Stop leak for air conditioning in car
I just returned Interdynamics Artic Freeze Refirdgerant - says it was developed for Nasa and that it runs cooler than regular R134. Problem is that it has some stop leak - less than 1% of it's volume though. I Googled "Is A/C Stop Leak Bad?" and I got many respones. Some people say it works wonders while other say to stay away from Stop Leak.
Like this good review:
Leaks on ac systems, especially ones that take days to loose the charge like you describe are 9 times out of 10 o-ring drying out and shrinking related. And the current crop of stop leak(seal swellers) that contain leak detecting dye charges are safe and easy to use if used properly.
I have been doing auto ac work for close to 35 years now and say with confidence trying one of the widely available stop leak/leak detector charges is always the best place tostart. Especially if the system is older than 6 years. I have repaired many systems that lasted for years after with one of the available stop/repair leak charges.
In the last few years there are a couple of charges that I have had good luck with in auto ac's. The first sold last summer for ~$28-30 at wal-mart, a complete charge in a tall blue can with a hose and gauge. The other one sold last summer for ~$13-18 and is also in a blue can. If one of these doesn't fix it all you have lost is few $$ and a little time.
The only thing you might faul with a repair charge is the dryer/receiver, a part which will have to be changed anyway if break the system open. If one of these stop/repair leak charges does swell a leaking o-ring then car is fixed. For me worth at least one try to see if your leak is something as simple as a dryed out and srunken up leaking o-ring.
Not having to break the system open may have saved weeks of chasing down new problems that your repair caused. What I mean by that is, once a car reaches 6 years old and older just the starting of a repair can lead directly to a list of related failures, ( hoses that suddenly go bad from the movement of being loose, other parts that fail from being open to air and moisture ). Parts that would not have failed before you started the repair.
So I don't know what to do... There are good & bad reviews of this stuff. Some mechanics say use it ... it works... others say it will destroy your system.