

OK boomer. Time to go get your bird flu vaxx.

[@cisco1dog]

@@La_mera_riata86😂😂😂😂

[@rolando7660]

Exactly. It’s all a scam nowadays to get you do pay more for work you shouldn’t need.

[@Gershepsky]

Wait until he learns how accurate machinists are

[@dilmaster3]

i feel like this is sarcasm because he OWNS a machine shop🤣

[@elgandos2]

Right? That old rotor still has like 40 grand of stock left, might as well be a mile in the machining world haha

[@mattmurphy7030]

@@dilmaster3for someone who owns a machine shop he’s really stupid about machining rotors. He just demonstrated to us that the rotor has several facings in its life and then said it can’t be done throw it out

[@kugelblitz1557]

A millimeter? That's 39 thousandths. Step it down a thousandth or two at a time on one side until you get a flat surface, same thing on the other side, and then cut down whichever one is taller to match the shorter side if you have to.

[@norfolkdash9]

Looks to me he's doing it by the book.. machine shop or not. He's made a name for himself and he's digging a deeper hole with these videos. He turns the rotors.. guess what he may be under the "spec" for turning, owner wrecks then sues cuz of a video..

[@Randy-o3b]

Let’s not exaggerate because a pad slap is fine if the rotors aren’t chewed up or warped. As far as turning rotors I have gotten several brand new premium rotors from Napa that were warped out of the box. No guarantee with these junk parts anymore.

[@davidclemens1578]

You gave the perfect reason why if it didn't have brake pulse, there is no reason to change the rotors. Because the new ones are unlikely to be any better other than smooth.

[@craigfin3222]

Something that a lot of people are missing here. The cost of turning a rotor can sometimes even be higher than just replacing them, it all depends on the vehicle.

[@nicolashoyt5341]

Roughly 1 hour of labor charged for turning, I got the cheapest quality rotors I could for a Chevy pickup and it was still over $100, in that case the rotors were probably barely cheaper than the labor to have someone turn them. However since it's a Colorado and the wheel hub has to be removed to even replace the rotors the labor difference between turning on the car with an on vehicle brake lathe vs removing and replacing would have been like 3 hours. So you're not wrong but it goes both ways.

[@GregHassler]

"I'm not going to do the thing that thousands of shops safely do every day because I have a song and dance of nonsense that will make me more money for doing less work. Hopefully you're gullible."

[@northernprepper6981]

There is no way in hell that rotor with rust on the braking surface rolled into the shop like that.

[@mattmurphy7030]

Looks like he took it out of the parts washer and left it in the sun for a week

[@kylemilford8758]

Trucks in for a brake servicem maybe that caliper is locked open not touching the rotor

[@Mazdatree]

Maybe it was waiting for approval and stayed outside for a couple days

[@RalphCelian]

Based on some of the cars I've worked on you'd be surprised

[@Flyingfeather3256]

I got news for you: have your car or truck sit for a whole month without being used at all in Florida during the rainy season! My mother in law doesn't drive much, and you have to see her car rotors after the car sat for a month.

[@aku2dimensional]

The title should say "Turning rotors is wrong because I don't want to do it"

[@robott6696]

Hes taking shortcuts, replace just pads and rotors? If your brakes are worn you should REPLACE THE WHOLE VEHICLE!

[@TwoWheels47]

That used rotor looks true enough. The new pads will seat properly in 10 miles of driving. Find another mechanic.

[@kylereese4822]

My way of making brake pads/discs last longer was to put higher spec parts on base model cars - in my case was I had a base model VW Golf mk1 1100cc solid discs the brakes were press and hope... Hours after getting it I installed 1.8 GTI vented discs and pads never over heated no brake fade etc pads.

[@P1983sche]

Are you for real?

[@JimmyJ26]

As a mechanic with 57 years of experience, I've worked on all sorts of cars, from fancy Rolls-Royces to humble Isettas. When you machine a rotor properly, you don't need to take off a lot of material. Two millimeters is usually enough, even one millimeter in some cases is okay unless the surface is severely scored. Don't fall for sales hype.

[@bmlmao]

As I always say, it is a miracle anybody takes this dude seriously

[@luskydaaxeman4190]

Bro even oreillys can turn a rotor at 1mm. You have plenty of meat on them before you discard them.

[@wjl46]

Brake discs can normally last 2-3 sets of pads before needing replacing. You’re also measuring using the wrong equipment, you should me using a micrometer not a vernier calliper.

[@wolf310ii]

On this discs the vernier calliper was good enough. The micrometer is only needed when they are more worn out

[@elvisbullets7382]

That's why I "Pad slap" it myself.

[@PlinkyVR]

​@@wolf310iiverniers without a cutout shouldn't be used, if your using a flat Vernier like he is your measuring the lip of the rotor, the pad usually doesn't wear the whole surface down, if you measure with verniers they measure the lip which will be the new thickness usually, unless you modified them to have a cutout to go around the lip or use a micrometer or a special attachment for the verniers

[@wolf310ii]

@@PlinkyVR The new rotor didnt had a lip, nor did the "used" new rotor had a lip. thats why i wrote a micrometer is only needed on more worn out rotors.

[@PlinkyVR]

@@wolf310ii or just use the right tool all the time? It would be pointless going "is this rotor worn enough that I won't need Vernier calipers on? When you can just simply grab the right tool every time and know it'll measure correctly, even a pair of verniers with a 3d printed hook on the end would be sufficient I use that all the time but a straight pair of verniers is such a waste of time especially trying to measure through a rim

[@chrisfoxwell4128]

Unless there was a problem, those rotors will turn down and still have a minimum thickness. He just proved how little wear there is on the rotor.

[@DC9Douglas]

Shaking my head at this comment..... Dave is 1000% correct on this short. His wisdom is how I was taught to do brakes 25 years ago.

[@chrisfoxwell4128]

@@DC9Douglas , 25 years ago your teacher didn't want to pass up a $600 brake job by not getting the 50% - 100% markup on the rotors.

[@Mr.Mister001]

35.75 new and 35.08 used. You're absolutely correct. Just shops ripping people off through fear as usual...

[@928pcar]

@@DC9Douglasyou were lied to

[@PseudonymAliase]

I just have a garage I do all my work out of. If it needs a brake job I test drive it down a really steep Hill at 60 miles an hour and see if they are warped. Then I check the rotors to see if they're dished or scored. I won't even replace the rotors if they look fine. You can throw on brake pads with no problems and they will be fine driving on the mountain highways around here. I don't bother turning old rotors I'd rather just buy new ones.

[@Can8ian.]

I have used the same rotors for almost 200000km just change the pads every 50000km. Asked my mechanic if my rotors were still good and he said they are fine. No resurfacing or anything and my brakes work great.

[@FastestStockCarEver]

It’s called bedding in the new pads. These guys are Primadonna‘s!!

[@hondaguy9153]

Turning rotors isn't wrong. It also helps if you measure with the right kind of tool.

[@MistahMatzah]

If they're selling their scrap they lose a whole $240 per gross ton, or $6 per pair of rotors 😂

[@horseblinderson4747]

They also put autozone rotors on, charge you an absurd upcharge margin on them, + labor, then you will be replacing them with your pads next go around.

[@DavidStrchld]

Not only is not not wrong, it's what you are suppose to do.

[@declankelly8937]

That is not the correct tool for that job. Using the correct tool might have made a better case for replacement of the rotor. If a rotor is .8mm above minimum after machining then it will out live the pad.

[@chrisgrey9204]

From my experience, unless the rotor is really bad warped, it takes less than 0.008" (0.2mm) per side including a 0.001" smooth cut to get them true again. That's, at worst, 0.5mm tops for both sides. You could turn that old rotor at 35mm and still be sufficiently away from 34mm with room to wear. I understand safety, but in this case, it seems overly cautious, bordering on wasteful. But feel free to disagree if you feel that strongly about it.

[@Mr.Mister001]

Gotta line those pockets. He'll probably sell the old ones on ebay as "basically new". Funny because it isn't a lie with only losing 0.42mm...

[@swaggerdo7231]

I get brembo rotors on amazon for less than 70$ each. Are you saying you will turn my existing rotors to "true" cut for less than $30 each? Where do I ship to for this service? and are you paying for enough insurance to cover any inaccuracies in your statements if it all goes south and there is damage to metal and meat?

[@chrisgrey9204]

@@swaggerdo7231 I don't work in a garage anymore. However when I do my own brake jobs, I have no problems turning a rotor that's got plenty of width still left on it. I take my rotors to a local place that does them for $20 per...much cheaper than buying a pair of new rotors. If you do traveling service, I can see how the time and effort wouldn't be worth it.

[@42468]

@@swaggerdo7231 oreilly’s does them for $40-50 each if they still have the lathes

[@18avshalom]

Id rather have OE rotors at 34.01 mm than cheap aftermarket ones.

[@BLACKMONGOOSE13]

I remember when the shops would turn rotors. That was standard, not replacing. Totally understand now why it’s not economical anymore. Just makes it easier for me to do brakes in my garage. 😁👍🏻

[@jeremyg9240]

My shop still turns rotors. I have a standard lathe and an "on car lathe" that resurfaces the rotors while they are still mounted on the car.

[@davidcontini7217]

When they used to use solid rotors, there was a greater margin for grinding and cleaning the discs. Vented discs have very strict tollerances.

[@koDaffi]

The dealership here said they still do it during brake job. Another shop in town says nobody does it anymore. No clue who to believe. If they ain't doing it I might as well just change the pads myself for the price people charge.

[@ineedapharmists]

​@@koDaffisome do some don't. And it's basically the price of a new rotor

[@chrisforgan731]

@@ineedapharmists yep for the house mate's car its cheaper to buy new rotors. even if your doing it your self

[@MAGASupremacy]

I've been a mechanic for 783 years. I worked for Ögedei Khan, the Mongol Emperor. I can tell you you can take off as little as 2 strands of human hair or up to one grain of sand's width of material to produce a clean rotor surface.