86 coupe a/c

[David Ullrich]

DuraCool could be used as a substitute but it's not really needed. It's
billed as a R12 drop-in replacement, but these days R134a can be used in
pretty much the same manner. The difference is you can "top off" a R12
system with duracool but cannot with R134a. I've done several "conversions"
just by emptying the R12 and filling with 134 and never had a problem. Also,
if doing a R134a conversion on a type 85, I'd suggest adjusting they AC temp
sensor down a bit. Its factory set to something around 48*f so  it cuts out
the compressor when the condensor gets to that temp. I set the one on my cgt
to cut out at 33* and never had a freeze-up and had nice ice cold AC...but
even with 33*f vent temps...the AC system on the type 85 is wholly
inadequate when temps get up there.

Dave
-Audiless for now
- Wanted: 1987 CGT Triple White


On 6/24/08, Max Hoepli <mhoepli at vif.com> wrote:
>
> When would "Duracool" be used?
>
> Max
>
> -----Original Message-----
> From: quattro-bounces at audifans.com [mailto:quattro-bounces at audifans.com]
> On
> Behalf Of Tony Hoffman
> Sent: June 21, 2008 12:43
> To: Mark Donohoe
> Cc: Quattro at audifans.com
> Subject: Re: 86 coupe a/c
>
> R134A has advanced over the years. It used to be you had to drain the
> old oil, evac the system, and then put a vacuum on it. Now, just make
> sure there is no R12 in it, and then put your new fittings on it.
> Then, fill away. If you do need a new compressor, the rotary "mini
> york" is a great substitute, and they don't take near as much HP as
> the older piston style compressors.
>
> It never hurts to change the 0-rings, BTW. Especially if the car has
> been without working AC for a while. For that matter, the reciever
> driers are only about $20, and it's a good time to change that out as
> well. But, neither is absolutely necessary. Everything else is
> compatible.
>
> Oh, one other thing, you only use 80% as much R134A as what the system
> calls for in R12. It expands more.
>
> Tony Hoffman
>
>
> On Sat, Jun 21, 2008 at 9:36 AM, Mark Donohoe <markdonohoe at sbcglobal.net>
> wrote:
> > I've owned my coupe for about 5 years.  The a/c has never worked.  Might
> have a leak in the compressor.  There is a nice coating of red grease on
> it.
> Someone may have run some dye through it before I got the car.  Anyway, I
> saw this 134a retrokit and want to know what you guys think. Directions say
> all you need to do to switch from R12 to 134 is vacuum the system and
> change
> out the ports for the 134 hoses and fill 'er up.  Can that really be so
> easy?  Seems like I've heard things about incompatible o-rings and hoses
> and
> what about the expansion valve and drier?  Any thoughts?
> >
> > Thanks,
> > Mark Donohoe
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-- 
David G. Ullrich
Cavu Consulting
"Finally, Affordable Technology Help"