A/C Leak Test, Repair, Recharge Part 1 - Caleb's Jeep

After the repair, the Jeep was running and then died on us and would not restart! Stay tuned for part 2 coming up next week.
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On ScannerDanner Premium I will bring you right into my classroom at Rosedale Technical College. You will find page for page lectures taken right from my book as well as exclusive classroom type case studies. What is so special about these classroom case studies? I pull live problem vehicles directly into my classroom and we troubleshoot them in real time, using and applying the theory and testing procedures we learn during the classroom lectures. There is no better on-line training of how to troubleshoot automotive electrical and electronics systems anywhere!
Disclaimer:
Due to factors beyond the control of ScannerDanner LLC, it cannot guarantee against unauthorized modifications of this information, or improper use of this information. ScannerDanner LLC assumes no liability for property damage or injury incurred as a result of any of the information contained in this video. ScannerDanner LLC recommends safe practices when working with power tools, automotive lifts, lifting tools, jack stands, electrical equipment, blunt instruments, chemicals, lubricants, or any other tools or equipment seen or implied in this video. Due to factors beyond the control of ScannerDanner LLC, no information contained in this video shall create any express or implied warranty or guarantee of any particular result. Any injury, damage or loss that may result from improper use of these tools, equipment, or the information contained in this video is the sole responsibility of the user and not ScannerDanner LLC.

[@SA-iw4ci]

The fact that you don't edit out your screw ups, mistakes or errors is awesome! Love that you keep it real!

[@marty0715yt]

Well your breathing nitrogen ever sec your alive!! We used a desiccant filter to remove the water from the air and compressed it into a tank and had almost pure nitrogen (good enough) to clean up moisture in the system. That's how they charge you a crazy amount to fill your tires with nitrogen by filtering the moisture(water) out and the O2 molecule is attached to it. What's left is essentially nitrogen. Nitrogen - 78 . Oxygen - 21 . Argon - 0.93 . Carbon dioxide - 0.04

[@andrej2321]

Common sense and tru wisdom. You’re the pinnacle of it all and troubleshooting. Also, thank you for confirming for us amateurs that sifting thru BS is the first part of getting one’s hands dirty. Much respekt. Stay rad as a radiator and then some ✌🏼

[@blake8297]

Man, my excitement of having a part on hand and being all excited just bottomed out hard. I could feel the disappointment.

[@DiversifiedMachinist]

Paul, I still learn so much from your videos. I'm a strange guy who is an aircraft experimental machinist but would rather work on cars. I've tried to explain to my kids that learning to do things on your own saves you an enormous amount of money in a lifetime. But, a guy's gotta know his limitations. Thank you for all you and Caleb do for us.

[@davidsawyer1599]

In regards to pulling a vacuum. I once worked for this A/C residential light commercial repair shop. The old guy that ran it would pull a vacuum for 8 hours. Then let it set for 24 hours. He used a low vacuum because his theory. His theory was too high of a vacuum caused turbulence and could possibly cause false readings. He never had come backs.

[@raymondprendergast5839]

Spilling the PAG oil is a common thing that happened to the best of us , but we tend to believe that it only happens to you , not a big deal. Very good update using the nitrogen. Happy father day.

[@htownblue11]

Paul was so happy when he found the new old new condenser…..the confetti was a classic touch. Hahahaha. Great step by step ac leak diagnosis and repair.

[@tjslbfyt98]

You are the only on KZbin who showed me how to use the nitrogen so far, with actual details about the tank, the regulator, the prices, and how to use them. THANK YOU SIR! May God continue to richly bless you 🙏🏾✝.

[@ScannerDanner]

Sweet! Thanks for that feedback. I had hoped that info would be helpful to others out there

[@kevinedward1234]

Paul, Caleb, great video!!!!!!!!!!!!1 Caleb the Blue Jay was fantastic!!!!

[@willispower9493]

Paul, You should come up with a caddy to carry that nitrogen bottle or strap it to something so you don't knock it over by accident and crack or break the valve. If you do you've suddenly got a missile with 2000 lbs of thrust. That bottle is considerably lighter than my K size shop bottles and probably not as prone to break the valve if it's knocked over but the risk is still there. I've used nitrogen for years to service aircraft struts and on my smoke machine too so I own 6 K size (249 CF) bottles, 2 nitrogen, 2 oxygen, 2 argon and a couple smaller ones like the one you have. I also have an adapter setup so I can fill the smaller bottles off of the big ones. Oxygen, argon and nitrogen bottles can be used horizontally (laying on their side) but not acetylene.

[@robsapplianceplus6071]

Small correction. Nitrogen as well as O2, Co2, Helium etc are 1650 psi on a full bottle

[@The_Redkween]

I’ll never miss an SD AC video. They are my favorite for some reason. Everything I know about auto AC I have learned from Paul and it has saved me and a couple of my friends a lot of money. Happy Fathers Day Paul!

[@davidostring1289]

Thank you for sharing your real life experiences.

[@angelvelasquez7086]

I just found you and I’m so thankful for your KZbin channel. I’m a visual learner and I have learned so much from your channel. Thank you brother man!!! I hope to help others as much as you have helped me!

[@ScannerDanner]

Awesome! Glad you are here with me and my son Caleb (cameraman and editor). He really makes my videos that much better these last few years

[@spelunkerd]

I really like your attitude here. As we all get older, it's seductively easy to continue doing things the way we always did them. Thinking gets calcified and inflexible. The best teachers are open to continued learning, always trying to lift themselves up to the next level.

[@kevinwiley6376]

Paul, these ac videos are the best! Thanks, began watching yesterday because, my 99 Cherokee...no ac. Gonna p.u. some gauges and get busy. And you bet I'll be checking the same spot...lol. Thanks again for the great videos. Kevin from Oregon.

[@Pablo_Automotive]

Another great Saturday thanks to you =)

[@bobdelabourer1307]

Great video, I retrofitted a tire inflator pump to the low pressure side gauge/filler line and pumped 44 psi. and with soap and water found the leak at the hose crimped at the metal line. Mind you, it was passing the vacuum test because it sucked the separated rubber back on the hose. I replaced the condenser suction hoses/lines/seals. Pressure tested again at 44 psi and passed . I vacuumed the heck out of the system and passed. Recharged the system with R134A and some pag oil. Checked for any leaks and passed. AC blowing cold for 2 weeks. Thanks for the video 🙏

[@isalmankhan1]

I started calling it Rad, since I've started watching your videos😉 Loved the video, detailed information & looking forward to the No-Start part of😉 Thanks for sharing SD, special Thanks to Caleb, you guy's are Awesome😎 Stay Safe❤

[@carlsonterrence]

Genius! The compressor test with the nitrogen (or in my case shop air) I have only seen in your videos, and I have watched many. The shop wanted $3000 plus to change the whole system on my brother in laws old pickup, and with your instruction, I fixed it for less than $100. Thanks.

[@superbestdad]

Greeeeaat lol. Already saw the “it wasn’t like that before you worked on it” comments. At least it’s an older Jeep, no start diag should be start with new crank sensor and recheck. Look forward to conclusion. It’s a very real world scenario for sure. Calling the customer and saying “I know I told you I’d have it ready by 2, i didn’t say what day”

[@PaulWattsSpringGunning]

I started pulling a vacuum overnight on A/C repairs years ago and my repairs that would come back in a year or two went to zero. We'll not zero, but it was very rare. Thanks for another great video!!!

[@robsapplianceplus6071]

If you use a micron guage, you don't have to do that and is the text book way to be sure.

[@xbin87116]

The adjustable wrench made me think of my instructor. He seen me using them and ask if I was doing plumbing.

[@todayintheshopbanksy5904]

Great one, love you guys!

[@jarrodlethborg7942]

Caleb you do a great job putting these videos together.

[@ScannerDanner]

He really does! Makes the long ones not even seem long at at right?

[@fmbfla]

Good show. One point i believe in is that a system can hold vacuum indefinitely with no signs of a leak, how ever when the system is under pressure and heat during use a substantial leak can occur. Your method of using "bone dry" Nitrogen is the spot on way to test.

[@waltersland3475]

Some fire retardants can be very corrosive to metals if not cleaned off. That was a great move checking other condenser for leak. Nothing wrong with adjustable wrenches. Not for every situation but having been a truck and heavy equipment field mechanic for 50 yrs i always carried adjustable wrench and pair of vise grips in my coveralls and done many quick fixes where time was an issue. Keep up the great work .

[@robertmedina6875]

I am right there with your Paul!! I wouldn’t change the receiver dryer unless the customer wanted it done. I’ve done hundreds of them and not change the receiver dryer!

[@robsapplianceplus6071]

I was taught to always change the drier when opening a system for repair, or if it was completely empty thus drawing in moisture on the low side.

[@lanwickum]

I used N often. Carried a bottle in my service truck. On old tractors the hard lines would rust and start to leak. 1/2 the time the N would blow the line completely out on certain models. Made it really easy to find. Scared the crap out of the customers every time. It was worth not warning them if they were standing in a safe spot. I must be getting old. Your videos bring back stories.

[@garnellwalls3721]

Great video, Thank you very much.

[@NickFromDetroit]

I worked in the HVAC field, big commercial stuff, 50 ton units. I always charged to 200 psi for a leak check. Could hear even a pin hole leak. And we used Cresent wrenches all of the time. It’s too heavy carrying all of those open end wrenches onto the roof. Oh, we also used compressed CO2 for the leak checks. It gets just as humid in Detroit as it does in Pittsburgh and we never had moisture problems.

[@michaelhenry4055]

Keep up the good work. And keep up the fun too

[@IAMNOSLEEP]

Thanks for sharing & the entertainment Paul... Cheers.

[@omdcarsandairplanes]

Definitely safety first, I had refrigerant sprayed into my eyes when stupid me depressed the schrader valve facing directly to my face. Lol. My eyesight was milky for 2 days. Learned that lesson.. 😆

[@garymallard4699]

Be careful Always wear eye and ear protection around pressurized gas or systems I used Nitrogen for motorcycle shocks....

[@georgecolbert3247]

Great real world video!

[@brianmock551]

Enjoyed joining you guys under the hood.

[@TonyNanni]

Love your videos. I learn so much from you. I will remember that hot water trick the next time I do this. I like to charge high side as a liquid after pulling the deep vacuum with the car off of course. Let the vacuum in the empty system pull as much liquid refrigerant as I can get into the high side. The hot water on the can may increase how much liquid I can get in during this stage. I wouldn't go into the low as a liquid unless it was an accumulator design with an orfice tube like GM uses. There you are just dumping into the accumulator. But most decent cars don't use such a design so I can't charge liquid low side safely. After getting all the liquid I can into the high side with the motor off I then switch to low side car running as a vapor.

[@timothymohammed919]

Happy Fathers day Paul.... thanks again for guiding us for all these years.... #evapislife

[@timothymohammed919]

I can only hope some gives you a O ring kit for fathers day lol

[@twistedwrench490]

Oh now I definitely get it Scanner Danner short for blush.t 😂😂😂😂😂. Yeah man ur the Goat love ur honestly and humility!

[@willdavenport529]

Ordered your book today. Can't wait to get my hands on it haahha. Thanks again for more quality content. I assume this book will be as important as my 10mm 1/4 socket. Use it every day.

[@ScannerDanner]

Thank you so much!

[@jimkillen1065]

I worked for a power generation company for a long time . I worked on heavy equipment there among other things. The D11 high track had a AC problem. Called out Cat and they use nitrogen as I have done in the past there . I think the charged to 300 or 350 . I it sure makes finding the leak a lot easier.

[@rickrogers2649]

Now THIS is reality TV, not like the phony stuff on cable. Thank you for posting and looking forward to the follow up. Happy Father's day !

[@ScannerDanner]

Or the phoney stuff from other big name auto repair channels, the ones with millions of subs. Thanks!

[@rickrogers2649]

@@ScannerDanner Amen Paul !!

[@oneida80100]

Thanks for being real.

[@jessemask1260]

One thing I was taught is to run the vehicle while vacuuming the a/c system. Water boils at 70-80° under vacuum. Some of the flush chemicals boil at 400° at atmosphere. If the system is at 220°, there can't be any moisture inside the a/c system. Also turning the compressor on its nose with oil in it will lubricate the front seal, after sitting on a shelf the seal can be dry. Rarely have a comeback.

[@JAYJAYJAY53]

Just a quick tip or is there a time frame on that trick ?

[@ann-marienewbound9402]

Customer “It was running fine until you worked on the AC system”.

[@ScannerDanner]

right? How can you possibly explain this in a way that the customer would believe you? Wait until you see what it was! It had ZERO to do with anything we did with the AC. It is the nature of what we do sometimes right?

[@cristianojoana1898]

Paul , its real unfair but trade is like this... and costumers hardly believes..

[@tommysmith9847]

@@cristianojoana1898 I have been there. It's normally better just to fix the problem and "eat the bill for extra work" than to charge for it. The good will pays for itself. It takes years to earn a solid reputation but you can ruin one overnight!

[@bobl78]

remember when one of Eric O´s customers came back and blamed his bad air for his rusted through rims leaking.. Eric put some air in 3 days earlier

[@coyotekelly7143]

The one I hate, is when the customer says his cheap walmart led lights are not working right after I changed his oil and spark plugs.

[@rickl6697]

In 1973 I learned to recharge my 65 mustang that had an aftermarket underdash a/c(R12) and I had a robinair vacuum pump and whenever I had to vacuum it down I would lay a 100 watt incandescent trouble light next to the receiver/dryer to heat it up while evacuating the moisture out of the system and never had a problem with moisture in the system.

[@2005Pilot]

I’ve heard of using a heat gun or hair dryer

[@throttlebottle5906]

the newer "non-mineral" oils (poe/pag) are far more hygroscopic and will mix with moisture, in comparison to old mineral oils which wouldn't mix with water. they've modified the oils to be less hygroscopic, but still they'll just carry the schmutz around the system while it eats itself.

[@patbfd]

Happy Father’s Day Paul!!

[@cdars1]

following from Barbados bro keep up the good work

[@romanboev3571]

Great video, looking forward to no start video 👍

[@jimmyraythomason1]

As the owner of a 1987 Jeep Cherokee, I feel your pain. NOTHING is a simple repair of one of those! Every little problem seems to lead to an even bigger problem.

[@JimmyMakingitwork]

Had a customer the other day come in for a spring A/C check, wanted us to make sure it was ready for summer. It was blowing 34 degrees….I asked the front desk about it and they said, what are the pressures, did you not test the system. I attempted to explain the potential problems with tapping into the schraders, for no reason, but to no avail. How would you handle that? Open your own shop? lol

[@anthonysova7117]

Hi Happy Father’s Day Glad u made the call to use nitrogen by the way get in the habit to always purging the center hose on ur gauges Hi Caleb fantastic vids CHEERS

[@SmittySmithsonite]

Oh man, that's my luck right there - right at the end of a A/C job, and now we have to troubleshoot ignition or crank sensor failure! Always fun explaining that to a customer ... and it's usually the new customer that just got ripped off from the guy down the road, too. That sucks about that 4 month old condenser you had kicking around for years. I wonder if that fire extinguisher material is corrosive - it may have become so in the presence of moisture. Not sure. I always though it was, but can't recall where I heard that. More useful comment tips for you: Get yourself a bottle of Nylog for o-rings - that stuff is AWESOME. We call it liquid snot, because it's super tacky / sticky. :D I had an o-ring coated with Nylog on a incorrect accumulator for my '93 Volvo 940, and it held pressure for a WEEK! There was ZERO tension on the o-ring! I could pull the aluminum line in and out of the fitting 3/8 of an inch! That's how awesome that stuff is. I did have to mourn the loss of my R12, though - that was painful. I think there's a few different kinds of Nylog IF I remember right - I got the BLUE lettering on the bottle. I've had the same bottle for 6 years, and I've done 20+ complete overhauls in that time. Great stuff as usual Paul and Caleb - you guys always make me laugh! I needed it today - I've got a migrane from a '12 Silverado with an EVAP SMALL LEAK!!! GRRRR!! All I can smell now is baby oil from my home built smoke machine in a paint can, HAHAHA!

[@jmt1611]

Knipex 00 20 06 US2 Pliers Set would be a great addition to your arsenal.

[@Mr2004MCSS]

Another great video. I just ordered the valve for the nitrogen tank. My fiancé's dad had a 40 cu/ft tank of Argon that still feels like it has quite a bit in it that he gave me today. The only issue is that the tank is fairly old so it would have to be tested before it could be used as a trade in because the date is expired. The AC in my 92 Cavalier recently quit so I need to find the leak as it's not that obvious. The compressor and hoses are fairly new and don't appear to be leaking though some of the hose connections at the drier look kind of oily.

[@Mr2004MCSS]

I worked on the AC on my 92 Cavalier the other day and could not find a leak anywhere on all of the connections and components I could access. I couldn't get to the evaporator behind the dash. I used Dawn dish soap and water in a spray bottle. The system still had about 15 psi in it and this was from the repair I did in August of 2019 when I replaced the lines from the compressor to the condenser and accumulator. I used the Argon tank and regulator to pressurize the system to 200 psi and let it sit for over an hour without the needle dropping at all. I then vacuumed down the system for 30 minutes and then let that sit for 30 minutes with no loss of pressure. It must be a very small leak. I still have a large tank of R12 so I recharged it to specs and it blows nice and cold. I did discover that my blower mower had quit so I had to replace it to get everything working correctly. I guess I need to get an AC sniffer to put up the drain to see if I can detect a leak at the evaporator.

[@slickrick343]

Danner what makes you the hoarder is the fact you kept the broken part of Calebs jeep 😂😂 . But seriously great content as always man. I use your vids to educate my colleagues in the way it should be done!

[@gregoryfairchild2460]

I love these videos. Love pur trade. So many ways to attack stuff. Love diverse idras

[@gregoryfairchild2460]

I love when things go wrong bc we learn more

[@richardmitchell7836]

Made me feel good 👍 just like some of my days go. Real life brother and I find myself laughing about it as well, why get angry! Waste of energy. Happy fathers day.

[@ScannerDanner]

to you too my friend!

[@LynxStarAuto]

@12:25 a great test to check compressor integrity. Another important test to run is make sure the fan(s) operate properly along with the compressor. Many condenser fans will not come on, if the system charge is too low. Seen that routinely misdiagnosed.

[@michaelkennedy2528]

Happy Father's day to all that it applies too. If your not sure, reap the benefits of it anyway, it could be yours lol

[@eduardoyepez7358]

Best comment ever 😂

[@fasttoby]

87

[@billyyoder8171]

Thank you Dos Danners. D3, Happy Dad's Day Danners.

[@simonilett998]

First time I've caught a Premiere from you guys. 1am Sunday morning here, so no excuse not to stay up to watch. Great job as always Paul + Caleb. Thanks for the effort you both go to for us all out here in Y.T and SD.P land👍🇦🇺

[@ScannerDanner]

Thanks for joining us Simon!

[@simonilett998]

@@ScannerDanner Always appreciate, look forward to + watch all of your vids as a high priority Paul. Thank-you (and to Caleb and Jim too) Also, even though you have the amazing gift of time travel (since part 3 was posted 1 month into the future 7/7/2021..lol) I'm still looking forward to part 4 of the 2011 Ford Escape Parasitic Drain series (If you had any luck with closure on it..P.I.T.A that one must have been)🤯🤣

[@ScannerDanner]

@@simonilett998 lol, we must have time travelled. Just sent that to my webmaster to fix. Thanks! Should have part 4 up soon. We are actually still working on it smh

[@DanWallis86]

@@simonilett998 are you in Perth also?

[@simonilett998]

@@DanWallis86 Yeh mate, sure am. Best city in the world bro🤣👍🇦🇺

[@Jpilgrim30]

At work I usually use o-rings out of our service kit and save the bags of o-rings that come in new compressor kits to keep at the house for times like this. I have TONS of different o-rings in packages under my tool cart at home. I’m a bit of a hoarder when it comes to tools and parts as well.

[@pouchy400]

Great work camera man

[@camarobossman]

Mannnnn cant believe it turned into a no start. Let the Jeep saga continue!!!!!

[@simonilett998]

@Caleb Danner Happy 1st Father's Day mate...Many more fun times to come🤣

[@JD-526]

If you look at where these condensers leak are usually where the batteries are. It takes just a little acid from the battery either from the inside of the battery or someone cleaning the terminals, and placing the wire brush right over the area where the leak happened. because the acid powder that got cleaned off the terminals fell or got deflected off the brush and made its way to the area where you found the leak. This happen to me. A little moisture will accelerate that corrosion.

[@Jangus]

Ok I need to adopt this method

[@JAYJAYJAY53]

I agree with using air . Every expert wants to make any repair as costly as possible because they have skin in the game .

[@takauchinishika4701]

Hey Dan the dad, you should order Oring from Denso, R134a and R12 orings are pretty much uses in any car, Myself like to order a box each size of 100pcs for like RM20 about 5-6 bucks. And, if system uses r134a, but you had r12 orings, Use 2 of them to keep a seal and it work fine

[@bartscave]

I wondered about Bernie from ATS using CO2 and his sniffer/foam system for ac systems. CO2 has a lot of moisture.

[@daletuott4545]

I would put system under full vacuum then do the bleed down test right away and if it passes, I would continue to vacuum system ( valves open), if it didn't pass I wouldn't waist that 45 -50 mins vacuuming a leaky system (this took a few leaky systems to learn this). I would start the engine and close the hood down to raise under hood temps to help boil any moisture in the A/C system out. Under vacuum moisture boils out at ambient temps, raise the system (under hood) temps the moisture better.

[@ScannerDanner]

did I not do that on this one? definitely a mistake on my part, thanks for pointing that out to others

[@Th3R4k]

When using nitrogen for leak detection, i use the pressure regulator for adjusting test pressure, and keep all valves open exept the one in the bottle. Now if there is a leak, the bottle pressure gauge will fall down before other gauges will show any movement. Volume between regulator and bottle valve is so small that pressure in there drops if there`s even small flow in to the ac-system. Because sensivity, you have to let the pressure stabilize for a moment after flow is stopped before closing bottle valve. Regulator quality may cause some variation, testing will tell how it works.

[@kevinhitchcock7062]

If you put the Freon on the center hose before you release the nitrogen out the Freon on the yellow hose and after the nitrogen is done start the Freon and purge a little Freon through the hose. Not a lot just to keep air out. Just a suggestion.

[@gregoryfairchild2460]

There are additives to neutralize acids from moisture and used it for 20 years too. I don't do enough ac to invest in nitrogen right now.

[@wesouderkirk9079]

charge the sys. with propain and use a lighter too check for leaks.

[@ScannerDanner]

lol

[@20somthingrealestate]

Pressure test before vacuum - you're large leaks will be apparent and could pull in contaminants. Also that last nitrogen sweep will purge the system.

[@laszynandriy]

You proved why I hoard parts too lol

[@SA-iw4ci]

The air quotes applied is appropriate because you didn't replace the drier. 🤣 Just giving a hard time SD. Once again....great video! 👍👍🤘 "Tobacco"?

[@ScannerDanner]

Lol, yes, just tobacco. Now if it was my jar, you'd have to question it. For Caleb, not so much 😉

[@sheeshalready]

After watching Bernie, and already owning a CO2 tank, it will be CO2 at about 200 psi. Nice video, guys!

[@Joe_Brown99]

I’m a welder and have my weld tanks like that. I “buy” them and just swap them out. It’s ver convenient and relatively less expensive than renting the bottle

[@TonyNanni]

also, you should throttle the liquid in when you clear the service hose of liquid when you are all done. Best practice to avoid problems.

[@ThacMan]

I still have a driver door for a 1998 Jeep XJ in my shop and I haven't owned an XJ in about 10 years.

[@frederickburns1739]

Hey Paul, Here's a tip for the internet cop's. When they point a finger they have three pointing at themselves. They point fingers because they done the same thing.

[@kevincalvert7084]

Lol. As long as you use a good vacuum pump before a charge it’s fine. Never had a issue with shop air. Especially with a drier.

[@robsapplianceplus6071]

I own a residential appliance company. My recommendation on pressure to leak check should be based on what the low side can handle..., it does not get that full 300 psi from the high side after shut down, it "averages out" and you get closer to 150 psi or less. The aluminum braze connections to copper are not designed to handle that much pressure. I've seen them blow apart an evaporator putting in too much pressure. That's also part of the reason why your low side guage doesn't go that high and would get destroyed if you put too high a pressure through it. 100 pai is plenty to pressure check. I used injected dye and a little refrigerant when I did commercial refrigeration and found the leak with a special light.

[@ScannerDanner]

For sure, I need to be careful with these pressures. And I agree that the EVAP won't see 300, but I can see it hitting 150-200 on a 110 degree day when parked on the hot pavement in Arizona with your windows up. What do you think the in car temp would be? Then how hot is the pavement and is the engine hot or not. I really feel like 200 wouldn't do damage. Thoughts? My other thought is I've seen many EVAP cores and they are constructed not much differently than the condenser and the condenser can certainly handle that pressure

[@robhill8894]

@@ScannerDanner The evaporator is usually made out of aluminum. The condenser usually made out of steel. I use 100 to 150 psi max and is plenty to do the job. Also, as he mentioned, and confirming what I said, the higher pressure damaged his low side guage.

[@ScannerDanner]

@@robhill8894 not on our cars my friend. Condenser is aluminum and so it the evap core. Not sure I've ever seen a steel condenser to be honest.

[@PTBob721]

Great videos - can't wait for warmer weather in Buffalo to work on my ac system! Any reason not to use my argon/co2 mix from my mig welder setup to pressure test? I know nitrogen is typical but I've got the argon/co2 already on hand.

[@shauno3697]

You lit me right up on your DIY rant about 16 minutes in. I can't touch R134 in the shop, as a technician, in Wisconsin, without 609 Certification. Yet anybody can go to a parts store in Wisconsin and buy a can of future problems with a spash of R134 and leak half of it out into the atmosphere when they try to figure out how to fill it in the parking lot. Then let the other half leak out of their AC system normally for the summer.

[@mph5896]

609 cert is a joke. Take an online test and pay a couple bucks and you are certified for life.

[@stuzman52]

Hey Shaun! It's a pretty easy test where it's open book and only costs $20. Here is a link if you're interested. www.rses.org/EPA609.aspx

[@shauno3697]

@@stuzman52 I'm actually good to go. As a matter of fact, I had to update my 609 cert all over again after they came out with R1234YF. I'd love to see R1234 sold at parts stores these days. Considering it currently costs well over $10 an ounce to automotive shops, it would be hilarious to watch people leaking a super expensive can of that all over the place in an AutoZone parking lot.

[@mattt4183]

@@shauno3697 You can buy R1234YF in cans. Autozone website shows it $45 for 8oz. So shops might be billing the stuff at $10 an ounce but shouldn't be paying anywhere near that for it.

[@shauno3697]

​@@mattt4183 Our cost at my last shop was somewhere around $13 an ounce for the R1234YF. That's before markup. I've been out of the auto repair trade for the last year, but I've talked with a couple other friends still in the biz who say the price is still about the same. I'll tell them about the AutoZone price though.

[@TonyNanni]

Paul, I wouldn't trust that check valve when you break vacuum or when you switch cans. The hot setup for that is a ball valve on the end of your yellow hose. When you break the vacuum that check valve will allow air to suck in. Also when you switch cans the ball valve is your friend. On the purge of air you did when you switched cans, you need to purge at the adapter fitting for the can not at the manifold. That purge you did did not get the air out from that can adapter. Last thing, you need to weigh your cans on a food scale before and after to total up the charge going into the system. If you do it right, you can get a more accurate charge than a commercial machine.

[@olenaerhardt7725]

@3:09 What I can't understand about those concerns on pressurizing w/air of empty system is the following: If the AC system is empty due to a leak, the air is in the system anyway, so adding more shouldn't matter. Especially, if we vacuum out moisture after that w/vacuum pump.

[@gilbertabad5121]

Maybe you guys can use some of those nitrogen for your tires. Nitrogen molecule is larger and cooler than oxygen so it doesn't leak out easily and is good for long drives and prevents tire heating.

[@7milemechanic706]

I made a fitting for using compressed air by cutting the top off a refrigerant can and j b welding a fitting to the other side that I can couple my air hose onto it and screw the works onto my can tap Something to keep in mind is most do it yourselfers trying to save money aren't driving brand new Cadillacs they are trying to keep tired high milers running for a few more years

[@staceymodisette1149]

Be glad there are no motor windings with electrical going through it. You have acids that would burn out new compressor. I'm a retired hvac instructor plus 33 years in field how's the KZbin bud sorry? You helped me out a lot and with my 97 k 1500 . Hell with the old refrigerant pressures were getting pricey for a while would check for leak. With a budget a cool tool is a amprobe brand ultrasonic leak detector you can also buy emitter for inside car for finding leaks when driver hears a window etc. To much press for just hoses will leak you find auto hoses as well an manifold gauges. So you got a unfound I'm leak ch hoses by putting high visibility hvac soap in hand and run down all hoses. Hell i put a direct drop in a electricians car new refrigerant I think 404a.automotive systems have variable speed compressors. Most new compressors in auto also use aluminum in the compromise case BLOW BACK BOTH WAYS WITH THE NITROGEN REMOVINNG METERING DEVICE AND POP IT WITH A GLOVE OR RAG. STOP LEAK STOPS UP METERING DEVICES. HELL YOUT RIGHT ON MOST OF INTELLIGECE ON WEB HOLLER IF YOU HAVE A GREAT DAY. HAVE TO SAY SEEN MECHANICS PRESSURIZE UP A OLD FREON JUG FOR A AIR TANK HOWEVER AIR TANKS COME WITH COATINGS INSIDE CHANCES BEING IRONY IT R WOULD EXPLODE ON ME WATER IN COMPRESSED AIR IN HURRY

[@nandor690]

Yea, I only use a micron gauge when I “think” I’m finished for the final check before I add the refrigerant

[@staceymodisette1149]

Everytime oil drier nitrogen triple evacuation. On car put a squirrel 🐿️ cage fan blowing toward for simulating going down road. We used to get extra long hoses put ref. Jug in car and therm. In vent hell I got too much

[@bobo11112222]

Have u tried accutrack ultrasonic? I am a believer now. It works great. Wished I tried it earlier in career. Noise when dry rushing noise but when a bubble solution (leak reactant solution) noise changes to distinctive popping noise. Leak creates bubbles & as bubbles pop you can hear the popping like "tick tick".

[@2005Pilot]

Aaaaawwwwweeeeeee Maaaaaaaaannnnnn....... ROFLMAO!!!! “It’s now a No Start Video”. Ya Killin Meeee.. LOL. I really enjoy your videos that you & Caleb produce. I learn alot and get some kicks too! Thanks again!! 👍👍. I’m troubleshooting AC stuff on my vehicle presently too & y’all are Helping me 👍👍

[@ScannerDanner]

thank you my friend

[@ThomasMills-dk7mi]

Thats how my repairs usually go!

[@mikeakridge6555]

The vacuum pump will pull every bit of water out of the system. Mixed with oil makes no difference. Lay the nitrogen bottle down so that it cannot fall and turn into a rocket when the gauges break off.