[Shotimes] A/C R12 to R134a Conversion Questions

[Chris "Zap"]

http://www.acsource.com sells a good o-ring lubricant called Nylog.  I have
spoken with professional A/C techs that use this stuff, and highly recommend
it!

~Chris
----- Original Message ----- 
From: "Epperly" <epperly1@optonline.net>
To: "SHOtimes" <shotimes@autox.team.net>
Sent: Thursday, July 24, 2003 5:39 PM
Subject: Re: [Shotimes] A/C R12 to R134a Conversion Questions


> A little "O" ring grease is recommended rather than freon oil as freon oil
> will absorb water and will rust up quickly making it hard to impossible to
> remove in the future. The small amount on the "O" rings will never get in
> the system.
> Subject: Re: [Shotimes] A/C R12 to R134a Conversion Questions
>
>
> > Heikki:
> >  Use whatever oil you are putting in the system to lubricate the
o-rings.
> > Any other grease or oil is NOT recommended! The o-rings are different so
> be
> > sure and use the "Green" ones. They are available separately. Consider
> > changing the condenser too. Depending on the condition of it and where
you
> > live in the country. R134a is not as efficient refrigerant as R12. What
> this
> > means is that to achieve equal cooling you need a larger condenser and
> > evaporator, which is what the factory did when they swapped to R134a.
You
> > may never see this effect if the A/C is not loaded to maximum. I live in
> > South Louisiana and with the high temperatures and humidity the A/C
system
> > is pretty much at maximum output in the summer.
> >
> >  Yes I would order 94-95 A/C parts since these cars were factory filled
> with
> > R134a. Replace the liquid line and the filter/dryer/accumulator for
sure.
> > This should be done anyway with the age and miles our cars are now at.
If
> > not changing the compressor be very careful which oil is used. There are
> > compatibility issues if you are not aware. I would also do a good flush
on
> > the remaining  components that are not changed. Mainly the evaporator
and
> > condenser if you keep the old one. Check this place for good A/C info
and
> > parts prices:
> > http://www.ackits.com/
> >
> > Last: Consider how your system failed. Is it still working? The number
one
> > problem with retro fits is not cleaning the debris out from the prior
> > failure. You can easily ruin all your new parts trying cheap it out!
> > Compressor is your main culprit!!
> > .
> > .
> >
> >
> >
> > > I am currently collecting parts to repair/convert the A/C in my '93
MTX.
> > If
> > > someone has done this and is willing to help me out that would be
> greatly
> > > appreciated.  In searching for these parts I came across listings for
> the
> > > liquid line and the accumulator/drier.  In most systems I have seen
> there
> > is
> > > a component known as the filter/drier.  Is the filter in the SHO A/C
> > > incorporated in the accumulator/drier?  Or is there an independent
> filter
> > > somewhere that I also need to replace?  Since I am converting to R134a
I
> > > will also need to replace any other parts which are R12 specific.  I
> read
> > a
> > > mention of replacing the orifice, which is part of the liquid line.
Do
> > the
> > > liquid lines with the R134a orifice directly replace the liquid lines
> with
> > > the R12 orifice?  i.e. Can I simply purchase a liquid line for a '94+
or
> a
> > > R134a liquid line for a '93- (if such exists)?  As for the
> > > accumulator/drier, is this specific to the type of freon that is being
> > used?
> > > Are there other parts that are suggested replacements?  I plan to
> replace
> > > the o-rings to ensure a good seal.  Can I leave the manifold/discharge
> as
> > it
> > > is?  If anyone has any info that may be helpful please let me know.
> > Thanks.
> > >
> > > -Heikki
> > > 'hA-kE
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