A/C Evaporator leak sealer
Thread Starter
Racer
Joined: Jun 2007
Posts: 468
Likes: 15
From: Jupiter FL
A/C Evaporator leak sealer
I spotted some info about a product used to seal a leak in the A/C evaporator. It was mentioned in a thread on this forum, but there was little info given about the product, other that it was a two step process in a can that costs $140.00.
I was told I have a leak in my evaporator. I assume the shop used some kind of sniffer to find the leak. They added two pounds of refrigerant and found the leak. That was 3 days ago. The system still blows cold so I assume it is a slow leak and one that could be corrected using the sealer mentioned in that other thread.
Anyone have any info on the process?
I was told I have a leak in my evaporator. I assume the shop used some kind of sniffer to find the leak. They added two pounds of refrigerant and found the leak. That was 3 days ago. The system still blows cold so I assume it is a slow leak and one that could be corrected using the sealer mentioned in that other thread.
Anyone have any info on the process?
Team Owner
Joined: Mar 2001
Posts: 21,325
Likes: 3,841
From: small town in S.E Pa. PA
St. Jude Donor '03-'04
If you have a slow leak...you can get a can of refrigerant at an auto parts store, it has the right amount of oil and a leak sealer...when your system bleeds out again.. get this can 10 to 12 dollars, and a thermometer, it should get down to about 40 degrees, ( stick the thermometer in your center dash vent, ) if you load on the low pressure side, its almost impossible to over charge the system.... a small leak will be contained, for alot less than the cost of replacement or that 140 dollar leak sealer... this is not rocket science.. the low pressure inlet is on the passengers side between the battery compartment and the engine block.. about 4 to 6 inches from the fire wall. keep the can upright and shake it ever ten seconds, the can will feel cold as it is charging with the engine running and the ac on high.... do about half the can and take notice to the thermometer, when it gets down to 40 degrees you should be good.. of course there are better ways to do do this with guages etc.. but this is much better than taking it to the dealer...
Thread Starter
Racer
Joined: Jun 2007
Posts: 468
Likes: 15
From: Jupiter FL
If you have a slow leak...you can get a can of refrigerant at an auto parts store, it has the right amount of oil and a leak sealer...when your system bleeds out again.. get this can 10 to 12 dollars, and a thermometer, it should get down to about 40 degrees, ( stick the thermometer in your center dash vent, ) if you load on the low pressure side, its almost impossible to over charge the system.... a small leak will be contained, for alot less than the cost of replacement or that 140 dollar leak sealer... this is not rocket science.. the low pressure inlet is on the passengers side between the battery compartment and the engine block.. about 4 to 6 inches from the fire wall. keep the can upright and shake it ever ten seconds, the can will feel cold as it is charging with the engine running and the ac on high.... do about half the can and take notice to the thermometer, when it gets down to 40 degrees you should be good.. of course there are better ways to do do this with guages etc.. but this is much better than taking it to the dealer...
Thanks for the tip sounds like a really cheap fix. But tell me when should I add the can of refrigerant? My ac is blowing cold now. Should I wait till it looses enough pressure so the compressor will not engage or should I try it now?
Team Owner
Joined: Mar 2001
Posts: 21,325
Likes: 3,841
From: small town in S.E Pa. PA
St. Jude Donor '03-'04
buy an automotive ac thermometer, clip it to your center vents... keeping note of the temp.. it should run around 40 F.. as the coolant leaks out.. could be a few days or a few weeks... when it gets to be around 50 F and wont get lower you can add half a can.. the idea here is to slowly add the sealant.. so it doesnt clog the system but only seals a very small leak. IM thinking the O rings in the evaporator may be causing this loss.the sealer and oil will liven them up.. it may take a couple of tries at half a can a time... Dont buy the can with the gage.. its a waste of money.. but if you can, buy a can with a reusable hose.. this way your second can should be around 10 dollars.. the can with the reusable hose is about 14/15 dollars..
Safety Car
Joined: Aug 2000
Posts: 4,933
Likes: 30
From: San Rafael CA
http://www.napaonline.com/NOLPPSE/(S...2999999+109999
Thread Starter
Racer
Joined: Jun 2007
Posts: 468
Likes: 15
From: Jupiter FL
Ok, I bought a thermometer and can of refrigerant/sealer.
Checked out the temperature and I got 39-40 degrees. Not bad from a system that is supposed to have a leak. It' been 4 days since it was recharged. I will keep checking till it hits 50 degrees then add the can of refrigerant/sealer.
thanks to all who answered.
Checked out the temperature and I got 39-40 degrees. Not bad from a system that is supposed to have a leak. It' been 4 days since it was recharged. I will keep checking till it hits 50 degrees then add the can of refrigerant/sealer.
thanks to all who answered.
Team Owner
Joined: Mar 2001
Posts: 21,325
Likes: 3,841
From: small town in S.E Pa. PA
St. Jude Donor '03-'04
Ok, I bought a thermometer and can of refrigerant/sealer.
Checked out the temperature and I got 39-40 degrees. Not bad from a system that is supposed to have a leak. It' been 4 days since it was recharged. I will keep checking till it hits 50 degrees then add the can of refrigerant/sealer.
thanks to all who answered.
Checked out the temperature and I got 39-40 degrees. Not bad from a system that is supposed to have a leak. It' been 4 days since it was recharged. I will keep checking till it hits 50 degrees then add the can of refrigerant/sealer.
thanks to all who answered.
Just contact me if you need further help...
good luck
Bill aka ET
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Every 2027 Corvette Engine Explained
Joe Kucinski
Designer Imagines A Corvette That Looks More Like a Corvette Than the Corvette
Verdad Gallardo
10 Ugly Corvettes That We Still Kinda Love
Joe Kucinski
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer
Brett Foote
10 Things Every Corvette Owner Needs (2026 Edition)
Michael S. Palmer
8 Most "Only Corvette Owners Understand" Quirks and Problems
Pouria Savadkouei
10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years
Joe Kucinski
How Much Horsepower Every Corvette Engine "LOST" in 1972
Joe Kucinski
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!
Michael S. Palmer
Team Owner
Joined: May 2001
Posts: 25,060
Likes: 1,265
From: Virginia
St. Jude Donor '11
I have been reading ET's helpful posts for years and my only complaint is that he doesn't post much anymore so I have to keep going back to his old posts and just wait for new ones...bummer
Note: I think its because lots of "losers" have given him so much crapola that he has cut down on posting
Team Owner
Joined: Mar 2001
Posts: 21,325
Likes: 3,841
From: small town in S.E Pa. PA
St. Jude Donor '03-'04
As you know
All the know it alls and legends in their own mind keep me from doing what Ive done here for years. I am too old to argue with anyone.. but on occassion I do post in open forum but I do not respond to any chest pounders, or those who get their information from some guy who knows someone who once dated an intern at GM... or worse yet those who get their information from their grandfather who owns a Buick, but has never figured out how to open the hood.. But that's the way he did it back in the 50's
Tech Contributor
Joined: May 2008
Posts: 3,100
Likes: 17
From: Somers, CT and Clermont, FL
St. Jude Donor '09-'10-'11-'12-'13-'14-'15-'16
ac, auto, automobile, bad, c5, car, complaints, coolant, corvette, evaperators, evaporator, installation, leak, sealant, sealer, small
