A/C conversation
Thread Starter
Pro
Joined: Apr 2002
Posts: 621
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From: dripping springs tx
A/C conversation
I am thinknig of changing the freon over on the a/c to 134a. Has anyone made the switch and if so how did you drain the oil out of the compressor and did you have to replace all of your o-rings to a new type?
Le Mans Master
Joined: Nov 2000
Posts: 7,246
Likes: 21
From: Going too fast over the hill. Iowa
Re: A/C conversation (Veet 66)
The service rep at my Chevy dealer did that to his pickup truck. Just removed the R12 and installed the R134a. He has had no problems, other than the A-C does not blow as cold as it did with R12. After hearing that, I decided to keep the R12 in my roadster. I haven't put the hardtop on the car since the day I brought it home, and the vinyl top makes it hard to keep cold on a 100F day.
Drifting
Joined: Aug 2000
Posts: 1,805
Likes: 36
From: Annapolis MD
Re: A/C conversation (Veet 66)
There are other environmentally friendly alternatives for R-12 that are a bette match for you compressor cycle than R-134. I'd take a look at them (RF-12 and H-12 I believe) first.
-Greg
-Greg
Melting Slicks
Joined: Aug 2000
Posts: 3,077
Likes: 2
From: The Garden Spot of the Garden State
Re: A/C conversation (GregP)
...there's a right way and a wrong way, and just blowing off the r12 and pushing in r134a is what?...the WRONG way...
among the potential for incompatibilities between the two differing refrigerants, which is probably minor, the lubricants are completely different so bubba may trash his compressor bearing soon...the correct way to do it is to evacuate the r12, break all the connections, install new compatible o-rings, pull a vacuum on the sytem and add r134a per instructions for that system...r134a will not work as efficiently with a system originally designed for r12 because the operating pressures required to compensate for the r134a's relative inefficiency may not be possible on an antique system unless you know the whole thing is fresh
[Modified by Kid_Again, 1:39 PM 2/4/2003]
among the potential for incompatibilities between the two differing refrigerants, which is probably minor, the lubricants are completely different so bubba may trash his compressor bearing soon...the correct way to do it is to evacuate the r12, break all the connections, install new compatible o-rings, pull a vacuum on the sytem and add r134a per instructions for that system...r134a will not work as efficiently with a system originally designed for r12 because the operating pressures required to compensate for the r134a's relative inefficiency may not be possible on an antique system unless you know the whole thing is fresh
[Modified by Kid_Again, 1:39 PM 2/4/2003]
