Flushing the evaporator in your automotive car truck suv jeep van A C HVAC AC A/C R4 System
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- เผยแพร่เมื่อ 9 ส.ค. 2020
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. See more videos about this how to install an R4 style automotive AC Delco GM Chevrolet HVAC AC A/C air conditioning compressor, including the washers and inserts. I am no expert. This is just what i learned from a couple of weeks of googling and whatnot.
This info is helpful for many makes and models. But I am working on my 1990 Chevrolet C K 1500 Truck. Here is the full playlist. More videos coming. This process is the same for many vehicles though. I MIGHT be able to help you if you have questions. But I am no expert. I just did this one huge project. lol
Where to buy
Vacuum system kit amzn.to/33Rowfk
R4 Compressor Sealing Washer Set and Inserts amzn.to/3kCwlLF
Nylog Blue amzn.to/3iwjCZb
A/C Power Clean & Flush amzn.to/30Nx6Kd
90-Degree Circlip Pliers amzn.to/2Ci1jHJ
AC Delco Refrigerant Oil amzn.to/2XR6oOS
AC Delco Orifice Tube (make sure this is correct for your application) amzn.to/2DZsZl5
Universal AC System O-Ring Kit amzn.to/33RbL4k
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Finally a video that corresponds with my 1988 Silverado! Its frustrating to enter a search with a specific year and everything else comes up!
I have several videos about this truck on both of my TH-cam channels. check out the playlist you will see at the end of any of these videos relating to this truck
Thank you.
Here's a full playlist on this project and others involving this truck th-cam.com/play/PLVsdJzatTm_VLjk-TM6KIqExDrJF5L-bX.html
Thanks
Got many more videos about this subject here th-cam.com/play/PL_5XjPVEw3swRL4ED9AhsynAgZsuXDzZm.html
I have much less air flow coming out of evaporator when trying to blow air through. Is a slight restriction normal? I feel like 50 psi going in and 20 psi returning. Thanks for your help.
What you see in the video is what is normal.
Here are more videos about this truck that might help you th-cam.com/play/PL_5XjPVEw3swhfNY5J-6NRjMMUW5fupgK.html
What does it mean if air won’t go into the top (bigger) pipe on the firewall. I can blow air through the bottom one, but not the top. Even then it doesn’t flow freely. It’s under pressure
Well it means there is a blockage somewhere. Seriously, I recommend you let a professional do this job. I will never do it again. And I have been working on my own vehicles for more than 25 years.
What did you figure out?
I have to do the same thing to my OBS Chevy but I keep reading that I should not flush the evap while it's still in the truck but I'm not dropping the dash! I hope this method gets all of the flush out of the evaporator so that it doesn't mess up my new compressor.
As you see in all of my videos about this project it worked fantastic.
Cleaning the system has nothing to do with damaging the compressor or not. There are a ton more things to be concerned with...look at all of my videos a out this project.
@@HorsepowerHouse20 Cool. Can the condensers in these be flushed or are they those kind that have small channels that can't be flushed and the entire condenser has to be replaced?
@@MiamiWebDesign If your system is very old I highly recommend you replace everything in the engine bay relating to HVAC. But seriously, I recommend you just pay a shop to do it. Because this job is NOT easy. So many tools you need (not common tools), so many parts and trial and error etc etc. Just take it to a shop and pay the money. (I'm serious.)
I am a good home mechanic and this job pretty much kicked my ass. I will never do it again on another car. Just being serious with you.
@@HorsepowerHouse20 Trust me I hear ya as I'm seeing as I go along with this project but this is something that my old man and I are doing almost as a project/hobby thing that we like to do together on this old truck.
We started by swapping out the expansion valve in the rear of theTahoe and we got the rear ac to finally cool but not cool enough so we're going to do the rest of the system now. I think i've already spent more on parts and tools than a shop would've charged to do the entire job but it's cool I'm always looking for things that we can do together to this truck and I'll always have the memories with the old man that's pushing 80 now :)
I have a 1990 454SS and I'm having a problem finding new hoses for the ac all I can find is the discharge hose. The manifold hose assembly I can't find and I don't know if the one for the 350 will work the original hoses on the truck look good so I don't know if I should flush them and reuse them or not
Flush them. All hoses are out there to purchase though. Look harder.
Here are more videos about this truck that might help you th-cam.com/play/PL_5XjPVEw3swhfNY5J-6NRjMMUW5fupgK.html
Hello, the inlet you flushed was the low side inlet correct?
This was an older vehicle with a retrofitted R134a system. It was originally R12. Those evaporators could be flushed in the reverse direction of flow. So you flush it from the smaller diameter hose or line (discharge) out through the bigger diameter hose or line (suction).
Now if your vehicle has an evaporator for a R134a system, those evaporators should never be flushed. As the coils are so tiny, some of the flushing agent will stay behind. It could be hazardous to your health to breathe that air.
Could you let us know more about your air compressors you use it’s so quiet!
amzn.to/3IGP1Xq
Nothing fancy. But gets it done.
I’m servicing the a/c system on my ‘05 Subaru Outback which has over 200K miles on it. I’m doing a similar job to what you did here. But I have some doubts.. Is it ideal/realistic to properly and thoroughly flush a parallel flow evaporator core? I ask this because they are just like condensers, with very tiny fin holes, almost impossible for the solvent to reach all areas of it. I’ve been told it’s just best to replace it, but it’s obviously very time consuming to replace an evaporator core since the whole dash needs to be removed.. Also, do you back flush or forward flush? I’m concerned of leaving solvent inside the evaporator. Thanks in advance.
No fluid will be left in it after you properly vacuum out the system to test for leaks. just do a thorough rinse, and then vacuum with your proper device.
@@HorsepowerHouse20Great to hear. Will do. Thanks!
Personally, I will never do this task again (replacing components). And I always insist on working on my own vehicles. But working on an air conditioning system in a car is just too much to deal with. The special tools you have to have, the knowledge, the equipment, it's just too much. Unless you're doing this often, it's best to just let a professional shop that you trust handle the job. Just being honest with you.
@@HorsepowerHouse20 I hear you. I too am an experienced DIYer. I want to give it a try as I have everything I need now to do this service. a/c repairs are not cheap either. As always, I will be following the service manual on my car. Thank you.
Did you get the AC in this truck up and running after the flush?
Oh this was a complete a/c system replacement project. And it was not easy. But it turned out great. See link th-cam.com/play/PL_5XjPVEw3swRL4ED9AhsynAgZsuXDzZm.html
Does not evaporate quickly and the product I used that was in the same can was a different color...
Here are more videos about this truck that might help you th-cam.com/play/PL_5XjPVEw3swhfNY5J-6NRjMMUW5fupgK.html
What psi with the compressor hose? Thanks.
Doesn't matter. Just blow air.
Here are more videos about this truck that might help you th-cam.com/play/PL_5XjPVEw3swhfNY5J-6NRjMMUW5fupgK.html
Did you add any pag oil to the coil after flushing
No
You run Oil through the entire system. Not just one component.
I did this today and it was a pain in the ass. Kinda "easy", but a complete pain in the ass. Feels super sketchy the whole time you're doing it. Hopefully it winds up working for me. New compressor, dryer, condenser, and I will get a new compressor line soon since I realize while flushing it I should probably replace it since the little in line muffler cannot be flushed.
Now the difficult part begins: finding someone to charge it.
Replace ALL of it. Or you will wish you did later. And make sure you check for leaks using a vacuum device. Or just take it to a shop once you get to that point. I will never do a project like that again though. It's just too much. I will take it to a professional next time.
How did your project turn out? I am faced with this due to a seized compressor. I don’t want to replace the evaporator, but am willing to do the rest. One problem for me is that my minivan has rear A/C - and more components.
Why do you say you will never do it again what went wrong?
Because it is a shitty complicated task that needs to be left to a professional. Try it and you will see.
The “pros” are charging around $750-$1100 to do this !
Please donate here. I know there are no videos like this anywhere on TH-cam. paypal.me/horsepowerhouse
We have more videos about this subject here th-cam.com/play/PL_5XjPVEw3swRL4ED9AhsynAgZsuXDzZm.html
Here is Part 2 th-cam.com/video/azI-5qKmK3Y/w-d-xo.html
For those of you who think you can be a hero and replace your entire A/C system yourself - SURE - it can be done - but I highly DO NOT recommend the average guy attempt it. It's just too much to deal with. Too many ways to screw up. Too many new tools and devices to get. Too much STUFF to figure out. You will spend more than a week (or a month) trying to do it. I SERIOUSLY recommend you to just take your car to a shop or an independent mechanic or qualified mobile mechanic and let them handle it. PAY THE MONEY AND SAVE YOUR LIFE! (And I have been working on my own vehicles for more than 25 years...)
So pretty much pull down our pants and bend over and just take it, let the ac guys over charge us. Screw it, even though what they charge equates a down payment on a car.
Sad but true...😮
If you're a reasonably competent mechanic replacing the compressor, the condenser, and the lines is pretty straight forward (depending on your car's model, some are easier than others).
Replacing the evaporator is generally impossible because it usually means taking apart nearly your entire dashboard interior.
That's also why you need to make sure that your air compressor is not set higher than 30 psi when flushing the evaporator, lest you blow a hole in it.
A car that's 10 years old is perfectly drivable, but paying a shop to replace the entire AC system will cost more than the car's worth..
@HailAnts I've done all that on different car models,many times. And it's not easy, definitely not a task for a beginner, or a novice for that matter, ac systems are not complicated, its just tedious getting to some of components. First time i changed a compressor was almost my last time working on cars, i rounded out 2 of the mouth boots, took me 4 days to get out of that jam
I'm not a mechanic I just like working on cars, I like it so much that i thought of quiting my job as a mechanical engineer to be a mechanic
I’d like to respectfully disagree with you. Fixing an AC is not the work of gods that is forbidden to mere mortals that the internet will lead you to believe it is. I’m no professional but I would consider myself fairly mechanically inclined. I have a Honda Element that had a bad AC compressor. I had 2 different shops quote me $1200 to replace it. There was absolutely no way that I was going to pay that. The only thing I had professionally done was an evacuation of the system, and that cost $50. For $400 dollars I got all the parts and fluids needed to replace the condenser, dryer, and compressor. I did my research and watched plenty of TH-cam videos. I flushed the evap using this method. Almost all of the tools required I already had, and I think most people who are hobby mechanics probably also have them. The only tool I had to purchase was the vacuum pump and gauges. I was able to get those in a kit for $100 on eBay. I could’ve also rented them from AutoZone for free but I chose to buy them. There are many affordable ways to get tools. Renting, borrowing from friends, Craigslist etc. You can get a small air compressor from harbor freight for $60. Since that repair I’ve used my pump and gauges twice more on two other vehicles’ AC repairs. And to your point about it taking too much time, I was fully expecting it to take a week or more, but I was pleasantly surprised and I was able to get it all done on a Sunday afternoon. It took about 6 hours give or take. To anyone who wants to take on this project I say do your research (save videos, take notes, reference a manual), order all your parts and gather your materials and tools, and carve out a day where you can fully commit to the repair, and just go for it! It is achievable for regular people. For $550 and 6 hours, I was able to get my AC fixed for half the cost a shop would charge. Plus, I learned a new skill that I’ve been able to use a few more times.