[200q20v] RE:200q20v] successful r134a conversion on 86+ a/c?

[Brian.Link at Level3.com]

If you switch to r134a you will have a less efficient airconditiong system.
A 20% less efficient system can still blow cold air. You will need to change
to a different type of oil.   So a good flush of the system will be
necessary.

Autofrost which I think is the same as R22 (HCFC) is better than r134
(performance wise) but it might eat through our rubber o-rings,  recommend
you switch to neoprene seals.  Better performance than r134a, about the same
or better as R-12.  Use the same oil as R-12.

HFC based - better performance than R-12, r134A.  better environmentally,
use same oil.... the down side is that they are flammable.  (Some new ones
claim not to be).  http://www.btt.org/

AFIK,  All will work in stock hoses.    

I still have stock R-12 in my car, but thinking about what would I do when I
need to service my AC system. 


Date: Wed, 27 Jun 2001 11:54:24 -0400 (EDT)
From: Chris Covington <malth at umich.edu>
To: <quattro at audifans.com>
cc: <200q20v at audifans.com>
Subject: [200q20v] successful r134a conversion on 86+ a/c?

Has anyone done this using the stock hoses?  I hear there is a possibility
that any of the new, smaller-molecule refrigerants can leak through old
hoses, the result being that the car will hold charge for about a month or
two then deplete.
Has anyone used R134a successfully on a Nippondenso system for a long
period of time?

Chris
'91 200q20v

ps - If so, then there won't be any issues with Autofrost leaking either