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

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.

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.

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

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.

That's what I love about your RU-vid 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 !

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. 👍🏼

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

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.

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.

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!

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

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

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.

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..😊

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.

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.

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

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

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!!!

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!

@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. 😜✌️

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

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 🙂

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.

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

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

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

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

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

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?

So refreshing with non brainrot content. Really immersive.

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.

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

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

Spanish is a great idea. Cheers from Colombia south America

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

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

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.

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.

I've been waiting for this. 😁👌

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.

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

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!

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

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

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

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.

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!

Totally agree with all your methods for fixing a c

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.

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

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.

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

5:02 How I feel watching Dave explain mechanic stuff yet tune in for every vid

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.

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

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

If you vacuum test an AC and it passes, no need to waste time looking for leaks afterwards, Dave. Put the dye in and tell the customer to come back in 6 months for a quick visual.

Thanks for the update

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

YES ALEJANDRO KNOWS WHATS UP!! BRAVO!!

Fantastic job by carefully inspecting the engine first before you get into it. Save yourself a lot of hassle and headache before you further gotten into it.

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.

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

If the a/c compressor explodes, besides flushing out the lines, replacing the compressor, condenser, you should also replace the evaporator core!! Do it right not 1/2 ass😅

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

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.

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

Any shop that uses a Ferrari V12 soundtrack on its intro is classy 👍😊

Hi Dave, Colombian viewer and english speaker here! Every likes this comment gets from our latin community here, is gonna be a reason to launch the spanish/translated version of the channel ✌️

I agree with everything you said Dave, spot on.

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

Use 100% nitrogen because you may put like hairs or debris and ultimately moisture in the system

Lots of good information to keep in the aback of the head! Thank you!

I honestly can believe this situation. A few summers ago I was not able to enjoy the ac and added at least 2 cans of the refill you buy at Walmart. Eventually, it became unbearable that I had to spend $400+ for my mistake. It was so cold, I fell asleep a few weeks later and crashed 😢

Every language needs Dave’s expertise! I know some people on RU-vid use trending people from that language to do voice overs for there videos and that rack up views

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!

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

I will leave Florida for this dude

Good find

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

You can top off if you have an inspection glass on you system. If you have no money it works. However with that said you are right

Always interested videos 👍🏻👍🏻👍🏻🇬🇧

yes, great idea!

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!

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.

Mr Beast pays for actors to dub all his videos into other languages. Apparently it made an enormous increase to his viewer numbers. I think he said he makes more income from that over the english versions. Go for it! 👍

Shoot! I was looking forward to Dave’s going through that Lamborghini engine.

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

You can charge the system to a proper pressure ratio, and charge the customer for the refrigerant used. But if you need to top up the AC then it's not hermetic as it should be.

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

Those N54 engines in the 335s have common failures with all those AC lines at this age in their lives. The youngest one is 12-13 years old at this point, rode hard and put away wet. Oil leaks from the Oil Filter Housing leaks down the front, saturates the hoses and lines and just breaks everything down.

To everyone mentioning how using shop air introduces moisture into the AC system...any shop worth their weight will have a shop air system that runs a moisture removal system (refrigerated or active alunina or silica gel desiccant) so no your not introducing moisture into the system using shop air. Its going to be vaccumed out anyways but still I agree its not good to introduce. If you tried using shop air with the high humidity youd be ruining your air tools and if your doing anything related to painting than you absolutely need that air to be bone dry.

Sure, glad I subscribed to this channel

Ac weight doesn't always work. It's good to be able to read the gauges and know what a full charge looks like.

Yaaaaayyy!! Alejandro spoke🥳🥳🥳🥳🥳🥳. lol😂n I thought it was something else. 🤭

You might have forgotten to mention one step when servicing and repairing an AC system. Replace the Schrader valves.

Finally !!🤝

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.

Still winter in the Eiffel Germany!