Re: AC conversion again!

["content22207" <brobertson@xxxx>]

( Yet another moderator's note: Marc is right in at least one respect, this subject has been in and out of the list for a long time. There have been strong opinons on both sides of this issue. I think there's enough in the archives to eliminate any need for further argument. If you're considering this swap read the archives and if still in doubt consult your air conditioning shop. Bruce Benson, current moderator ) 


Oh for goodness sake, if you read my practice, I DO flush an R12
system at initial conversion (using A/C compressor itself, which is
particularly convenient for those of us without air compressors).

True, I leave low side loose to keep from flushing oil out (don't want
to lock compressor up while clutch is jumped), but let me think: White
Lincoln is entering 4th summer burning R134 on factory original
compressor with whatever oil Ford filled it with in 1978. Works OK for
me. If it bothers anyone, simply pour oil out of compressor and refill
with whatever tickles your fancy.

BTW: if you examine a pre-packaged R134 conversion kit you'll see they
leave oil in compressor too.

If this is going to be ANOTHER summer of people tied in knots over
R134, I'll just keep quiet. Are plenty of A/C shops more than willing
to play with R12 for a price. I'm doing fleet maintenance, so isn't an
option for me.

Bill Robertson
#5939 (1 of 5 vehicles burning R134)

>--- In dmcnews@xxxxxxxxxxxxxxx, Marc Levy <malevy_nj@xxxx> wrote:
> For what must be the 20'th or so time on this list.. 
> YOU CANT MIX R12 and R134! Especially the OIL'S!
> 
> If you are switching between freon/oil types and do
> not completely FLUSH the old oil out of the system
> (there is a specific machine and chemical for this
> process.. it is not the same as a regular evacuation),
> you will eventually clog the system and destroy the
> compressor. Yea, it will get cold for a year or so...
> but in the long run your looking at expensive
> repairs.
> 
> There is a new oil out that is compatible with both
> R12 and R134, but your 1981-83 system has the old
> fashion R12 style. If you convert it improperly, your
> looking for trouble.
> 
> 
> --- content22207 <brobertson@xxxx> wrote:
> <SNIP>
> > Hopefully will drop as passenger compartment cools
> > down. Since we're
> > entering A/C season, my R134 methods are written up
> > on DMCNEWS website
> > for like minded. Generate a lot of controversy among
> > R12 purists, but
> > the way I figure: if your system isn't putting out
> > now, what do you
> > have to lose? Only change is freon itself (all
> > factory components
> > re-used). If you don't like R134 performance, bleed
> > it back out and go
> > back to R12. Difference is about $120 (to R134's
> > benefit)...
> > 
> > Bill Robertson
> > #5939
> > 
> 
> 
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