Use a private window

"apparently first ac guy told me that there is no pistons and valves available to reconstruct a 10p13 compressor available so best thing would be to get a new compressor." Avoid a rebuilt compressor like the plague. Why not ask Tim the forum owner what he might have available for your appl...

does that sound right?

Cusser is right
"I seem to remember by design - for safety issues - that some outside air always had to be let into the cabin area..."
This is because of smokers. The car would totally fill with smoke otherwise.
However, does sound like the foam is shot

YAY! I too have had a brand new core blocked right out of the box. Now I blow dry compressed air thru everything before installing. We have a commercial dryer (actually a small compressor/evap/condenser- Speedair brand) in series with our shop air because we need super dry air to paint cars in our b...

please post your pressures at 1500 rpm

On a MACS forum always post pressures

a cup of water isn't much at all.
What we have in mind is a garden hose with continuous flow

"Most vehicles should turn on the radiator electric fan immediately with the A/C turned on"

BINGO

If you have failing diodes you can easily run the voltage way over 14.
Have it tested

That is some nasty crap on the OT. Long thread, don't recall if comp ever failed, if so condenser may not have been changed out, which is a must. As far as cooling, there will be others here that understand the wiring behind the condenser fan coming on. BUT FOR ME PERSONALLY I would never run the co...