----- "David Scheidt" <email@example.com> wrote:
> From: "David Scheidt" <firstname.lastname@example.org>
> To: "Ron Schmittou" <email@example.com>
> Cc: "Shop Talk" <firstname.lastname@example.org>
> Sent: Thursday, May 27, 2010 1:28:40 PM GMT -06:00 US/Canada Central
> Subject: Re: [Shop-talk] trucks a/c
> On Thu, May 27, 2010 at 2:02 PM, Ron Schmittou <email@example.com>
> > What was the year of the changeover - I can't remember.
> Calendar year 1995. (some cars really did switch in the middle of
> model year.) But lots of '93 and '94 cars are R134a, depending on
> make and model. GM was using R134a in MY94, but maybe not
> universally. A proper change in production requires some
> re-engineering of the AC system, to adjust to the slightly lower
> cooling capacity of R134a, so it probably wasn't done all at once.
Two data points:
My 1994 Mazda Miata had 134 AC from the factory.
I believe that Saturn saw the change coming and built the AC big enough to take
it. My 1992 Saturn SL2 was built as R12, but a fairly-inexpensive 134
conversion at the Saturn dealer gave me ice-cold AC.
Phil Ethier West Side Saint Paul Minnesota USA
1973 Triumph Stag LE22439UB "uncle jack"
1979 Caterham Super Seven
2004 Suburban 8.1
2007 Saturn Ion 3 2.4
pethier [at] comcast [dot] net
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