Subject: Best R12 to R134a Conversion Kit for Audi

[Christopher Ritchie]

>Has anyone documented the conversion process for a '91 Coupe or
>the like?

>And, what is the best conversion kit out there?
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There is an Audi Technical Service Bulletin (TSB) on converting Audi R-12
systems to R-134a ones.

There is no kit.  You need new R-134a compatible:

1=2E receiver/drier
2=2E green "O"-rings
3=2E expansion valve
4=2E oil
5=2E high and low side fittings

You may need:
6=2E new hoses
7=2E rebuilt/resealed compressor

Do not use the Interdynamics kits.  Make sure you get as much of the old
R-12 oil out as possible.  Make sure you put a good healthy vacuum on the
system for a long time.  The reason for these last items in this paragraph
is that if you don't do these things, the system will rot from the inside
out.  If you don't do these things, acid forms in the system which tends to
attack the thin walls of the evaporator and condenser.  These 2 itms are
very expensive.

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