Will a 3800 compressor from a '96 work with R-12 or do I need to use R-134a? I have a bunch of R-12 refrigerant and service/recovery equipment for it and would prefer to use over the newer stuff. I do know I would have to have custom lines built to interface the compressor with the firewall lines.

I am using my 3800 compressor with R12 in the system. The R12 actually has less head pressure so it works the compressor not as hard as when it had R134 in it. You have to make sure that you flush the compressor out really good to get out all the PAG oil that it has in it. I used AC flush and ran it through the compressor by hand about 3 times. I then put 2 oz of mineral oil into the compressor before i put the compressor back on the motor.

quote Originally posted by daniel87fierogt: I am using my 3800 compressor with R12 in the system. The R12 actually has less head pressure so it works the compressor not as hard as when it had R134 in it. You have to make sure that you flush the compressor out really good to get out all the PAG oil that it has in it. I used AC flush and ran it through the compressor by hand about 3 times. I then put 2 oz of mineral oil into the compressor before i put the compressor back on the motor.

Thanks for the reply. I will probably go this route. What did you use for the AC lines? Did you have custom made? I think the high pressure switch is already part of the compressor.