developtrust wrote:
 At $180 to service it I'd like
> to fix any leaks to minimize a yearly drop of almost $200.
>
> Any advice? It is 80 degrees in California today with our dry Santa Ana
> winds and also summer is coming.
>
> Has anyone solved this AC issue more permanently than replacing freone every
> year?
>
Last spring I converted my 91 to R134a.  The PO had said that the R12
had leaked out soon after he had it recharged.  I replaced the
reciever-drier , emptied the old oil out of the compressor, replaced it
with ester oil.  I put in new O-rings at those connections.  I suspect
that the ones at the compressor were leaking; they were quite flat and
hard.  I pumped the system down for a few hours with a vacuum pump and
then recharged it.  I invested about $75 in a service gauge set.
  I am quite happy with the performance so far, but it has been less
than a year.

Larry A.