Indeed the oil in an R 12 system is not compatible with the oil required in an
R134a system. R12 uses a mineral oil which needs to be purged from the entire
system if making a conversion to R134a. Furthermore, a cleaning solvent must
be used to clean the evaporator, condenser, and hoses if you plan on reusing
them. The drier needs to be replaced with one that has a compatible dissicant,
or it is possible to have your OEM drier refurbished with the proper dissicant
by one of several antique auto AC specialists in the nation. Other changes may
have to be made to the expansion valve as well (depending on your vintage).
--- On Sat 05/17, Dick Benjamin < dickb@xxxxxxxxx > wrote:
From: Dick Benjamin [mailto: dickb@xxxxxxxxx]
To: mailing-list@xxxxxxxxxxxxxxxx
Date: Sat, 17 May 2003 09:22:52 -0700
Subject: Re: IML: AC Systems
If the system is overcharged, there will be too much torque required to
turn<br>the compressor, and either the clutch or the belt will fail, if
the<br>compressor itself doesn't fail.<br><br>However, the blower failure has
to be a separate problem, unless someone<br>unplugged a wire when fiddling with
the system. It is time to take the car<br>to someone who knows what he is
doing, and has the right equipment.<br><br>Dick Benjamin<br>----- Original
Message -----<br>From: "Kerry Pinkerton" <pinkertonk@xxxxxxxxx><br>To:
<mailing-list@xxxxxxxxxxxxxxxx><br>Sent: Saturday, May 17, 2003 1:54
AM<br>Subject: Re: IML: AC Systems<br><br><br>> I'm no AC expert either but I'd
doubt that the type of gas caused the<br>clutch<br>> to fail or there to be an
electrical problem with the fan.<br>><br>> If they did not put the new oil in
the system, it would be the compressor<br>> that failed, probably not the
clutch.<br>><br>> KerryP<br>> Patch panels fabricated<br>>
Pinkertonk@xxxxxxxxx<br>> d
te.net/57imperial<br>> Imperials -- 50 Limo, 57 roadster, 61's, 62, 68
Convert, 73, a 66 300 and<br>a<br>> bunch of lesser marques<br>> ----- Original
Message -----<br>> From: Jim Gathmann <jim_gathmann@xxxxxxxxx><br>> To:
ImperialList ImperialList <mailing-list@xxxxxxxxxxxxxxxx><br>> Sent: Friday,
May 16, 2003 11:49 PM<br>> Subject: IML: AC Systems<br>><br>><br>> > I know
nothing of car AC systems- well... I know that<br>> > you have a gas which is
moved around by a compressor<br>> > through a radiator to transfere heat out of
some air<br>> > which is blown by an electric van into the car's AC<br>> >
ducts... but other then that, I'm clueless.<br>> ><br>> > Got an e-mail from an
other Mopar/Imperial owner- this<br>> > person just had their AC system
converted to R13a, and<br>> > within a couple hours, the compressor stoped
working<br>> > and a loud noise was heard.<br>> ><br>> > Ends up the
compressor's clutch (which was under a<br>> > year old) died.<br>> ><br>> >
That was
replaced (for something like $400 US), and<br>> > now the blower/electric fan
is not working at all.<br>> ><br>> > Could it be that lubricant of the
compressor was<br>> > skiped or done wrong during the conversion or<br>> >
something?? Any ideas on this one?<br>> ><br>> > I'm thinking something went
wrong with the conversion<br>> > job and killed the compressor- and then after
that was<br>> > replaced, the blower either died, a fuse blew, or a<br>> > wire
broke causing this new problem.<br>> ><br>> ><br>> > ___<br>> > Also on this
topic- is there a way to tell if there is<br>> > any refrigerant in an AC
system before removing AC<br>> > system parts? My system has not been used in a
decade<br>> > and I'm pretty sure there is no gas left inside it-<br>> > but
want to be safe when I remove the system this<br>> > summer/late spring. I know
my system doesn't get cool<br>> > at all, and the compressor at el appears to
work, so<br>> > that combined with the fact the system has nev
er been<br>> > used makes me suspect some leaked out- but don't want<br>> > to
release gases under pressure (especially when I<br>> > know not of what kind of
pressure these systems use!).<br>> ><br>> >
__________________________________<br>> > Do you Yahoo!?<br>> > The New Yahoo!
Search - Faster. Easier. Bingo.<br>> > http://search.yahoo.com<br>> ><br>>
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