[Gmecm] OT - alternative refrigerant test... HFC152A

[Aaron]

I have had good luck with just dropping in R134a in to late 70's GMC Evap /
Thermal expansion valve systems.
Typically all the o-rings get replaced, but only because they are SO OLD.

-----Original Message-----
From: gmecm-bounces at diy-efi.org [mailto:gmecm-bounces at diy-efi.org] On Behalf
Of Gary Evans
Sent: Monday, May 13, 2013 11:15 AM
To: gmecm at diy-efi.org
Subject: Re: [Gmecm] OT - alternative refrigerant test... HFC152A

Not easily done from a chemical standpoint I suppose. It's not for lack of
trying there is (or perhaps, was) billions of dollars to be made with an
easy replacement.

I have had very good luck with drop-is R-134a replacement on mid 80's
Japanese vehicles. Dryer and oil change only - kept all the old hoses. It
typically goes about 5 years between needing top-offs.

-Gary