[urq] More a/c help please

[Buchholz, Steven]

... I'm not an A/C expert ... but I do know it is possible to clog the
expansion valve ... that's what caused mine to be inop years ago ...
this was in a completely sealed up system ... 

I don't think an "Italian Tune Up" will fix you here.  The expansion
valve is a bit of a pain to access as it is up under the dash ... but
overall it isn't that big a deal ... 

Steve B
San Jose, CA (USA)
> 
> so the saga continues.  patient is '84 urquattro with 3B motor
including the
> big 200 20V radiator fan. Stock urq a/c system otherwise - except it's
R134
> now - was converted 2 yrs prior to motor swap and it worked fine until
the
> swap when I removed the big line.   Fan comes on Stage 2 when a/c "on"
and
> high pressure switch "closes".  The system has sat idle for about 2
1/2 yrs
> since I did the motor swap.  I had removed the "big line" from the
compressor
> through the middle of the engine bay and over to the firewall.  While
removed,
> I securely plugged the hole in the compressor with a rubber grommet.
I also
> covered the open pipe end at the firewall with tin foil (multi layers)
and
> secured it with a hose clamp - so the system should not have been
exposed to
> much debris, if any.  My a/c guy is telling me the system pressure, I
think he
> said is all over the place - whatever he said, he said it's likely due
to a
> sticking/clogged/whatever Expansion Valve at the Evaporator.
> 
> Anybody have experience with this?  If I drive it a bit and build some
> pressure what are the chances it will free up?