7upedition

Are there any mechanical parts of the AC system that need to be changed, converted, or replaced when converting from R12 to 134A? I am not doing this myself as I know the dangers of a pressurized AC system, however I'd like to know if it will cost more than the $45 kit at Autozone.

I've been telling myself I'm gonna do this for a year now! I think I finally might... lol

luizGT91

you need to change your a/cc oil for one of 134 and the reservoir

ROTTITANK

Does the autozone kit come with fittings?U needto change all a/c servicefittings.

7upedition

I was thinking they vacuumed out the old freon and refilled with new, i don't see why the resevoir needs to be changed?

I beleive the conversion kit does come with all the fittings. Not positive though...

Blckstng93

Im in the same boat here. Im looking to change mine out eventually as well. Mines been empty for a few years and dont want to buy all new condensor and stuff if i dont have to. New seals are obviously needed.

I keep being told that the two arent compatible and ALL the old stuff needs to be clean clean clean if you change.

Yes, no?

dukeme

I just tried exactly what you are doing and ended up bringing it to my buddy's and had it done correctly! That have to vacuum out all of the old R12 and oil and check the pressure for any potential leaks. Secondly that refilled the system with oil and R134 and rechecked for any leaks with a special die and light. DO IT RIGHT! It's worth the money.
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luizGT91

i changed my reservior 'cause it was fckd up but the guy who make my a/c work told me that the only thing i needed was to change the compressor oil and the reservior so there were no r12 residues and it blows cold air even at 105´F

7upedition

Okay i understand, from what i'm reading and hearing the r134a is much more volatile than the r12, so the oil and filter need to be changed. also the r12 has to vacuumed out throughly before the new pag oil/filter and freon can go back into the system.

How much did it all cost you... i want to do it right and only once, thanks

86 5.0L

I had to make the choice of staying R12 or going R134, to switch I was told to change the Drier, Evaporator, and everything else inside the dash, replace all the o-rings, then pressure test the system to 100PSI for any leaks, vacuumed the system, recheck for any leaks, now if you switched to R134 an adaptor is need for the low-pressure valve, add the oil, then add one can, turn on your A/C on the highest setting, make sure the compressor engages, again check for leaks, turning off your car helps to hear any pinhole leaks in the line or at the connections, add the rest of the cans if everything else checks out fine

tmajikman

I am going back to Freeze 12. Just like r12 but it is the same price as r134.