[V8] A/C confusion

[cobram at juno.com]

You're not supposed to force the refrigerant in.  You have to vacuum the
system (compressor driven Venturi type vacuums are under $25), and with
the AC manifold (dials) hook up your refrigerant to the low side, system
vacuum will suck in refrigerant, and you'll usually have to jump the
pressure switch for the compressor in order for it to kick in and suck in
the rest.

The original Audi (GM) accumulator/dryer didn't have any fittings, you're
supposed to remove the pressure switch (up against the right fender under
the cowl cover, and there you'll find the charging port.  Don't know if
they've changed anything on the 1994 or not.

The accumulator/dryer is a basic GM design, a sealed tube with a bag of
desiccant inside, if it fits the application,  it'll work just fine.  

I think there was small thread on this about a week ago...could have been
on the main list.

BCNU,
http://www.geocities.com/cobramsri/
Some days you're the dog, some days you're the hydrant

 
"Intemann, Paul (GE Infra, Aviation, US)" <paul.intemann at ge.com> writes:
> OK ... I am officially stumped.  Ordered an A/C accumulator for both 
> the
> '90 & '94 V8q's from RockAuto.  Both arrived ... but the '94 
> doesn't
> have a "service port" (the '90 accumulator OTOH has 2!!!)???  What
> gives?  It plumbed in OK but how the heck to I fill it with only 
> the
> high pressure port available (keeping in mind that my 30 lb 
> fill-tank of
> R-134 does not generate "enough" pressure to drive sufficient Freon 
> into
> the system through that port).  And using the '90 accumulator isn't 
> an
> option either because Audi (in their infinite wisdom) decided to 
> upsize
> the "upstream" coupling thread diameter in the '94 compared to the 
> '90
> and '91's (not sure about the '92 & '93's).  At this point the only
> thing I can think of doing is getting myself 3 of those "small" 
> R-134
> cans and using their (hopefully) higher packaging pressure to get 
> the
> required amount of Freon into the system.
> 
> Any other ideas?
> 
> Thanks in advance,
> 
> Paul