Dont make this mistake when you grease you caliper sliding pins | typical mechanic TIP

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[@MadMonk67]

I've done brakes both professionally and on my own vehicles for over 30 years and I was taught to wipe off the tips of the pins so it acts as a reservoir for grease once the pads start to wear. I never questioned it, but just did it as habit. Your explanation makes more sense to me. Different reason, but same result.

[@RBTheMechanic]

Yes!!! I had brakes go bad on one car 3 times issue was the very end was packed and as I put grease it got more packed then I did full inspection bore cleaning and light amount greasing car never came back for same issue been 4 years still running good

[@itsjustktg]

Can you use car oil to grease the pins and well or do you have to use a type of brake temp grease ?

[@MadMonk67]

@@itsjustktg No, do not use any kind of oil. It will not hold up. Grease specifically for brakes is best, but in a pinch, I've used high-temp bearing grease.

[@tomdobbs6820]

If it's not silicone synthetic grease, it will eventually eat away the rubber. So, no petroleum based oil or grease.

[@LastTrump7]

@@RBTheMechanic Should new brakes pads and rotor still feel hot after driving 8 miles on flat road only braking a couple times?

[@metalhalide4043]

There seems to be enough clearance between the pin and the bore for excess grease to get out under pressure otherwise the pins would not go into the bore with the bushing, also, the bushings have groves which is probably by design to prevent hydrolocking..

[@Lambros_Stefaneas]

I agree.

[@needmoreboost6369]

They will hydro lock and can push back out after installation because of the trapped air inside! so a simple solution is to leave one side of the pin dry and rotate it after installation to spread the slide grease.and as a response to the laughable comments below im actually a mechanic that obtained my qualifications at a braking system specialist shop! I reconditioned thousands of brakes around the country I’m a specialist in brake reconditioning since late 90s

[@metalhalide4043]

@@needmoreboost6369 Wrong, if you have worked on brakes long enough you know the pins do not fit tight in the bore and there is some clearance between the pin and the bore for grease to escape..

[@metalhalide4043]

@@erichaymore5902 Not necessary, why would you gouge up your calipers with channel locks? People that do not work on brakes everyday are the ones most in error posting on here..

[@philbuell6657]

Easy fix, just don't slather the pins in grease like you're buttering a cob of corn, duh...it's called discipline in your work habits

[@valichesu]

You can put as many grease as you want, the excess will be trown out when you first put the pin into the caliper, there is enough clearance. Actually the most important thing is to clean the pin and the bore from the old grease before puting new one. Especially for older cars where a wrong grease might be used.

[@RBTheMechanic]

That’s not what happned to one of my ccustomers car that killed rotor 2 times in a month

[@mentals555]

I learned about this a couple weeks ago on my Honda S2000. The pin did not have clearance. One would not press in far enough by about 3/8". I pulled it out and wiped the grease off the tip. I repeated this several times and the grease kept changing color. There were 3 different colors of grease that had been trapped at the end of the caliper pin for who knows how many years. After removing all that excess the pin slid in fully without any more problems.

[@RBTheMechanic]

@@mentals555 yup all the grease had been up In there from previous brake jobs

[@MrPapakuka]

Not with that rubber thing on the end....i had one that would not go in all the way to even get the bolt in..The rubber scraps all the grease into the end of the bore and wont compress

[@kevins5268]

​@@RBTheMechanic probably a shi* caliper

[@slipperyjohnson7016]

I learned this a long time ago and it's a good tip. You should always check the pins and lube them. Also, before starting the brake job you should buy a boot kit and have it on hand in case you need it. Sometimes the boots are cracked or "swollen" and they need to be replaced. If water gets in, that's gonna wash out the grease and cause the caliper to stick.

[@RBTheMechanic]

Yup

[@brandonbragg6670]

What if I have to wait for 3 weeks and only one and half of my brakes work

[@frandanco6289]

@@brandonbragg6670 Drive very slowly and carefully??? :)

[@mikeross111]

Just did my brakes today, replaced rotors, pads, full flush. One of slider dust covers was torn, I didn't buy them 😢 Now I gotta replace them in the next week or so. I learned my lesson.

[@jimmys.8062]

@@mikeross111 It happened to me today! But luckily, I had a spare boot, from a prior brake job. Only 1 of the boots was torn. And that pin was seized pretty bad. I Almost had to postpone my job another day.. and get a ride to AZone just for the boot.

[@leexxxa]

just here to confess that after 3 infuriating bracket rebuilds, failures & then replacements due to seized pins giving me major issues - i stumbled upon your video & have been forced to come to terms with the harsh reality that the issue was never the caliper, pins, etc. the issue is me. i’m the issue. & the ungodly & horrifically wrong globs of grease that i swore had to be applied in order for the pins to work. ( ps i am currently mid brake job #3 (go figure) & almost threw the wheels back on … changed my plans & now have all 4 brackets back on the bench lmao ) thanks for the video & saving myself hopefully another brake job . i learned something

[@RBTheMechanic]

Yeah usully that can be I grease my honda after every winter so it don’t jam up clean and grease em

[@fernandobriseno8164]

Just grease more frequently, I'm a light braker so my pads last years. Unfortunately the grease does not so after replacing my seized pins, bracket, and ruined rotor I regrease them once a year.

[@rnrjukespot]

Residual grease in the cylinder wouldn't permit the pin to seat properly. How to insure the pin is located at its correct limit?

[@daniellam4472]

Good day all the expert mechanics, As a lic.mechanic by trade myself, The brake pins serve few things #1. By allowing the caliper slide Sideways freely without holding Or dragging when braking. #2. The O-ring on the pin is to absorb the pulsation,noise making while braking.some O-ring does has grove which allow excessive lubricant to pass through.ofcourse we don't lube the end pin with tons Of lubricant. right. #3. Some late model Ford build vehicles or trucks has a rubber damper built-in sliding pin on rear brake calipers.It serve the same purposes.

[@RBTheMechanic]

Good information I like the flat spot slider pins

[@daniellam4472]

@@RBTheMechanic Different car manufacturer has their own designs. They pretty close to serve the same purpose.

[@ballhawk387]

Good tip (literally). One thing I always do is move the pin in and out fully while putting it all back together.

[@gregoryblair9810]

Thus pushing any grease you left on the sides of it onto the bottom anyway, I don't think that pin bottoms out to the point a bit on the end will bother. IMO

[@Oldnoitall]

Yes, yes, that’s why she said

[@s.akinribido5894]

@@gregoryblair9810 Because you have never done thousands of brake jobs. It does matter

[@thomasinnis2370]

That's why there's flat spots on the sides of the pins. Also, there's no seals along the pin and it's not an interference fit so there's clearance for grease to escape. Good concern but invalid. Pump it in with your hands a few times to ensure it's bottoming out.

[@RBTheMechanic]

Not all have flat spots and slider pull outward as u apply brakes and it pushes grease internally and then that grease drys up over time and packs up more u put more it get packed good idea would be to clean it as well watch my second part to cleaning internal bore

[@thomasinnis2370]

@@RBTheMechanic if we were talking about precision machined and sealed pistons like a hydraulic system then your logic would apply. I'd rather have 100% grease coverage as it's less area for moisture to accumulate and lead to rust.

[@sunilcherianpullockaran8817]

I know it is too late for a response being a 1-year-old thread, but for future DIY freaks, here is an insight. I had a confounding problem with my Chevy Cruze Diesel for more than 6 months when the calipers would not release after lifting the foot off the brake pedal once it got to high temperatures. The brake assembly used to be serviced the usual way at the authorized service centre by greasing the slide pins with appropriate grease from many different brands, but to no avail. The mechanic then felt it was the synthetic brake cylinder seal, but that too was not the culprit. I then decided to do a DIY of the problem and found out that the caliper pins were not the problem at all and neither was the piston rubber seal. The actual issue was with the front disc brake alloy pistons of the brake caliper assembly. Do not ask me why but the composition of the piston used in the Cruze Diesel in Bhaarath (India) was suspect as it enlarged minutely over time (it was not the brake cylinder rusting); I sanded it down and then cleaned it thoroughly and put back the assembly, and it has been a smooth ride ever since. Fuel efficiency too has gone up from 9kmpl to 14kmpl as there was severe drag from the brakes. Acceleration too has gone up by leaps and bounds. In my particular case, the piston was the culprit and not the sliding caliper pins, brake cylinder or the brake cylinder synthetic seal.

[@RBTheMechanic]

Good job Sunil Ji!! Glad u did it urself I find if u work in ur own car it’s best at least do basic stuff when I work on my customers car I treat it like it’s my own car and I only take in 2-3 car a day that’s all I can handle and I do it well some of my viewed come to me from another states just because they want their brakes serviced just the way they saw it in the video!!!

[@tjmusa]

great tip, all the years of changing brakes, never thought about the grease build up and the travel distance. thanks again

[@RBTheMechanic]

No problem 👍

[@Allthetacosaremine]

The clearance is a little low between the bore and the pin but there is already grease in the bore when you insert the pin so there will be grease at the end of the pin anyways. Really a mute point to worry about the hydraulic pressure is so high in brakes it will force the grease past the pin to the side. Just do the same to each pin for even braking. biggest thing when doing brakes is make sure you clean things up so parts don't hang up and inspect your boots. Torn boots can alow moisture where you don't want it allowing pins and pistons to rust together and seize preventing movement. If a car sits a lot in Northern states there are places to put grease like where the pad slides on the hardware. This is a choice of the lesser of 2 evils.... it can create binding but also prevent pads from rusting to the hardware. There are coatings or just stainless steel materials used to prevent this though northern technicians know this all to well coatings or stainless doesn't mean it can't rust.... it will. Work to the conditions you deal with to provide the best outcome. Depending on the environment you live in depends on the problems you deal with I have had to replace axles when doing wheel bearings due to the condition of the end of the axle and the axle nut where the threads have rusted away and rust is the only reason it's still together. Snow and salt are not your friend. So biggest thing before starting a job inspect and identify issues. While doing the job clean, use the proper materials for the job and DO NOT CUT CORNERS.

[@RBTheMechanic]

Thank u for detailed message yup if this video and convince a person not to over look this it’s much appreciated video

[@tedthornton7791]

Is the grease, that you spoke of, already in there suppose to be there though? Or is it from applying to much from past brake work? If it's not suppose to be there, then would it be advisable to clean it out and apply the correct amount to the pin? I've always got the small packs when purchasing new pads.

[@RBTheMechanic]

@@tedthornton7791 it’s from apply and if u did brakes before it’s prolly in there as well

[@Allthetacosaremine]

@@tedthornton7791 you can clean the bore out a little if you want it wont all come out. most people don't do it. I take the boot off and use a small round wire brush on a drill to remove stuff say if someone used antiseize on the pins to try and get as much out as I can to prevent binding. Otherwise there is going to be a little bit in there its not really preventable and it not a big deal. Also DO NOT use antiseize it makes your pins stick I use it only on bolts that commonly stick like suspension bolt in bushing or eccentric bolts also in suspension for alignment purposes. Paint the bolt and back side of offset washer

[@jessgvirtual5822]

Totally agree to do these things in the rust belt. Also need to use proper grease or your boot will deteriorate prematurely....Always use grease compatible with your boot. NEVER USE PETROLIUM BASED GREASE OR YOUR BOOT WON'T LAST LONG!!!

[@drwisdom1]

Side issue. My wife's brakes have little rubber booties to protect against brake dust entering the caliper pin channel. But one wasn't installed properly at the factory. By the time I discovered it the brake dust had entered and it had been jammed for a while causing uneven brake wear. It was fixable but very hard to yank out. So make sure if you have rubber bootie protectors that they are reinstalled correctly.

[@RBTheMechanic]

Yup that too boot is important water get in and jam it all up with in weeks

[@hyruthan]

Thanks! Was wondering why after replacing one goes in all the way and the other doesn't. Now I've realised and fixed my mistake, thanks to you.

[@RBTheMechanic]

Glad u figured this out

[@todd5082]

I was thinking the whole time what can this guy teach me about brakes I don’t already know. The grease at the end prevents the caliper from sliding. Nice video👍

[@RBTheMechanic]

I have good videos coming I had bad experience I did part 2 to Thai video comming soon clean out the bore and grease light amount. But cleaning the bore is a must

[@todd5082]

@@RBTheMechanic I’ve had brake pads wear out prematurely on one side before. I just chalked it up as a bad caliper. Now I’m thinking it may have had old hard grease packed into the end preventing the caliper to fully slide. As u know all caliper “slide” grease is not the same!

[@RBTheMechanic]

@@todd5082 yup do cleaning and make everything nice and smoothing moving

[@chrisheffernan6600]

Great vid. The grease you use is top notch. Using the wrong products will cause the rubber boots to swell up and allow moisture inside to cause corrosion.

[@RBTheMechanic]

Yup thank h I love this grease

[@BenVanAmburg]

When you grease the pins, you have to push the excess back into the boot when you check the movement of the slide pins before re installation. Boots come from the factory with grease on the tip. Obviously. It moves!! It needs grease

[@craiglist308]

hey man thanks for posting... had problems with brakes and caliper pins and after changing this, my pads wear evenly... big win for me... Thanks!!!

[@RBTheMechanic]

Thank you for the good comment!!!

[@BBQDad463]

Thank you for this video. Excellent exposition of a little-known but very important issue.

[@RBTheMechanic]

Very welcome

[@TunerZen]

Grease on the tip doesnt matter. It will get push to the side anyways and push back out. Its important to clean them and grease them but it doesnt matter if its on the tip.

[@marksprivateyouyubechannel3130]

Hey, pretty good tip not to grease the tip. This seems to make sense so next time I’m greasing them, I will follow your advise!

[@NeutronX101]

Great tip. Plus pulling out the pins will be harder because the grease makes a suction vacuum effect.

[@paulthompson984]

You da man! Great pro tip! Got it done right today, all 4 on my wife’s 14 odyssey and all 4 on son’s 06 pilot. Piece of cake, cause of your helpful videos!

[@RBTheMechanic]

Nice good job!! Glad u did this urself!!

[@pontiacgto2005]

Always use the silicone grease as shown. They dont dry out like the standard grease.

[@vicpetrishak7705]

Silicone Paste also works well . Silicone Grease with an added thickening agent turns it into Silicone Paste .

[@davidcampbell1899]

Thank you for that tip! It just showed me what the problem is with my back break pad, that i changed 2 years ago!!!!

[@RBTheMechanic]

Glad video helped

[@ocdaddvids]

My experience is that a slightly sticky or seized caliper pin will cause a pad to wear unevenly. Most if not all times it seems to be the lower pin that is close to all the winter road slop.

[@RBTheMechanic]

Also brake pads jammed on bracket I seen pads stuck even with hammer they wouldn’t budge

[@gfriedman99]

@@RBTheMechanic Correct - this is mostly a problem up north in the salt belt. The rust and corrosion will build up under the clips and make the caliper bracket dimensions smaller and seizing the pads. It is very important to remove as much rust as possible where the pad ears contact the bracket and coat the surface under the clips with moly grease.

[@fiskfarm]

@@RBTheMechanic I for many years now simply leave off the ss guides. That way the inevitable rust does not ever grab a hold of the pads. I'd rather have a little rattle, which I have never heard btw, than a stuck pad. Been a game changer for me and I do alot of brakes here in the mountains of NE TN.

[@dannyzamudio1252]

​@@RBTheMechanic how often do brake pads should be replace?

[@jwil4905]

@@dannyzamudio1252 When they wear down. All depends on how you drive. Check 'em every 6 months.

[@PX77-i9i]

Wow! Actually spilling the beans on the machanic game! Very true. Thank you for your expert advice. I always wondered why this was happening to my vehicles. Less is better.

[@RBTheMechanic]

Yup

[@alanfrancis9225]

Good advice. What I did ( being carefully not to scrape inner bore) is to wrap rag around screw driver and clean inner sides of bore. You will be surprised how much dirt and grime this reveals (using turning corkscrew method.)

[@orinmangar2333]

Check into using brakeclean and/or get a nylon brush with the diameter of the pin.

[@tracewallace23]

For years I've been using a round wire brush (the right size) and brake clean and taking time to clean out the inside of the rubber boots. I've never had any problems with this method. 🙂

[@jeffreywhitlatch1409]

That’s what I do. I clean those bores with brake cleaner and paint sprayer cleaning brushes, that clean out the bore real good.

[@reallyhappenings5597]

Use bore brushes they are easier. I clean every fastener and bore that I touch.

[@alanfrancis9225]

@@reallyhappenings5597 Good idea . Where do you buy yours and what size?

[@begunthisfeelingandaninsti1853]

Hehehe! Good rule of thumb as you never want to over grease!! He is doing the opposite of what he should thought the sliding pins are designed to not only slide back and forth but also to create air compression to aid on springing the calipers to the open position, that combined with the break line vacuum suction is the mechanism used to spring the calipers back open. Not doing it causes premature wear of pads and rotors and it could also cause rotors to overheat leading to reduced braking capacity all the way up to break failure and early rotor deformities. It also causes break pads to wear unevenly which will cause early replacement necessary, that is when you get on the same set one side of the pad is fully gone and the other still has plenty of meat left. This is where the extra PROPER step really matter.

[@joesc641]

I'm a retired mechanic and have been doing brakes for a very long time. I never had a problem by putting a little grease on the tip of the pin. Do you really think the manufacturer designed the pins to bottom out inside the caliper bore? There is clearance inside the bores for a little grease. 40+ years of experience.

[@RBTheMechanic]

Yes there is clearance and the slider pin pushes out as u apply brakes and what happnes to grease that’s there it gets pushed to the end again and again and before u know there is no clearance since u already packed it up…. Well the question is why didn’t the brakes go bad after I did brakes twice and third time I didn’t put greasing on tip it was lesson to me

[@ciphercode2298]

I've always maintained my own vehicles and although I dont use the amount of grease that you did there,I've never had any problems greasing the entire pin. We do drive in alot of snow,slush,ice,and rain too. Just a dab will do ya.

[@ron1836]

He is right about too much grease. It seems like it should be able to work passed the pin. But it doesn't it stays down in the end and creates a bit of pressure. If you try pushing the pin in all the way with the finger it will push back out. Almost as if it has a bit of spring pressure. You don't want that. It's not a huge problem. But yeah it may cause uneven pad wear to some degree. Also I live near buffalo NY and things rust worse here than I think anywhere else in the country. Due to temperature changes, humid summers, and wet slushy winter roads. Which they dump enormous amounts of salt on. The bigger issue around here is people not cleaning the pad slide surfaces on the caliper brackets. The rust accumulates and seizes the pads to be stuck in one place. And alot of times people will just hit the old pads out with a hammer and then squeeze or pound the new ones in to that tight surface. You can take files or screw drivers and scrape all that out. But I guy taught me long ago that a quick and easy method is to clamp the bracket in a bench vise and use a cut off wheel. It will fit down into the grooves and you just gently go back and forth until you get to bare metal. Then he would spray paint the grooves and then grease the ears of the pads. I have even had brand new pads that were mishapen from the factory and I have had to file or grind the down a touch to fit and slide nicely.

[@mentals555]

The springiness you're talking about is caused by air being trapped at the tip of the pin. Usually if you wiggle the pin while pushing it down and holding open a gap in the rubber boot, you can get that pressure to release. I learned that trick from a South Main Auto channel video. In the case of too much grease at the tip of the pin, the pin will simply feel like it's bottoming out in its hole too early.

[@ron1836]

@@mentals555 it depends. Sometimes it will push out. Sometimes you have to put a small screw driver in there and scoop a little out. Depends how tight the bore is. In the north sometimes the bore gets tight from rust and you have to spin a drill bit in there to clean it out. Sometimes the pin will completely be seized too. And the fix for that is to clamp the bracket in a table vise and heat it with an acetylene torch while hammering on it. And trying to spin the pin with vise grips. Sometimes you may have to quickly cool it down with water and re heat it. Maybe a couple of times. But generally heating it red hot the first time near the end will create pressure in the bore and the pin will fly out like a bullet. I am a professional mechanic myself. so I've had alot of real world experience with this stuff. Living near buffalo our cars completely rot away in 10 years. I actually live like 2 hours west of where Eric O has his shop. Eric the car guy was from around here originally too!

[@RGcorbett]

I love the south main auto channel Eric O is the freaking best!!!!!!

[@shith00k]

Excess grease is forced out in the designs I have worked with. There is usually excess bore length for the pins so grease on the tip unless it is really thick and not forced out when installing shouldn't be an issue.

[@canuckfixit7722]

So I always test-slide the pins from full depth to the limit of the boot stretch after installing and wiggle them around a bit to distribute the grease inside. You will feel any unwanted hydraulic pressure that way. But only so much is needed; any excess will have to be squeezed out and wasted.

[@Snouthunter]

I've been doing it wrong for years... I see now. Thank you for this video.

[@RBTheMechanic]

Yeah that benifitted me for last few years I had brakes rotors over heat on one car over and over due to this

[@theayatollahofrockandrollah]

I always grease 'm up real good also on the end never ever had a problem

[@mariog5970]

I welcome your point of view; however, I disagree with it. Moderate amount of grease works just fine. Great video. Thank you.

[@RBTheMechanic]

Yup thank you

[@steve0680657]

In normal use the pins dont go all the way in anyway. This is a totally pointless thing to worry about.

[@jessgvirtual5822]

Extra grease will be squeezed out of the pin boot. Theirs too much piston pressure on the calipers that grease will slowly be pushed out...Caliper pressure sooo great its enough to stop a moving cars inertia - this is really pointless. Pins have flat channel for extra grease to come out at the back end and through the boot...only few mm are taken out of the pads (and rotors) for each stops that excess grease coming out of the boot is negligible....

[@vicentegumataotao5618]

I’ve seen pins with excessive amount of grease in the bottom cavity Yes it does make sense. He hadn’t explained it thoroughly

[@pharezknights5467]

Keep silent, when the caliper expands the grease pushes the pin and cause one side to grabe, this is very important

[@steve0680657]

@@pharezknights5467 Shut up now. You're talking trash. Calipers don't "expand" that's rubbish. Grease doesn't "push" on anything, more rubbish. No sides "grabe", Shut up and learn to spell. Foreign troll.

[@retydown7521]

@@jessgvirtual5822 Nope that pressure only works one way the pin will push out but not return causing drag uneven pad wear or even over heat the caliper .

[@applesbighatranch6906]

You have shown us how to "blueprint" our brake caliper mount! (making sure the assembly is true to/and square) ¡Bravo! y gracias

[@RBTheMechanic]

Yup

[@justinsmith623]

When you pull out the pins, there’s always grease on the end. It’s typically cleaner than the grease on the sides. I call shenanigans on this entire video. Diagonal wear is caused by binding, not have grease on the end of the pin.

[@RBTheMechanic]

So why did rotors go back 3 times on one car and once we cleaned the inside it was good? Why?

[@broken1965]

​​​@@RBTheMechanic Because crud an grease mixed together get packed in the pin bores i have found this in many reconditioned OE calipers PAY ATTENTION NAPA the bores need to be cleaned thoroughly round brushes an proper reamer if needed

[@broken1965]

Problem is crud gets packed into the blind pin bores not clean grease😮

[@RBFR01]

Silicone grease is petroleum based and will swell up rubber slide pin boots so use a ceramic grease, Bendix make it and that's what I use, works fine.

[@RBTheMechanic]

Ok will look in to it

[@K4rt80y]

Perfect. Right to the point. You didn't take 10 minutes to tell us what you did in 2 and a half.

[@RBTheMechanic]

Lol yeah sorry

[@begunthisfeelingandaninsti1853]

Also you don't want too much excess so that it doesn't create too much resistance for the master cylinder to push against. You really want that sweet spot where travelling it all the way in and out is possible but it offers resistance on both ends of its travel. The way I get it right everytime is by brushing the silicone grease on the pin freely than after cleaning the guiding hole I insert the pin as far as it goes by hand (it should spring back before going all the way (what causes that is the excess grease) if it doesn't do that you need more grease... Than pull the pin out wipe excess off of its tip if it is a threaded tip or not depending on the vehicle you treat it the same way by whipping the tip off until it is clean of any grease on the tip than stick it in. The job is done. That I have figured out over time is the most fool proof way to get it right everytime and the calipers work at their best when lubed correctly. If you always do it like that your calipers will never seize, also lubricate the pistons directly with a thin layer and lubricate back of pads clips and sliding guides for the pads with a thin layer. Once piston rubber seals loock cracked block fluid line replace them and bleed the system. Do it like that and they will last longer than the car functioning perfectly everytime at peak of its capabilities. Breaks, gearbox, diff, trans, timing, cooling procedure really matters and extend greatly the life of the vehicle. Always check all aspects of the entire system you are working on, mechanical, electrical, hydraulics and I always also consider corrosion factors.

[@thewrongbike7709]

Thanks for making this. Its not that the grease doesn't compress, its that the air at the end of the side hole can't escape so its the air that compresses and pushes back. Its even worse when people use copper slip. A thick gloopy air seal until the heat evaporates the grease and leaves a stick abrasive paste behind.

[@RBTheMechanic]

That also and grease drys up over time and most people don’t clean it and it drys over and over the bore length decreases slider can’t go all the way in and mechanics just jamm it up

[@chrisheffernan6600]

Grease does not compress, its a fact.

[@thewrongbike7709]

@@chrisheffernan6600 I'm not stating that grease can be compressed. Obviously it can't. I'm stating that grease compression is not the reason.

[@flapjackson6077]

Excellent tip! That’s something most do it yourselfers wouldn’t realize.

[@RBTheMechanic]

Yup

[@kevinblaylock9883]

Yep, used to grease the complete pin! Thanks for this, makes perfect sense!👍

[@greenbudzzz]

Too much grease can squeeze out by pressing on brakes but the pressure can make the bottom of the boot pop out and leave a small opening for debris. Ask me how i know!

[@RBTheMechanic]

Why would u want it to squeeze when there’s shouldn’t be no need to cuz while it’s squeezing it’s over pressuring brakes

[@InexplicableBill]

It's that pin that has the rubber seal on the tip - that seal will compress with too much grease in front of it and will not allow grease to escape as some have stated in other comment. You're tip here is so important!! I learned it the hard way on my first couple Mazdas, which had crappy brakes to start with.

[@RBTheMechanic]

Yup I learned it hard way!!

[@InexplicableBill]

@@RBTheMechanic I prefer not to divulge how LONG it took me to learn that the hard way... haha

[@grejen711]

Cool. I do my own brakes most of the time (ridiculously easy on some cars). I'm generally careful to be sure not to leave any 'dry' spots on those pins but don't get carried away otherwise. Great tip to watch the tip does not get greased. Thank you.

[@leobuck2060]

Thank you for this! 👍 A lot of naysayers here in the comments: some seem unable to fill in the blanks where you were unable to explain every little detail in such a short video, and some seem to be deliberately avoiding acknowledging the specific point you were trying to make just so they can contradict you... those are the real gaslighters, and we'll just ignore them. I'm not a mechanic by trade but I've been doing my own mechanic work for +35yrs. and I've wondered on these pins how much is too much. I've been guilty of putting a decent gob of Grease in the hole but mainly for corrosion prevention. I guess just a thin coat through the guide hole would be sufficient. I've always wondered whether too much in one whole more than the other would cause the pads to rest unevenly on the rotor during non-braking. I've seen uneven pad wear and wondered if that was the cause. This is the first video or any source of advice that I've seen or heard that addressed this specifically. Good job and thank you!

[@RBTheMechanic]

Yeah only those will understand if brake rotors worped on them winthin 2 weeks and again till they do this correct

[@san1eong]

Very important detail that even most mechanics doesn’t know. Thanks for sharing.

[@chriss6625]

Thank you! What an awesome way to teach it too - contrasting examples

[@clipofthedayyup4907]

That is a good tip. I am experienced and the light bulb came on right away. This is the kind of content people need right here. Great vid

[@JR-kr1lv]

Learn something new everyday. Now teaching my son's, I won't make that mistake on these new Foreign Vehicles. From the factory, they don't put enough grease on them, 50,000 and can't get bolts out like put on 200lbs worth of Torque, I know there not or would break being cast Aluminum, grease the threads well, last Honda I did with my nephew, he couldn't believe how tight they was, I tried and couldn't turn, he did it. Just not a lot of grease on pins at all, and super tight. Son just did his Kia and I told him it's not 45 minute job max, these now take much longer with bolts so tight and small screw in rotors, I bought the tool and I said stop by and grab it, buy new for $2.00 for 8 of them just incase you may need to drill out then comes off easy once rotor off, just drill head off to rotor, take new rotor and mount on backwards to match up on size, that's on fronts and backs too but there deeper for e.b. brake inside the drum, check out to inspection on them, might need replacement next time, that can be never on rear brakes, most brakes work to 3/4's to fronts and about 1/4 to rears, why rears last 3 brake jobs for unless driving hard, or buy junk rotors, worth buying better rotors over junk ones from there cheap specials from autocheapness and replacement within 2 years of them warped and kills pads to. I learned worth $50 more on 4 wheels to spend and not touch until 50K to 75K miles later depending on how easy you drive. Great pads makes a big difference and get very little dust, once seeing more than normal on wheels, check the brakes out before wrecking rotors, can turn or if still decent and not heated marks, then depending on how long you keeping it for, if selling, just slap pads on as long the Rotors aren't bad, I bought a vehicle once with new brakes and trusted them as new rotors were good from a friend, got in a accident as abs braking worked but wasn't stopping as should from 40MPH and turned not to reared a vehicle stopped on highway around the corner and 8 vehicle's back, giving room for yourself is great but never moved up as watching me in rearview and my mirror caught the top of quarter and fender barely touched her but dented from Aluminum. Didn't break side directractional light at all, peddle did go half way down from at the top from getting it, just little over 5 months and pads were glossed over as rotors were junk to do that to pads not broken in right or bad rotors, great mechanic, so rotors junk, grooves in outer middle and inner on rotors, both sides, had just 1/4 of rotor face for braking. Then blames me I can't keep nothing nice, did a handshake that since we're great friends and you know it inside out and put new reman in 33K before, I put more money into it than I paid for it over the years and warranty items I bought, he replaced a lot and started to look at dates, either sold because MONEY PIT as I nick named it. He was always busy to fix the smallest of things like reset computer as battery didn't do it, should got money back, was back 3 weeks in row and checked my speeds and all. Now get 10mpg since I replaced the coil packs he did 13 months before, 12 months warranty. Didn't take back. Cost me for a better set and zero problems since with good ones for $200 with tax. Can sell for $325 same ones. Selling it to scrap it. Thought of putting old in an selling for $100 put only 36K and few miles over as it turned to 200K as 10 miles max. Off road parked. Can't afford it. Gave a nice ride with rear broken spring coils. So never towed light trailers as planned taking Junk to dump maybe 1,000 lbs max replaced exhaust twice and company fault, bad metal used to make it. New now with water pump. $1250 obo and has new Firestones on it 2003 Ford explorer Limited 4.6L

[@eddiearencibia606]

Hey I appreciate ur honesty and expertise on this thank you,!

[@91stealthman]

the truest statement ever from a mechanic... "less is more"!

[@peterfitzpatrick7032]

Does that also apply to the bill ? 🙄😂

[@91stealthman]

@@peterfitzpatrick7032 almost never but, that would be nice.

[@scraphaulin]

....and some is better than nothing

[@1Jomarcel]

Not about less and more here. Is about don't grease the tips of the pin

[@julesviolin]

Good point but most of the calipers we work on have open ended pins and rubber caps at the end BMW E46 etc so we fit as much grease as we can ! Recently we had a BMW 1 M3 in with really uneven pad wear on the rear from another garage. Some clown had put the pads the wrong way round !😂 The piston side pads have 2 locating pegs on back side of pads. They had put these on the opposite side of the caliper so the pads were well crooked. Whoever fitted them needs to give up spannering or go to Specsavers 🤬

[@Robinpowellsvideos]

The only reason for pin movement is for the caliper assembly to center up on the friction surfaces when there is no pressure applied and also upon release. The assembly doesnt bottom out the pins when braking is applied. Also, as the outside pad wears, the pins actually move further out of the bore. The most important thing is to clean all of the old grease out of the pin bores with a small round brush and obviously the pins themselves.

[@RBTheMechanic]

Yeah it dose move out but with jammed no clearance to begin??!!

[@DL101ca]

​​@@RBTheMechanicsorry bro but you're wrong in your thinking and just don't seem to want to admit it...a good mechanic is always willing to learn and keep an open mind.

[@RBTheMechanic]

@@DL101canot wrong check other comments I replace 3 sets of rotors prior to doing this it kept over heating rotors and wrapping them well it didn’t happne after me taking care of this

[@richardsutton01]

This is correct. I've greased 100's of pins over the last 55 years. There's no point in wasting a load of grease on the end of the pin but the pins do not bottom out, even with new pads, and will get further away from bottoming out as the brake pads wear. There is absolutely no chance that grease on the end of the pin could cause the pads to become misaligned against the disk/rotor. Richard

[@nutsnbolts76]

Respectfully,.... If clean, I don't believe these pins are so tight that the grease won't squeeze past them. When you insert greased pins, air pushes out of the hole. If it didn't, the pin would be spongy in there and push back out. As someone else mentioned, many pins also have a flat side on them. There is not hydraulic pressure on these pins. The whole caliper floats on these pins and it's a small amount of movement. If you can install pads and caliper with enough play to turn the rotor, then you are good. Hit and release the brake pedal and check the rotor again. It should turn by hand. I'm a former ASE certified mechanic and I've always put a little grease on the tip and never had any problems with it.

[@RBTheMechanic]

Ok

[@Qui-9]

I think it depends somewhat on the design of the slides. On my car the pins are flanged and inserted through the calipers through a pair of one-piece rubber through-hole tubes, sealed on both ends plus including a boot on both ends of each. Tightening the pin just clamps the edges of the boots to the caliper and the head of the pin. Too much grease? No problem, it just spits out if it has to.

[@morphius747]

superior design

[@coyoteden8111]

I wish every car was like this

[@kevinpritchard3592]

Thanks for the heads up and good looking out brother. Much appreciated.

[@RBTheMechanic]

Welcome

[@markk3652]

I go one further, I'll grease the pins, install them in the caliper bracket and move them back and forth a bit, pull them out, and spray a bit of aerokroil in the bore. Work the pins in again, it helps to liquefy the grease a little so the grease can't act like a seal not allowing the pin to move freely thru the entire bore. The outer rubber boot keeps it all in after assembly, and rust doesn't stand a chance. The combination of the grease and the aerokroil keeps it loose enough when brake heat warms it up.

[@CommentsAllowed]

I just observed this on my recent DIY brake change! I could barely get the guide pin in far enough to get the caliper mounted again. Here is what I noticed: My guide pins were mostly round. Replacement guide pins have wider and longer flat surfaces. My guide pins created a tight seal around the bottom of the guide pin boot. The rubber grommet on the end of the guide pin has channels that are suppose to let grease pass by. I way overlubricated one of the guide pins and grease exploded out of the rubber boot when forced to compress. This leaves it in suction and it doesn't want to slide out again.

[@danjensen100]

Two things to think about: First, I don't believe the fitment is tight enough to not allow the grease at the tip to be pushed back....unless you were to put an insanely huge amount of grease on the top. Second: grease is actually pretty sticky..... you'd be surprised at how much brake dust, and other debris, will end up getting stuck to it and eventually cause the pin to not slide anymore. I think cleaning the pin is better.

[@jessgvirtual5822]

moisture/salt will get to it if not greased properly...boot only prevents from dirt.

[@TheLaidbackBiker]

The pins must be greased. LIGHTLY. Don't grease them and they will eventually rust and seize. I have 50 years experience with brakes of all types. Good luck.

[@Alpejohn]

I have calipers that uses similar guide pins, and now its the fourth time they are binding.. Its good for maybe 5-6 months and then both sides are sticking. Had to pull them out while twisting them just to get them out. I dont understand how they can be that bad.. But i might had to much grease on them, i will try with less this titme. 👌But it drives me nuts and im tired of it..

[@T1000.Android]

​@@Alpejohn caliper rebuild or new calipers?

[@Alpejohn]

@@T1000.Android Probably the once that came on the car from the factory. But i might just buy new or refurboshed as they cost the double of a refurb set.. and then i need to clean them and do the work aswell.. So not sure if its worth doing the refurb my self..

[@keithnoneya]

Perfectly done! Yep I've ran into this problem myself. Thanks for sharing. Best Wishes & Blessings. Keith Noneya

[@RBTheMechanic]

Thanks, you too!

[@theyrekrnations8990]

Ive seen pins that did not slide and this causes brake issues. Primarily to have the pins sliding is the goal.

[@Russianpaintrain]

Quit useing brake grease/ caliper grease when I would not find it , missing or pretty much gone all over all , switched to Antiseize for both calibers on the cars , truck and Piper with outstanding results for darn near 50 years , very happy with the results , great video , well done !. start my neighbor spray gun oil on his trailer hubs " because they were squeaking " , a Darwin winner

[@RBTheMechanic]

Cool thank you!

[@skeletor7908]

I really had to grease my pins, when I put it back in it didn't go all the way in. I figured this was the problem. I took it back out today and there was a big glob of grease in the end. Thanks for helping me confirm this was the issue. 👍🏻

[@RBTheMechanic]

Oh yeah!!!!

[@DanielWraps]

I kept having rotors become warped because the black rubber bushing ballooned over time. I removed mine completely and new brakes don't have the problems the previous brake kit had.

[@RBTheMechanic]

Good job

[@Enpassantful]

I’m 21 years old and I have been involved in the automotive industry for the last 25 years, I can tell you now boy, as long as you grease the pins, then you are good to go, just don’t forget to reinstall new brake pads.

[@rosscampbell658]

Yes but no, there is plenty of slap between the pin and cylinder to force the excess grease out. The pin closest to the road, most prone to water damage, has the extra rubber bushing. But even that rubber bushing has ridges and not 100% tight. I thought you were going to warn against brake cleaner on the guides. The brake cleaner will swell the rubber bushing and make it near impossible to reinsert, in most cases forcing the mechanic to remove it and just add extra grease in its place. That is cheating. Here in Germany we just replace the pins, rotor, and gaskets every time we do a brake job. These parts cost nothing. A new rotor, guide pins, rubber gaskets, brake pads, is tops 200 bucks front and back. The labor cost remains the same. Nice video.

[@RBTheMechanic]

Ok

[@autobodytrainingsolutions838]

Excellent video. Right to the point and very detailed explanation. Thanks

[@RBTheMechanic]

Yup 👍

[@AlexanderLopez-kn5bt]

Wow I can’t believe I’m doing break for a long time and I never realize that but thank you so much for that tips every day we learn something new 👍👍👍

[@RBTheMechanic]

Yeah

[@Good2go6894]

Thanks for posting this video. I'll keep this tip in mind next time I replace my brake pads.

[@RBTheMechanic]

Yup also clean the bore out I have another video on that

[@sonyyoung1036]

This is a great tip. I definitely made that mistake in the past. Thanks

[@abyssalsoul6216]

Me too

[@thecappy]

Had this problem with my truck since new. Made my rear passenger brakes squeal as it sat crooked. Did the brake job myself and cleaned out a bunch of grease off one slider tip. Re-greased properly and no more squealing

[@RBTheMechanic]

Oh yeah best job doing it urself

[@thecappy]

@@RBTheMechanic definitely. I was quoted 800 per axel. Got all four rotors and pads for 800 and did it myself in a little over an hour. ‘19 F150.

[@_loois]

I've actually had this happen before where that small amount of grease at the end of the pin causes the pin to not seat in far enough. So when I went to install the caliper again, it was creating pressure causing the wheel to lock up. I was so confused trying to figure out why the wheel wasn't spinning freely when the caliper was on. Until I realized the caliper was at a slight angle from that top pin pushing out more than the bottom. That small amount of grease at the end of the pin caused an air pocket which didn't let the pin slide in far enough.

[@RBTheMechanic]

Yup u learn from experience even though lot of people don’t agree but it’s the truth and worth cleaning the bore avoid greasing on the tip and use light amount of greasing on the pin

[@DL101ca]

That's not how slider pins are designed to work. If they don't go far enough, you would not be able to mount caliper in the bracket. This is simple inexperience. You could put enough grease in there for the boots to pop(not a good idea as grease will end up on friction surfaces and water will make its way to the pins) and the caliper will still move when the piston activates.

[@CoroPlanesLLC]

I was first certified in 1993, and I can say with 100% certainty that no rule is true for all vehicles, but in this case, it is a good standard. While it may not apply to all systems, it will cause no harm to do it correctly as a good practice standard.

[@RBTheMechanic]

Yup I pay attention to this and make sure slider pin is nice and smooth this can cause rotor over heating

[@barney2633]

Being certified in the UK usually means that you are legally considered insane.😄😄

[@JohnDoe-wb9ht]

I used copper grease on top pin but found despite the so called high melting point..the grease had dried up after a year compared to the silicon grease I used on the lower pin..the result was uneven brake pad wear on the top of brake pad..also if you put to much grease on ( any grease) you'll find it creates an air lock and pin will not slide in place fully.

[@jolang8022]

Copper grease tends to clump so do not use it in breaks

[@richcombs4805]

I've had excellent results with Permatex 80653....still clean and red after ~18 months in upstate NY. Although, I generally try to inspect and clean/regrease every Fall and Spring to avoid surprises.

[@rickconstant6106]

Copper grease should not be used where it comes into contact with rubber components (such as the boots) - it will cause them to swell up, and eventually split.

[@louie4316]

Thanks for the tip, I always wondered why brake pads ware out unevenly on slider calipers.

[@RBTheMechanic]

Yup

[@emiliog.4432]

I use DuPont Molykote grease made specifically for brake caliper pins. Silicone generally doesn’t last long. Thanks. Good tip. Grease does not compress. I didn’t think of that. Very cool.

[@RBTheMechanic]

Yup good grease!

[@paladain55]

@@RBTheMechanic I tried silicone grease and a year later they were almost frozen again. No water intrusion. But I'm gonna have to try this molykote because I would like to not have to worry about this! I have a hybrid so the only brake job i ever have to do is a yearly guide pin lube lol

[@RBTheMechanic]

@@paladain55 oh yeah I will look more in to this greasing I find every grease jams up in a year or 2

[@paladain55]

@@RBTheMechanic Imagine this: My prius was on stock rear brake pads up to 180k when the guide pins finally locked up. lol The fronts have low 200k on them as i keep them greased now.

[@RBTheMechanic]

@@paladain55 wow that lotta milages!!!

[@drewdavis9657]

Been doing my own brakes for decades and have always thoroughly cleaned and dried the pins and cylinders. I grease heavily. I get like +40k miles out of a pad set. My shop serviced work vans brake jobs get only 20k miles of a pad set. We’re obviously applying different methods and a shop would likely lean in a method favorable of more frequent service intervals. Just my observations as a 42yr old DIY type of car guy

[@RBTheMechanic]

Yup I never get come back !!!

[@Hairlong1480]

Caliper pins are pulled out of the bores when brakes are applied not pushed in.

[@daveridgeway2639]

Hi RB, I totally agree! Do not use too much. Dave...

[@RBTheMechanic]

Ok !!

[@Gold63Beast]

Listen to this guy. You’ll need new rotors and a caliper within a few months when the caliper finally totally seizes up for not greasing slide pins. Extra work for him at his shop.

[@RBTheMechanic]

I didn’t say not to grease I said too much grease especially on the tip of pin

[@Gold63Beast]

@@RBTheMechanic you need a thin layer on the tip especially on the rubber grommet because of that rubber grommet. If you don’t, that rubber grommet comes off and breaks and now you have to get another slide pin. Don’t ask me how I know. But I do understand what your saying but I just don’t agree. But very informative. Every mechanic does things differently, I was just kidding. Good video man.

[@Gold63Beast]

@@RBTheMechanic also that little pocket of air includes some moisture which can be trapped there and rust it out. A thin layer of grease will prevent the moisture from corroding things. I even put a thin layer inside of the caliper piston, so that they don’t rust. But we all have our way of doing things.

[@jdwht2455]

First of all, 30 microns in the Imperial measuring system is 0.012 inches and is in reality, a pretty large dimension. I have been doing brakes for many years - actually more then 50. Disc brakes and slide pins are not a mystery. Those pins are dirt cheap in the grand scheme of a brake job and can be easily replaced and should be after many miles of use, especially if rusted or scored. I just use a good but thin dab of grease, making sure that the entire polished surface is nicely coated, The OE threads may have Loc-Tite on them, usually blue. Always a good idea IF the OE part has it. The bracket bolts also need blue Loc-Tite IF the OE parts have it as well. The video presenter IMHO used enough high temp silicone lube on the one pin for 3-4 pins - but ......

[@RBTheMechanic]

What about the dried up grease inside the bore??? Will the go away with new slider pin?

[@jdwht2455]

@@RBTheMechanic My comments weren't how to do a brake job's basic steps. Of course that cruddy old grease wont go away. It goes without saying that you should do a full caliper clean up, including the pin bores with a brake cleaner and clean rags as needed.

[@RBTheMechanic]

@@jdwht2455 yup

[@King-Arthur-The-First]

Reading these comments… ACTUALLY IM A MECHANIC BLA BLA🤣🤣

[@cherithutube]

The calipers vary in design. On my 2011 Yaris these pins screw into OPEN ended threaded hole in the casting and stop when the shoulder of the pin contacts the face of the caliper metalwork. No grease can be trapped, and there should be no loose grease anywhere that might find it's way to the disc or pads.

[@hybridssuck]

Good for that type of pin. Some pins have three flats that run the length. In that case excess grease will find its way out.

[@RBTheMechanic]

No once it dry up it blocked the end point

[@lamarw7757]

@@RBTheMechanic Silicone-based lubricants don't contain any water or oils, meaning they won't dry up for a long, long time.

[@swaggerjacker1482]

Correct. Don’t put lube on end of pin. Just on shaft. Lube/grease on end of slide pins keeps it from going in. He is right. Everyone else is wrong. Delete all other comments except mine

[@RBTheMechanic]

Yup thank you!!

[@AaronGoSoFast]

What if the guide pins have several flat sides? Doesn't that allow air and even grease to flow more freely?

[@RBTheMechanic]

Yes I will talk about that in up coming video

[@gfriedman99]

@@RBTheMechanic Now this is the kind of content I’ve been dying for on KZbin.

[@SpikeGABeen]

Good tip, RB, thanks! I'll keep it in mind when i do my brakes this year.

[@RBTheMechanic]

Yup!!

[@dbutcher84]

Anyone that has ever lubed slide pins knows there's enough clearance for excess lube to escape, otherwise the slide pins would not easily insert in the first place.

[@user-wm5wy7lg9l]

A few things ..... You have most likely installed pad retaining clips without cleaning or lubrication of underside. BIGGEST cause to brakes wearing unevenly. No pad flex no proper brake operation. Everybody and their mother knows .... lube the pins. Pins need cleaning, buffing and put pins in the right place. There is a reason one has rubber other doesn't. Cheers up here in 🇨🇦

[@bch6707]

@RB The Mechanic thanks for the important tip on this specific + crucial detail. I'm just wondering for the pins you were using a silicone based grease, in your opinion how important is it to use silicone based vs copper vs aluminum? I currently have the permatex aluminum grease. Thanks for your time.

[@RBTheMechanic]

I use silicon vase grease it works good but u don’t have to go with ut

[@riccicrozzie8204]

This is a comedy skit, right ?

[@regnarmadarang2758]

That's what I thought. The lubricant at the end of that pin also causes a vacuum. One can feel it when you slide the pin in and out. Thanks!

[@sub_second_life3174]

I just did my brakes and I was wondering why the slide pin was getting stuck halfway but you just have to pull the rubber boot down and wiggle the pin back and forth. It will seat flush. Then rotate and you’re done. I took it down the road no issues no rubbing or sticking…..yet lol

[@Bubbles12345-cat]

That little vacuum won't do anything when you tighten the pin down with a spanner! Don't listen to crap please. I've been a vehicle technician for ages bro...

[@Wayne-f7g]

Good tip but i never had any problem greasing it all for over 40 years. I clean the pin and the inside hole on caliper with Q-tips really well, then i apply new grease some inside hole and some on pin and push back and fourth in the hole until it seats nicely, I then make sure the rubber boot covers are on properly. But everything should be cleaned really well including caliper rotors and all what you can see in that area. I then spray everything with silicone spray the entire area including the struts and all, of coarse not the rotors or breaks. I then make sure there is no rust anywhere around the area and if so i scrape and then apply some grease on the rust areas to slow down the rust. Job is complete and ready to go No problems.....

[@RBTheMechanic]

Yeah I had issues I learned it hard way so this is my final conclusion and it’s worth doing this way and another video I have is to clean up inside the bore

[@davidpowell3347]

Are there a lot of kinds of grease that are labeled as being for "brake parts" but really not good for the slider pins because of making rubber swell and stick the pins so that the calipers/pads drag a bit?

[@RBTheMechanic]

It gets packed at end

[@malondc1]

Buy a grease labeled “high temperature silicone brake grease” those are safe for rubber parts

[@javierrusso375]

I've been working on my own cars for years and never knew this. Thank you.

[@RBTheMechanic]

Yup definitely this is one that can cause issue now or in long run

[@s.akinribido5894]

I’ve been wrenchn 4 decades. I love this Tip. Never too old 2 learn. Blessings 🙏🏾🫡🫱🏾‍🫲🏼

[@RBTheMechanic]

Thing thing what I show. I learned it the hard way replaced brake and rotors 3 times first 2 times rotors overheated and warped and again and I was like dmannn it then I cleaned out the grease out light amount nothing on the tip and boom car been good every since my doctor customer is happy

[@anthonyiannone7618]

not a chance that will happen , the pin has flats milled on it and the rubber has groves , both will allow grease to move freely around pin. also if you think about it the pin will literally take years to travel the length of the bore so even if there were pressure behind the pin it would certainly bleed out.

[@RBTheMechanic]

Not all have a flat spot I had experienced this issue with 2 rotors over heated warped and then I cleaned this out and put small amount on pin only been good every since lesson learned

[@keithdimaquibo4387]

I'm a fleet mechanic and I encountered this problem as well. Need to make sure that the pins are not over lubricated or it can cause the pin to not fully travel. Thanks for the great advice!

[@RBTheMechanic]

@@keithdimaquibo4387 yup I had to change rotors 2 times on a car and then thrust time it was success cuz of this

[@firdausravindar977]

A most useful snd true piece of information when greasing caliper pins. Thanks.😊😊😊

[@RBTheMechanic]

Thanks

[@firdausravindar977]

@@RBTheMechanic You are welcome. Keep it up.