1992 Corvette convertible
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2nd Gear
Joined: Jan 2013
Posts: 2
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From: Happy Valley OR
1992 Corvette convertible
I've owned this corvette for about 5 years and it only has 40k miles on it. Need to change over the A/C unit to the proper freon. Any thoughts on easy this is to accomplish. Please note I am not a very mechanical guy but if it is not to difficult and I can save some bucks, I am willing.
Melting Slicks
Joined: Mar 2008
Posts: 2,351
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From: Delta B.C. Canada
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Burning Brakes
Joined: Nov 2004
Posts: 897
Likes: 12
From: Land of Whiskey Rebels, PA
From what I've learned about this R12-to-R134a conversion is this:
1. The oil that is used in an R12 system is not compatible with R134a.
2. No amount of flushing will get all of the R12 oil out of the system, resulting in the destruction of the R134a, eventually.
3. A couple of things need to be replaced. I think they are the pressure switch and the Schraeder valve. There could be more than that.
My suggestions are:
A. Maintain your current stock system and continue to use R12.
B. Install a whole new, clean system and fill it with R134a and the proper oil.
C. Fill with another refrigerant that is compatible with your existing R12 oil.
1. The oil that is used in an R12 system is not compatible with R134a.
2. No amount of flushing will get all of the R12 oil out of the system, resulting in the destruction of the R134a, eventually.
3. A couple of things need to be replaced. I think they are the pressure switch and the Schraeder valve. There could be more than that.
My suggestions are:
A. Maintain your current stock system and continue to use R12.
B. Install a whole new, clean system and fill it with R134a and the proper oil.
C. Fill with another refrigerant that is compatible with your existing R12 oil.
