Lamborghini Engine Update & How to Properly Service Your A/C

[@RZ_Earthworx]

Came here for lambo engine update, and i found the Air Conditioning information so interesting and educational that i had totally forgotten about the lambo engine by the time they had rolled it out.

[@chichomilian9070]

😂

[@duncevans]

Me, too

[@Defied_-vw2jz]

riight

[@tamatirogerson6421]

Yea same here 😸👨‍🔧

[@TheLesporter]

I hope the technicians that work at Daves auto know how lucky they are, because Dave does know how lucky he is for having them. Great channel Dave.

[@Don-vi5if]

Make sure to check for a bad motor mount when an A/C line cracks/breaks. Those lines dont usually break unless it flexes beyond its design. Love your channel and wish I had worked with you when I was in the industry.

[@DavesAutoCenterCenterville]

Great point!

[@tilescape]

I used to have a GMC Typhoon and when an engine mount went bad enough it would tug on the heater hose and eventually break the heater core. Those are no fun to change.

[@luketc1]

@@DavesAutoCenterCentervillecondition cause!

[@gsgcarreviews]

Yep I own a e92 and the trans cooler line blew

[@neologicspasms]

Old Army helicopter mechanic here. I just came across your channel for the first time with the first part of the Lambo engine. Made my way to this video, and although I didn't learn much, they way you describe things to the viewer, is just mesmerizing and goes to show just how awesome you are!

[@_Wingman]

That's what I love about your KZbin videos, Honesty and Integrity ! I spent my whole life teaching myself a lot of what you show in your videos and I " Love " how you and your team make it all look so easy. I learn something new every time I watch one . I have always worked on my own vehicles because I don't trust Anybody else , but I would let you and your guys work on them . Thanks for all the great videos dude !

[@DavesAutoCenterCenterville]

Love that!

[@beverlyboys73]

Ditto...

[@bm7760]

Same here. I just don't trust anybody to do it 'right'. I'm fussy, slow and precise. But I'm also an amateur learning as I go and even after decades still learn something new with each job.

[@djosbun]

Getting all of your team members involved in your business ideas (like the Spanish-version of the website) makes them feel like they matter more than by just being a technician. 👍🏼

[@DavesAutoCenterCenterville]

Thanks for the comment. I will never be able to grow my business if I do not encourage my employees to grow. They are a talented group

[@InsideOfMyOwnMind]

​@@DavesAutoCenterCenterville I have worked for companies that would just trash on your ideas just because it wasn't theirs. In fact I'm about to fire one of those employers this month.

[@Freddy_Confetti]

@@DavesAutoCenterCentervilletf you mean you don’t like to turn rotors are all. Trying to make ppl buy shyt they don’t need

[@tedfaraday5940]

@@Freddy_Confetti I don't think you heard him right. Go back and listen and who knows you might figure out what he said.

[@TwoFourFixate]

@@InsideOfMyOwnMind In fact I'm about to fire one of those employers this month. - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - ¿Do you know if they read the comments on Dave's videos?

[@castrosbullykennel7385]

This is what you call a REAL MECHANIC not a part swapper Great job & even better channel

[@TamagoHead]

We used to call ricers parts-slippers.

[@brianjensen6724]

As a retired auto technician with over 40 years in the business one of my biggest pet peeves is when all refrigerants are called freon, freon was Dupont corps trade name for r12 refrigerant. R134a is not freon its a total different compound. Aside from that the information was spot on

[@latemnf]

It rolls off the tongue a little easier than tetrafluoroethane.

[@PMcKay00]

@@brianjensen6724 R12 was magic stuff. High performance with low pressures, and it was cheap. Unfortunately it was really good at punching holes in the ozone layer though.. Propane works as a refrigerant too. Had a customer that used to top up his own systems on the farm. Not great when you blow a hose in the engine bay, but it didn't happen to him.

[@brianjensen6724]

My employer actually ended up in court due to another tech using the word freon in his description of an ac repair as well as in the parts listing. The customer had their compressor fail and claimed it was due to the wrong refrigerant being used in the system. The court ruled against my employer as there was no way after it had been repaired at another shop to prove otherwise.

[@StrongerThanBigfoot]

@@brianjensen6724Did the tech get fired

[@brianjensen6724]

@@StrongerThanBigfoot he left before the court case

[@jake4030]

Dave! I watch your videos all the time. I manage a large retail business that has an auto shop as well. I’m not mechanically inclined whatsoever, but watching your videos has helped tremendously. I have to deal with many issues at our Service Desk, so your videos are just a bank of knowledge and expertise. I would happily pay money for this kind of content!!!

[@DavesAutoCenterCenterville]

That is awesome!

[@carlosbarraza3291]

Yes to that Spanish version I’m a Mexican American speak and I know Dave will have more benefit for his shop out there! Hay k hacer buen trabajado Alejandro!

[@weldingjunkie]

You mean your American that speaks Spanish? Don’t devalue yourself. You’re just as important as everyone else. When you became a citizens you’re an American now. We all have ethnic backgrounds.

[@rickwoods5384]

​@weldingjunkie indeed but in America we speak English

[@simpson3048]

if Dave wants to reach or understand some of Mexicans, try some of Cantiflas work, humor and satire is priceless to understanding where their culture comes from. -from just some guy.

[@ztaples]

​@@rickwoods5384 we speak what ever we want. USA does not have any official language dont be ignorant.

[@weldingjunkie]

@@rickwoods5384 you think so? You’re stuck in the 60’s then. My mother law is Guatemalan and they speak Spanish and English however for technical terms it’s very difficult from them to comprehend the same way. You best learn Spanish because it’s coming. It’s not just Irish anymore.

[@usamaalsulaimi8486]

We need more of you Dave.. we need more Daves around the world.. good job 👍🏽

[@daniellehouse4119]

Agreed 💯

[@goodgat266]

So refreshing with non brainrot content. Really immersive.

[@obsoleteprofessor2034]

Re engine cooler: I used to work on airplanes. We had a forest service twin Beech come in with a hole in a piston. The shop recommend the engine be pulled but the owner wanted just the piston replaced. The shop did the work on the condition someone else sign it off. It had aluminum all the way up to the oil pressure line to the gauge and plugged it up. We blew the line out and got the gauge to work. We pulled the oil cooler, flushing out tons of trash, took pictures, etc to cover our butt. They brought a guy who didn't even look at the airplane and pencil whipped the repair. 2 years later that engine quit as they were fire spotting in the deep mountains, crashing and everyone got killed. Experience has shown that anytime a failure like that happens, metal/trash goes all over the place and is just a failure waiting to happen. There is no way to clean out an oil cooler nor an a/c condenser/evaporator so all parts have to be replaced.

[@nevillegoddard4966]

@@obsoleteprofessor2034 Oh no! I'd have just refused to have anything to do with that job. Point blank. There'd be no way on earth I'd put a finger to it. Surely there were air safety standards back then ffs? But I guess, if its privately owned, they all go out the window, so to speak. What a dreadful story. That's ruined my day now.

[@stevensko9153]

God have mercy

[@DieselWorld]

Before pulling a vacuum on a system that is obviously leaking, you should pressure test it with nitrogen and use an ultrasonic tester to pinpoint a leak. Systems often will pass a vacuum test but fail a pressure test. You can also add a bit of refrigerant to the nitrogen and use the sniffer tester if you don't have an ultrasonic one.

[@nevillegoddard4966]

@@DieselWorld Yeah you're right mate! Just cos a thing can hold pressure, doesn't mean it can hold vacuum! BAD call Dave! We had a HELL of a time with a vaccum-operated system & had to get a very expensive little s.s.VACUUM-rated adjustable tap before the system would stop leaking vacuum! There's a whole different design philosophy involved in sealing a vac system. Some fool put the pistons in backwards on a lambo engine rebuild? You're kidding? That's cheap-ass negligence! Unexcuseable on any engine! - Let alone a lambo engine! SMFH! Great work spotting that!

[@robertpsotka3525]

​@@nevillegoddard4966the guy didn't know what the arrows were for

[@nevillegoddard4966]

@@robertpsotka3525 Lol yeah! Probly illiterate too! How foolish huh? Perhaps he should have asked someone or read up on them? - or at least looked at the pictures in the manual, instead of ignoring the arrows & ploughing through the job so he could go home early. Another engine is gonna cost 20, 30, $40k? So much for a bargain? Poor stupid guy has paid a high price for his youthful haste in buying this expensive hunk of junk. The car yard he bought the car from is a crook, & the guy who rebuilt, or who wrecked this engine should be flipping burgers & burning fries.

[@joshua.sutherland]

So, you're upset about the order he did things in? He basically said they're going to run both tests.

[@kennygee2715]

Correct, a vacuum is only about -14psi where the system is much higher than that, can be well over 250 on the high side.

[@joeblow5037]

2002 Trailblazer 246K Stopped blowing cold air last summer Bought a Sub-Zero synthetic refrigerant (the one with the meter) at the Auto-Zone. (this summer) This is supposed to have some additives to lubricate and seal. worked like a champ, and the meter is gold it was low low (it is 22 years old after all) and the compressor was cycling on and off. I carry that empty can (with the meter) and a spare (cheaper and without the meter) around with me. no need to use it yet. And we've had quite a few 100 degree days here in OKC. I've got mabee $60 invested so far. I understand where you are coming from, Dave......but if you have just a little mechanical knowledge, there are other options than shops that charge $125 an hour. Thanks for what you do 🙂

[@gsabella4]

similar situation with my 08 Forester, put one can of sub-zero in and it's good to go now. Ice cold in 95 degree days. I know there's a proper way, and I'd want to go that route with a Lambo, for my ole Subie, i'm ok

[@ScullyBrewing]

I see nothing wrong with charging ac provided people use the proper high and low side gauges. You can rent them for free from oreillys, theres no reason not to. The low side gauges you get only tell you half the story. Also, im wary of products that have sealant in them. Ive seen a lot of gummed up ac lines and orifice tubes after people have used r134a that had additives. Most of the time they didnt even have a leak, just picked the cheapest can off the shelf that happened to have additives.

[@ihavethedocuments2580]

It's called CYA. David is 💯 for a shop owner

[@elmayimbe_the_amateur_mechanic]

working on a customers car in the underground garage. Guy next to me has his 2012 535i with the hood up looking around. I ask him what is going on. He says his AC is warm and he has the fancy R134 can with the gauge. Showed him how to hook it up and use it in a few minutes. Went back to my job and 5 minutes later he said he was done. He went in the car and it was ice cold. I told him give me the rest of the can so I can do mine later 😂😂😂

[@joeblow5037]

@@elmayimbe_the_amateur_mechanic lol 😂

[@kakeetoalex9924]

It helps a whole lot when you supervise the function of a system you know and understand. It brings a certain level of respect and efficiency from your technical team. Good stuff Dave..😊

[@PMcKay00]

Emptying the system of refrigerant and then putting in the correct amount is certainly good practice, but for a long time was completely unnecessary. With earlier systems that ran on R-12, most receiver/driers had a sight glass (and sometimes there was a separate sight glass in the line) and you could see if there was liquid refrigerant passing to the TX valve (thermal expansion valve mounted just upstream of the evaporator core). Bubbles or milky looking fluid told you that more refrigerant was needed. It's great if you can fix every leak, but many systems will only leak slightly over winter, and you will struggle to find where. It was often the case that the simplest 'fix' was to slightly top up the system. If you had to add a lot of refrigerant, then commonsense told you to look for a leak. Big leaks are easy to find. If it won't even hold a vacuum (like in the video) then it would generally be very easy to find a leak. You could probably even hear it. For a slow leak, which most leaks are, they can hold a vacuum for days (even though the system if designed to hold pressure not a vacuum). UV dye can help, but for a small leak it has to be in there for a fair while so that there is enough time to actually get some dye running out. The best way to stop or reduce leaks is to regularly use the A/C through winter so everything is lubricated and seals don't dry out. With climate control systems the A/C is probably going to be used even in winter, but in the good old days, people would rarely turn it on. The sightglass was only one way to determine how charged the system was. An experienced person could tell from the pressures and temperatures if a system needed refrigerant or not. A bit like cooking a steak - time gives you an idea, texture gives you another, as does sticking a thermometer in. In those days, there was no recovery equipment either, so you were dumping refrigerant if you want to open the system. When R-134a started to be used it was both illegal to dump refrigerant, but it was also a way of saving money to recover it. R-12 was the best performer, and it was cheap. R-134a had to have a lot higher pressures to give the same performance, and higher pressures meant higher temperatures. So on hot days you started running into high pressure problems of blown hoses and things. It's been a long time since I worked on automotive A/C systems, but the basics don't change.

[@greg03811]

When refrigerant gets removed and weighed using shop equipment, can that process potentially introduce contamination to the next car’s ac system? Or is fresh refrigerant always added to your car after this weighing process?

[@PMcKay00]

@@greg03811 anything is possible, but most recovery machines will have a pretty good filter. So if your refrigerant was removed and then put back in, it might be cleaner than it was. Some recovery machines also had a 'recycling' function where they would circulate refrigerant through their large filter. I wouldn't be too concerned about having your system emptied and then refilled with either new or cleaned refrigerant.

[@rafmatt1607]

​@@PMcKay00don't forget that newer vehicles will use the ac once defrost is turned on. Great points 👍

[@callonrebual551]

You're right on the 80 % nitrogen concentration in our air, but you push all the humidity of your shop into the system as well. Using pure nitrogen helps to dry out the system further, since nitrogen is considered hygroscopic. Thinking of your dryer cartridge, if you wouldnt change it it could be half full just by using that procedure. Thanks for all the knowledge you spread, keep it up Dave!

[@kkmfc3s]

On top of that , another reason for nitrogen only, is the oxygen, R1234fy is an A2L refrigerant, and a lot of R12 substitutes are hydrocarbon based, Oxygen + pressure + flammable , you can figure out the rest.

[@DukeofSeastone]

Usually most all shop air systems (at least ones that are in decent shops worth going to) will have a moisture removal system (refrigerated or desiccant- active alumina or silica sometimes both) any shop running expensive equipment makes way more sense to not cheap out and if your doing anything related to painting than its an absolute must.

[@callonrebual551]

@@DukeofSeastone right again, but I would argue that you're not drying that air to a 100%. Why not just do it the right way and be 100% safe, you're not taking any chances with nitrogen.

[@DukeofSeastone]

@@callonrebual551 Well I suppose that it could be due to the cost of nitrogen systems (either ones that produce it from the air or getting it delivered) are prohibitively expensive versus the cost that you can make off customers with it. I honestly have no idea how much a pure nitro system costs...so other than for perhaps filling tires (which honeslty for the vast majority of people are totally not necessary...as stated 80% of the air is already) and maybe fire suppression systems lol? It would seem that just using good quality dried shop air is perfectly fine so to even drag out the nitro system if you have one may not make sense in the time sense as you got to remember most repairs are being done on a timed basis vs cost reimbursement...

[@kkmfc3s]

@@DukeofSeastone a tank of nitrogen is like 30 bucks and you could probably do 30 plus cars with one tank. Does he have air luber on his shop air? He is giving this out as advice to people who probably dont have dryers as well. Also their shop air will never hit the pressure testing requirements for proper leak check, typically 250 psi. I've been a refrigeration mechanic for 32 years, everything about a/c in this video is for the most part bad advice and nonsense except for the clean the dirt out of your condenser part.

[@ojbarberena7090]

Spanish is a great idea. Cheers from Colombia south America

[@anotherhuman8211]

Dave is doing what EPA 609 actually says you HAVE to do

[@Mbuckxx]

That's Dave and Alahondro great team and awesome advice as always

[@yamfingaz5598]

😂

[@claytondavis384]

Thank you Dave I hate when people or my boss want to just top off a system I never do that always just recover and recharge but never heard anybody actually say that it's bad love learning from your videos I find myself using things I get from your channel all the time at work

[@bendangwatipongen1932]

Sir, stumbled upon your channel only last night, wish I had done so years & years back and that we had workshops with people like you, your team & facilities here too, your logic about the AC System is just Wow. Keep up the Good Work. Above All The Knowledge that You & Your Team are Sharing is Priceless, God Bless You, Love & Regards from Kohima, Nagaland, India

[@shanesouza4303]

@Dave, your a good man and teacher. Many pplz facing what seems like large bills to them, will be looking at these videos to learn that every part has gotten expensive and their mechanics are actually pretty decent pplz. A reference point if you will. Great Job if your not hearing it from anyone else but your wife. 😜✌️

[@Paul37Ontario]

AC problems, look guys, if your a home DIY, this is what you do (please read to the end) 9/10 times your just low on refrigerant. You'll need 1. AC refrigerant can (of the right type) with a pressure dial (Auto parts store) 2. AC pressure gauges (Amazon) 3. Temp to AC pressure high low chart (Google) 4. Ambient Temperature gauge (I use my digital thermostat in my garage open to outside. Now go to chart and write down high and low side pressures according to outside ambient temp. now hock up low side to your bottle (a little purging here) and the high side to your high side on your AC gauges, run the car and add Refrigerant until your high side are in the range of your # you got from the chart. Obviously if you have no pressure to begin with you got bigger problems, but you already tapped the low side valve to see if you have pressure right, your a DIY guy that knows not to do this step with no pressure right. (If you have $$ go to a AC garage and there going to say $400-4000, 9/10 Especially BMW, they'll say you need a new evaporator etc. Happened to me Twice and read on forums that its there money maker) But your a DIY guy. So Yes look for leaks, clean condenser, all what is in this vid is great, etc. But like I said it's usually just a little low.

[@nickd.4512]

Very good info. Too many people dont realize that some systems in their vehicles just simply need a complete overhaul when parts start going bad

[@ralfsautomotive]

Finally someone else saying it about "topping off" AC Systems. Also gauges don't tell you much either, there are too many variables.

[@jkramer4716]

Yes, yes, and yes on how to properly service your AC! Good job Dave, good job!

[@jo-johaithcote4486]

Ford's are the worst about black death. Never had luck flushing a condensor. Always get a new one. Smitty's Tire @Auto. Shelbyville Tn. Family owned since 1964. Love your shop. I work with my dad and son everyday at our shop just like you guys. Awsome

[@stanjacklin5968]

Totally agree with all your methods for fixing a c

[@benjaminjordan2762]

Working on reefer units, which is all an a/c system is, I go by the pressures on the gages. I also use shop air because when you pull the vacuum on the system simply pull for an extra 15 minutes. This will completely remove all moisture in the system including the receiver/dryer.

[@rafmatt1607]

Yeah, no. The dryer dessicant is saturated. Should be replaced if exposed to air.

[@panagiotispsomas5611]

You must change the filter dryer because you used air not nitrogen!! Air contains moisture and oxides that contaminates the dryer and the oil from the system so you actually have to change filter dryer AND oil! Also when I do vacuum i use micron gauge on the evap coil in carrier and thermo-king reefers you can use the EPR valve service port to check your microns!! Note: If you pressurize the system you must use anhydrous nitrogen with 99,7% purity

[@ronaldinabinet7750]

It's impressive that you mentioned using a micron gauge to pull down the system! Dave could get one to pull a super vacuum on his repairs!​@@panagiotispsomas5611

[@panagiotispsomas5611]

@ronaldinabinet7750 I'm trying to do my best for my customers I had repaired a lot of aged systems made in 90's and it works fine because I take care of the system!!

[@faulmannpictures]

Man, we have nothing like this here in Tacoma, Wa. A shop and owner that doesn’t accept anything less than perfection and honesty with the customer. I’m about ready to ship my Frontier down there for a maintenance session.

[@Sixpointtwoliter]

sounds like Dave was doing his best not to say that young kid killed that engine, but that that young kid killed that engine

[@shaolinfist8323]

From what I remember, that young kid was repairing the engine he hadn't done anything to it

[@mrgreen4688]

hard to say. the kid claimed he hadn’t done anything. it’s possible he got it after someone else screwed it up.

[@Mcivstx]

If i remember correctly the whole situation was sketchy. The car was dropped off at that young guy’s shop for some powersteering work and maintenance by a dealership working as a middleman. Then after the car comes back to the young guy’s shop for engine trouble and eventually the engine ends up Dave’s. I have a feeling the dealership sold a clearly problematic car. Found a little shop that couldn’t handle the work to dump the problem on and blame.

[@zildog]

I don't think he did. I think he was handed a rotten lemon and got in way over his head but I don't believe he built the motor - just thought buying a used oil pump was going to fix it. The internals are deffo FUBAR and he had no idea, I'm pretty sure.

[@gunztommiegunz]

@@shaolinfist8323 he said he just changed the oil but people can screw up changing oil

[@CheerySlows]

First time I’ve heard someone say that topping off an AC system with refrigerant is a bad idea. And coming from Dave I know he’s got some good reasons for it. Glad I haven’t done it to my car yet and will never do it going forward now. Thanks Dave!

[@Doggythunder]

I really shouldn’t get so excited for these videos when I drive a 2021 Honda Accord but here I am! 😂

[@rdgtv203]

Its gonna be a while before you start having car problems. Got a 2017 honda pilot 195k miles still running like new.

[@kamaboko1]

"Toooooooast!" All that Lambo engine needs now is a little butter.

[@DavesAutoCenterCenterville]

😂

[@glenndower2513]

Agreed as the engine is already jammed up. I love to hear what the other shop has to say about your findings Dave. BTW, just came across your site a day ago and subscribed to your channel after seeing your 3rd video.

[@derek04151]

That kid just became a scapegoat. That was a Frankenmotor right off the lot.

[@AdrianPardini]

Here we fix trucks with banana peels, I'm pretty sure you'll manage to get it back to running state with butter.

[@heyinway]

@@DavesAutoCenterCenterville Daily Driven Exotics in Comptpn, CA can hook them up with Lambo engine gurus to repair that block/engine.

[@richardr.5177]

Lots of speculation. I hope we learn more about this case, but we have no sight on this engine anymore when it leaves Dave auto center. Maybe the guys are willing for the other shop will post an update in this channel. But again a great video. Shared knowledge like this is pure Gold.

[@Im-a-machine]

Spanish? Sounds like a great idea. Because you're providing better customer service than your competitors. More customers, word spreads, keeps building your business!

[@davisdeen-ty4so]

My New FAVORITE channel 🎉

[@DasAutoz]

I love your channel Dave! I came across it recently and I’ve been subscribed ever since. Gear heads alike, Sending love from Florida!

[@aygwm]

Dave you’re a master of explaining things. Also, your video editor is a beast.

[@0num4]

It's all just "signal flow" from one component to another. In IT/telecom, we test step by step from one end point (or a central hub) to another. If one thing checks out, move to the next item until you find the source of the problem! Thanks Dave & co. Excellent as always.

[@dannyhoward1646]

These are great videos for being an apprentice mechanic always learning something new!

[@DavesAutoCenterCenterville]

Glad you like them!

[@TamagoHead]

Amazed that worked on it w/o referral. Glad you got a deposit to protect your business.

[@c0mplex564]

Thank you Dave and the team for giving us these updates! Keep em coming!

[@DavesAutoCenterCenterville]

Our pleasure!

[@GustavoLopez-eh4pt]

Una versión en español de este canal sería algo genial! Buenisima idea Alejandro. Dave, I think Alejandro has a very good idea to reach a greater audience. Hope it becomes a reality!

[@MsFireboy2]

Great idea to make a site in Espanol. Also when I was working on an A/C system and the Compressor failed an A/C system flush was not an option.

[@notmyproblem6432]

Your comment about the A/C and flow made a light bulb click for next time! Last week my rad fan ceased taking the fuse with it overheating my car. For the last month. I noticed my a/c only worked while moving at highway speeds but would be ambient temp at idle I thought it was just low on R134 but after the fan finally giving out if I maybe inspected my car earlier and not assumed I would have caught it before failure. Thanks for all the great experience you share.

[@jamesmesnard9902]

Hey Dave I do commercial HVAC work, I would not use shop air. Oil (refrigerant has oil obviously) oxygen and pressure can create combustion that’s the main reason we avoid doing that. Also because it will put moisture in the unit increasing vacuum time (I know you know this) but great seeing you doing the right thing and finding and repairing the leak. I wish every shop was as thorough as you and your guys and as knowledgeable

[@Trustworthy_traitor]

Dave, I'm watching your channel from Romania! You are an encyclopedia of knowledge. People can learn a lot from you about engines and repairs in general. Thank you for sharing the knowledge.

[@DavesAutoCenterCenterville]

Hello Romania 👍

[@steveo6034]

Great idea by Alejandro!! Theres a lot of Spanish speakers who love cars and motors so a spanish language website would do great I bet!

[@nevillegoddard4966]

My hearing aint the best, but I didn't even hear him say the word - 'Spanish'.

[@eduardoyepez7358]

100 percent Dave! Expand! We Latinos love us some deisel Motors! I know many people who would love to watch your videos

[@GodsLoyalLaborer]

God Bless you and your team Dave. What a wonderful atmosphere and fellowship you have going on. ❤

[@cwhitty05]

BMWs are famous for the schrader valves leaking. If I remember correctly there is a line that runs along the firewall that also leaks. It’s been over 10 years since I’ve touched one, so I can’t remember for sure, but I remember changing more than a few of them, and dozens of schrader valves.

[@mr2_mike]

Yup. You nailed it.

[@weswest8666]

Had to do one on my BMW, still leaked (somewhere else) but I added a can of stop leak and it’s been over 1 years now, AC is still cold!

[@Google_Is_Evil]

All brands have this, when they have an air conditioning system installed. Maybe BMWs valves are even worse, but it is a common problem and valves should always be replaced when the airconditioning is being serviced and there is a moment when the system is not pressurized.

[@camaroblackmatte]

yep mine too, e84 2010

[@chappy2121]

Not just BMWs. Those type of valves all leak, commercial, industrial etc. Its not if, it's when.

[@xarups]

I was wondering what happened to that lambo engine. Too bad you guys didn't even touch it. Would be lovely to see that thing rebuilt.

[@mrgreen4688]

it’s just an audi motor

[@LoneWolfSparty]

​@@mrgreen4688kind of. It has some interesting tweaks that the Audi engine wouldn't have.

[@nevillegoddard4966]

@@xarups Very sad. That jewel of an engine had been abused by a$$hole renters, then rebuilt by a halfa$$ed monkey with a socket set. It was never gonna survive.

[@tredaviousbowser7931]

Spend my yearly salary on rebuilding it🤣

[@johntaylor1947]

Once I bought a awd. van with a rod Knock. The previous owner had the failed trans. replaced then the engine developed the knock. The cause of it all was debris between the radiator and the condenser over heating both the engine and the trans.

[@montagne8820]

I have a question, why do they do the AC systems by weight of the gas? Wouldn't it make more sense to measure the pressure of the system when it is filled with said "1.3lbs" or however much? That way you don't drain and just top it off at the "full" pressure.

[@brnmcc01]

A lot of systems use some type of thermostatic expansion valve, which regulates the flow of refrigerant. There's too many variables to go by just pressures alone. The pressures rise/fall depending on the total system load (outdoor ambient dry bulb air temp, evap wet bulb entering air temp), compressor (engine) RPM, fan speed, dirty cabin air filter, recirc on or off, leaking blend doors, the list is endless. If the system has a fixed orifice tube like the Yukon, then you can get a close charge by charging based on superheat, for a TXV or expansion block system you can get close by charging to subcooling, but the best method is make sure the system is leak free, and free of contaminents etc, pull a good vacuum, and weight in the exact factory charge.

[@HONDATECH93]

Man I was interested in seeing them putting work into that lamborghini engine

[@olduhfguy]

That's definitely a job he is right to walk away from. Too many fingers have been stuck in that pie. 😞

[@nevillegoddard4966]

@@HONDATECH93 Ooh yeah I was gettin ready to see that! Now I'm disappointed; that would've been SIIICK!

[@jkng4606]

Boat anchor most likely

[@nevillegoddard4966]

@@jkng4606 Yeah it's rooted! What a shame! Glad Dave never did a thing with it.

[@alexshepherd]

Yes it’s a let-down, makes you realise how awful it is to own one of those cars - now it can’t be fixed, what’s the owner supposed to do with it? Find another engine at some huge cost? If they’re going to be considered disposable, you might as well have a battery pack and an electric motor instead, same performance and probably a longer life before someone decides not to fix the battery

[@anonymous..-]

Sometimes the shade tree fix is all people can afford. I’ve worked in low income areas and had to cut corners all of the time to keep within budget. I didn’t put them in danger, but I did ensure they were able to get to work and take care of their family.

[@stevengabalis4986]

Yep, folks that take their vehicle to a shop like Dave's deserve top notch, no shortcuts service because that's what they're paying for. My AC fix on my 13 year old vehicle is a $10 can of R134a once a year from the parts store. It does not deplete the ozone layer, yes it's a greenhouse gas, but so is the CO2 used for soft drinks. The hundreds (thousands?) of dollars to have Dave service and repair my problem is just not in my budget.

[@oneilbrissett4854]

Your a good boss Dave love the way you communicate with them and still been hand on in you shop.

[@samd7601]

Crazy with all your experience there are still things that suprise you. Amazing!

[@dandiner845]

excellent work Dave explaining this to people... I sorta want to have this on repeat at my shop for when customers come in and I say the exact same thing and then they say, oh why so much for just filling it with gas hahahahaha!!!! I always go into detail like you but sometimes they dont give you a chance to tell them everything.

[@michaelroden7823]

Go for it Dave. Spanish or what ever. I watch and LEARN from South Australia.

[@OffGridInvestor]

Spanish is pretty easy after a while. I'm in Victoria and a Colombian joined the family so I started to learn.

[@mitch6313]

It's an internal combustion ENGINE not a MOTOR guys. Its like nails on a chalk board everytime! But I do enjoy the hard work you put into your content and that's a bad ass shop you have there!

[@teelowteelow356]

Cringe

[@theundergroundlairofthesqu9261]

Dave's en Espanol is a great idea! Lots of techs here and many countries to our south would be interested.

[@DavesAutoCenterCenterville]

Appreciate you taking the time to give us feedback👍

[@rykdheiner]

Evaporator core, there is a tsb for the evaporator, if it’s low and you can’t find a leak at the condenser or lines condemn the evaporator

[@fastinradfordable]

Um no Use a sniffer. There. Is. No. Assume.

[@LoneWolfSparty]

​@@fastinradfordableoccasionally a sniffer can lead you down a rabbit hole if you aren't careful; experience helps a lot with a/c work.

[@Matthew-ou2ie]

@@fastinradfordable Especially considering how much work the evap replacement is on a car like that. Likely the whole dash needs to come out. Could be a 20 hour job.

[@rykdheiner]

@@fastinradfordable that specific chassis of BMW was known for bad. evaporator. cores. so yes check tsb’s before anything else. I’ve seen technicians with 500$+ sniffers not be able to detect a slow leak on a BMW evaporator. In this case yes there was a line leaking. . . .

[@rykdheiner]

@@Matthew-ou2ie it’s a 10hr job

[@TheRaymiltier]

Dave seems like a great person with a solid point of view, yes in for a spanish website!

[@richardvervoorn6626]

Dave, if there is any way for you to impart your work philosophy, techniques and attitude for others (especially younger mechanics) it will service the entire industry well because we’ve all been mistreated by shops only in it for the money. However your methods will ensure repeat customers, so everyone wins when you spread the word the right way !

[@gibson5056]

YES ALEJANDRO KNOWS WHATS UP!! BRAVO!!

[@abobobilly]

Hey Dave, i really wish we had knowledgeable people like you in Dubai. There's a serious lack of quality mechanics here.

[@ZMAN_420]

Ford Super Duty radiator and all other coolers are always clogged in Chicago Area. Great Content👍🏻🇺🇲

[@6996brandyl]

I think that's a great ideal to also have it in Spanish I can tell he's real happy working for you

[@gtp1500]

Cmon Dave, if I’ve got a small leak I hardly think topping off my A/C especially if you have a gauge is damaging my system… Sometimes we’ve got to do what we’ve got to do!

[@maverick12916]

You're gonna get air in the system regardless if you don't evac and recharge with a machine.

[@John_Lee_]

that's your choice on your own car. He has a business and does things the right way.

[@verne5770]

Super Dave's Engine shop. Mind Blowing Education

[@JRH460]

Dave is probably the only honest mechanic in the United States... I would bet money on it..

[@greentriumph1643]

Dave is great! But there are other. One mile from my house: The JAM Shop Auto Repair

[@robertpsotka3525]

You r fucked up

[@73NF14Ret]

No, there are others but you have to be very discerning and check out their reviews.

[@greentriumph1643]

@@73NF14Ret Best to meet them.

[@ruxoneto6560]

No there are honest shops all over you just have to find one !! & there are some customers shops should just fire 😢. My brother has a friend she wrecked her p/u body shop fixed she was pissed said shop did a terrible job , i asked to see she lifts hood shows me wheer the fender was painted & shop realigned fender after being painted there was a small spot where bolt was that now has no paint ( she was mad about that , after she left shop i told my brother don't ever volunteer me to work on her truck 😂!!

[@Sakdy]

Thank you this is great, I started my quarter in ac and heating/engine repair and I’m gonna show this to my class this video!

[@Joshuabryabt-gf6sc]

Not every shop can do motors like you guys ❤

[@jburk8600]

Having 41 years in automotive parts, we required the purchase of an accumulator/orifice tube with any a/c compressor or there was no warranty on the compressor. The number of shops that would refuse to purchase the required parts was astounding. Guess what shops were never given a referral when a consumer asked where should I take my car for service?

[@gordie4059]

Sometimes leaks will only show up under pressure or vacuum. I find the majority of vacuum tests pass with our Robinaire machine. You put in a charge and hear the hissing. I told my boss to get a Nitrogen tank for testing leaks under pressure and go around with soapy water spraying lines, fittings etc. It’s dumb throwing a charge in it, hearing the hissing, and having to evacuate the system again and losing the Freon. Stuff ain’t cheap! $50/lb here in Canada for R134a & $100/lb for R1234yf

[@manuelsalas4324]

What a great explanation of how it works and why, appreciate you guys 👍

[@DavesAutoCenterCenterville]

Our pleasure!

[@johnathanreigard512]

Dave’s got a great team and that’s a fact

[@chriscuellar5107]

Absolutely love your informative content sir!!!! HOUSTON TEXAS IN THE BUILDING… looking to have you guys look at my truck one day… god willing and god bless!!! Keep informing the people!! Very interesting

[@blockhead3654]

Nitrogen is also dried. So when you pressurize the system you dont introduce any water in to the system. Shop air is full of moisture. So if using it you better change the dryer and hold that vacume extra long. Might not be a good idea to show diyers the shop air trick.

[@briggsquantum]

I predicted all this in my comment on the first Lambo video. Those little boys will learn a few things - one it's better to start your career repairing Hondas and Chevs and Toyotas and get some experience that way, and two not accepting esoteric engines of any brand thinking you'll be a "Lambo" or "Ferrari" mechanic. Three they'll learn they won't get paid for this little adventure. Dave might get paid for the diagnosis, but as he is one of the good guys he may very well forgo that invoice and let the kids off easy.

[@derek04151]

He'll nullify the bill just to get rid of that hunk of junk and have no record of it ever being anywhere near his shop. That kid is looking to drag another shop into his "oh sh!t" moment.

[@LoneWolfSparty]

If you're going to start down that road of working on Lambos; you need to start on VW/Audi, work your way up to Porsche, THEN you'll have the knowledge and existing to work on Lambos. Learning how VW does things is invaluable when working on those cars; they aren't terrible to work on, but they are quite a bit different compared to the domestics and Japanese makes.

[@DavesAutoCenterCenterville]

Thanks for watching the Lambo saga👍

[@connorjohnson4402]

@@LoneWolfSparty yea if you watched the first video that's basically exactly what he did and he said they usually work on porsches. They didn't really mention any other Lamborghinis or Ferraris tho so I'm guessing this might've been one of the firsts and probably their last.

[@LoneWolfSparty]

@@connorjohnson4402 they must not get too involved with Porsche stuff, because some of the stuff seen on that engine is commonly seen on Porsche

[@robsierra516]

Go for it! Spanish edition. This could really help with car maintenance

[@vulture4117]

curious about the AMG engine with the cracked driveshaft - what ended up happening to that?

[@marvelaturraz5405]

Dave, I think you should try shooting a vid with Alejandro about some basic mechanical issue. I think it would work if you speak a sentence or two at a time, and he immediately translates to Spanish. If you two can coordinate and be very connected with each other, and keep the flow going with legato speech, it would be very effective as well as pleasant to watch and engage with. It's a dance between you two, so it may take a while to develop that, but I already see the respect you both have for each other, so it definitely will happen if you both understand that you are exchanging focus, working as a unit together, and presenting smoothly in digestible bits. (So probably speaking no more than 2 sentences at a time might be your general norm.). You can scale this up to the most complex issues, of course, once you get your process down pat. And of course, a great rapport as friends is the way to go, not stilted or robotic in any way. That probably goes without saying. Here is a vid I found about legato speech. (Legato is opposite of staccato.) It explains that aspect better than I can. Good luck!!

[@briansmith2616]

Tech I used to work with replaced a blown-up compressor in a Prelude without replacing or flushing anything else. It lasted less than 10 minutes before it started knocking. I was a young tech then and his poor decision taught me a valuable lesson.

[@24theMoney]

Thanks for the Lambo update..bummer, hopefully the engine becomes a nice winter project for someone. Unfortunately, most people can't afford proper AC service on their cars including me. I am guilty of topping off the AC with part store "mystery" refrigerant. Dave knows this is reality in this economy.

[@2ndRangerB]

What Dave says is solid information anyone can gas and go It will work. but to do it right and expect long term reliability the extra work is warranted. 33 years industrial and commercial refrigeration tech speaking

[@zildog]

Hot damn that Lambo V10 is all sorts of fucked up... Young dude got in WAY over his head!!! Whoever rebuilt that engine should have his tools confiscated.

[@ProfessorDeezNutz]

looks like a Samcrac special. "This is how I rebuilt a lambo engine with 2 bottles of MMO and atf" . . .😁

[@waynehanshue712]

I really wish your shop And your staff were in Michigan. Awesome work

[@detonationpyrotechnics4156]

2 ways to charge any unit be it car or building. After pulling your vac down to 29 inches of mercury you can weigh your charge for cars etc and if for some reason you don’t have a scale use the 30 degrees above ambient temperature on your gauges for your correct pressure

[@TeneTsTaroT]

The lambo got the “trust me bro” rebuild 😅, the A/C discussion was great btw!

[@pepperjackshack2439]

yeah its usually the hot side high pressure line that fails where the metal fitting meets the rubber hose. The high pressure mixed with heat causes a lot issues, every time ive fixed friends AC that was where it happens.

[@brianh6272]

Dave can make Alajandro even more rich by allowing him to do a spanish KZbin channel. Good for him 👌

[@robert3910]

A Spanish version of Dave’s would definitely boost views… make sure Alejandro gets a little bit of the revenue. Great work.

[@cheeseo9798]

What boroscope do you guys use? I think I found the right brand but I’m not sure what model. The picture quality is insane as well as taking pictures and videos I can show customers along with documenting for records.

[@thunderstop]

Lets do it!! Yes to the spanish version of your channel!!

[@billsmith3042]

wow.... my car kept overheating with AC on (09 corolla 217k miles), tried the can from store, added some, gauge was in green, still overheating. Took it to Firestone for full service, only had .3 lbs of refrigerant lol. After purge/refill service, AC works perfect and no more overheating.

[@RussellBooth1977]

My 5.7 litre Chevrolet LS1 V8 engine had a scuff mark on the cylinder wall as the Lamborghini engine does except in cylinder number 6 when I pulled the cylinder heads off to do a hydraulic lifter replacement back in 2018, but I just bolted the cylinder heads back on after doing the lifter replacement & it has been running fine ever since. It does have some piston slap on startup when the engine is cold which I am told is normal for these engines which have a short piston skirt design & cast eutectic pistons which expands as the engine heats up. It goes away a few seconds after driving the car, I believe it's because once oil gets splashed up into the cylinder walls the engine becomes quieter. So I just decided to bolt the cylinder heads back on & run it until it does begin to burn an excessive amount of oil !