Mark S

iTrader: (1)

I recently realized my HKS filter (Which had been resting on the AC line :-( wore a hole through the aluminum refigerant line.

Now I'm forced to do a 134 conversion. Has anyone done it sucessfully? Or know of a place to get R-12?

Are the rubber lines 134 compatible?

Anyone know how to get the existing R-12 compatible oil out so it can be replaced w/ 134 compatible oil?

Fingers

Yes, i have done the r134 conversion a couple months ago. i had a qualified shop do mine. They first did a vacuum to suck out all the old remnants and whatnot (ac lines were purged at rebuild).... he poured the r134 oil in there, changed the o-rings, and charged it with r134. Worked perfectly, and i haven't had a problem yet.

copandengr

The previous post is correct for the conversion process. The oil used for R-12 is not compatible with R-134. The system must be purged and the oil removed from the system, including the compressor. The system must then be charged with the proper amount of 134 oil. The compressor has a plug on the body where oil can be drained and refilled.

There are several brands of refrigerant on the market that function as a substitiue for R-12. These substitutes can be used without flushing the system. I have no experience with them so I can't say how they perform. Around here the substitute is sold as Freeze 12.

R-134 has a higher boiling point than R-12. For this reason the systems designed for R-12 will not cool as well in city traffic, but there should be no noticable difference on the highway. R-134 will work at higher pressures than R-12, so there is a little more strain on the components when using it.

88'gxln/a

my 88 has the 134 conversion on it and it is nice to go to walmart and recharge it for 5-25 dollars instead of paying someone 100 or more for r12.