RE: more A/C questions

[Bob.Sandy@USPTO.GOV]

If the local Auto-parts store doesn't have an R-12 recharging kit, then you
may want to track down a Snap-On dealer, or the like, and obtain either a
kit or ideally a recharging kit with gauges and hoses.  

Regarding a tracer-leak detector dye, I managed to find a product that is
intended to be affix onto the low-side (i.e., between compressor and
evaporator) service valve, wherein the dye is either manually forced into
the A/C system by turning a hexed end with a 5/8 inch wrench, which moves a
piston therein, or by forcing the dye into the system while charging with
R-12 (the hexed end also included a threaded service valve so as to act as
an intermediate coupling between the service valve and the charging hose
end).  This device is substantially tubular and about 7 inches long having a
1-1/2 inch diameter.  The problem I have with this device, is that it is too
long such that the device will not fit between the low-side service valve
(on the compressor of a 91 CQ) and a front frame support.  I have a general
idea where my leak is (an area where the low-side line, between the
evaporator and the accumulator, couples to the accumulator) using a freon
sniffer, although using a dye will indicate the actual leak.

I'll end up using a soapy-water solution and look for bubbles.  In the
meantime, I'll e-mail you with  product information about the tracer-dye.
BTW, this tracer dye is specifically for R-12 and R-22 systems.

Good luck,

Bob
91 CQ
93 Passat GLX
73 'Cuda 340
92 English Springer Spaniel

> -----Original Message-----
> From:	erik@aero.und.edu [SMTP:erik@aero.und.edu]
> Sent:	Wednesday, June 09, 1999 11:47 AM
> To:	quattro@audifans.com
> Subject:	more A/C questions
> 
> The A/C on my 89 200tq is not working this season.  Took a look around
> and discovered that both high pressure switches in front of the condesor
> have obviously leaked.  All other seals _appear_ OK.  I can replace the
> 2 seals, but what I am curious about is recharging.  The local place
> charges like $50 + $40/lb R-12 but I happen to have three 1 lb cans of
> R-12 sitting around.  Is it still possible to find the attachment to
> recharge the car my self?  Where?  Is it possible to install tracer dye
> with this method (just for future leaks)?  How?
> 
> Thanks,
> Erik