[V6-12v] R134A conversion

[Lt Kubosh]

 As I know, here in Europe is some R12 "earth friendly" replacement. No cleaning necessary. Just vacuum the R12 and fill with the replacement. 
Mr. Google told me this:

Anyone have any info/experience with the new R-12 replacement from Pennzoil? It's called FR-12 and is supposed to be a direct replacement for R12. -=Steve=-
and this 

www.redtek.com

>-----Puvodni zprava-----
>Od: apowell at colocougs.org [mailto:apowell at gocougs.wsu.edu]
>Odesl?no: 18. dubna 2005 0:57
>Komu: v6-12v at audifans.com
>P?edm?t: [V6-12v] R134A conversion
>
>
>"Frank Chapchuk" <chapchuk at hotmail.com>
>
>After 13 years, the AC on my '92 100 isn't as cold as it used to be. The
>system still runs on R12. Does anyone know what must be done to convert to
>R134.
>
>----------
>
>Yes. You can try to use the existing compressor, but chances are it will leak like crazy due to the
>smaller molecular size of R134A. As long as it still works with R12, your smartest move is to
>re-charge with R12.
>
>Otherwise, in order:
>
>1) Go to an AC shop and have the whole system vacuumed out thoroughly to clean it up.
>
>2) Remove the drier (accumulator) and replace it. It has R12 lubricant in it and that lube cannot be
>used with an R134A system.
>
>3) If you're brave, replace all O-rings with R134 A type. If you do this, you should probably also
>replace the orifice valve (small conical screen) in the system just so it's clean.
>
>4) Go back to AC shop and have them charge it up with R134A and the correct lube.
>
>Cooling will be about 1/3 less efficient than the original system, and you will probably get less
>than one season between complete re-charges due to leakage.
>
>The best fix is to replace the compressor as well, but it's an expensive part and a lot of work to
>get at. You will still have some leakage.
>
>R12 is the smart place to stay as long as the system works. It's much cheaper than the conversion.
>
>************************************
>Al Powell
>apowell at gocougs.wsu.edu
>1958 Fiat 1200 Transformabile Spyder
>1983 Datsun 280ZX Turbo
>1993 Audi 90Q
>1991 Camaro RS Convertible
>1997 Chebby Blazer
>1999 Chebby Blazer
>************************************
>
>
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