The XM here still only holds gas for about 6weeks. It has a new evaporator (old one was leaky), new 'O'rings through into the dash (and everywhere I have touched). Works well...... while there's temporarily some gas in it I have receipts here for thousands and thousands and thousand of dollars spent on the A/C in this car, and from what I can tell, it's never not leaked.
I'll go over it again with a UV light tonight.... I'm starting to think it must be the compressor seal. Either that or it's leaking at the *back* of the condensor where I can't see (as it's up againt the radiator).
Is there anything special about Sanden SD7 compressors that I need to know... Hopefully I can just buy the seal and replace .... If nothing else it at least rules another possibility out.