There are about 1million threads on the "R12 to 134A" conversion. None of them really say anything by themselvs so I decided while it was still fresh in my head to give it a shot!

First and formost I STARTED WITH AN EMPTY SYSTEM (good enough treehuggers?)

I bought a retrofit kit at NAPA that had the conversion oil in 2 pressurised cans.

I removed the cap from the "S" side of the compressor and replaced it with a 134A coupler (looks the same but no outside threads.)

I left the "d" side alone because there is no reason to mess with the high pressure side right now.

I purchased 2 13oz cans of "over 50,000 R134A" (better for older systems and will mix with R12 residue"

first the 2 cans of oil go into the system, this puts enough pressure in the system to engage the clutch on the compressor and start the circulating.

next the 2 cans of 134A go into the system. (not much to talk about there)

I let the system run for about 30 minutes on MAX A/C with the doors closed and windows ****.

Thats about all. The system ate up all of the 134A and didnt seem to care. The unit blows cold air without any problems. There isnt a major rise in the temp guage.

I call the whole thing a sucess........


Jason

 

Great job.... I will be doing this too.

"There is no sin greater then Central Air"

 

The AC on my 80 has been converted and blows real cold, but my temps rise to half sweep regardless of how you drive it. You said you dont get a temp change, does yours stay a 3/8 sweep, if so I need to service my cooling system.

 

Min e was pre-converted before me, I dont know how it affects the cars coolant gauge. I never drive with it on

 

25 min of traffic and the needle never touched the picture on the guage. 3/8 or 1/3 im not sure.

 

Thats cool, I just bought a new thermostat and hoses, it might have a 195 thermostat in it or something, havent had the car long, good to know its not normal and there is room for improvement.