[Chevelle-List] A/C Re-Installation

[Keith Cooper]

The car is a 71 Chevelle with the stock A/C system. I thought that the 71's used a expansion valve setup and did not have the accumilator. I was wanting to do the work myself to save money. I found a vacuum down unit that uses the air compressor. It sells for under $16.00. All I would need is to replace all the o-rings,the vacuum down unit, oil and freon. I just do not know if the expansion valve has to be replaced with something else if I change to R134. I had a friend that changed his 1991 IROC from R12 to R134 and it worked good. If I change to R134, I can refill it myself if needed. I want to learn how to change the system. I just need knowledge about how. I also need to know how much oil you have to add to a R134 system. I think that a 71 compressor uses about 3# of freon. Keith Cooper See my Chevelle: http://home.mindspring.com/~keithc/index.html