A/C retro fit.

Henry A Harper III hah at alumni.rice.edu
Wed May 26 17:29:54 EDT 2004

> Why downgrade to 134A?  There are several direct replacements for
> R-12.  Do a
> search for Autofrost.  Approx. $15 LB, and can be mixed with R-12.

My experience with Autofrost was, shall we say, unsatisfactory.

See http://www.audifans.com/pipermail/200q20v/2002-June/009463.html

Replaced the expansion valve on the GTI last year because it stopped
"expanding" - can I blame that on the R-406a too? - after that still working
well with R-134a. The new valve said it was "compatible with R-134a" but I
don't know if that meant it was somehow "recalibrated" or just

If you are going to replace the hoses with barrier type, and all o-rings so
the R-406a doesn't leak out you might as well be doing an R-134a conversion,
IMHO. R-134a is not leaking on my GTI with just a few o-rings replaced,
still using the original hoses. James likes the fancy R-134a conversion
expansion valve from acsource.com, but I think he's got another conversion
with original expansion valve and it works just fine too.

Henry Harper
http://www.henry-harper.com  hah at alumni.rice.edu
1991 200 quattro, 120k, still(!) on snow tires while I try to decide what if
anything to do about worn summer tires/brake upgrade
1988 GTI 16v, 240k, radio at shop and driving with no music encourages

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