I had a 1998 Astro van with front and rear evaporators that you could hang meat in it. I have a set of the factory manuals on this vehicle if you're interested. They are in super clean condition. They have all wiring, unit repair, etc Email d k t v at aol. com

The black band on the diode should face the ground.

You may have hot air passing around the evaporator due to the vehicle being a 1967 (51 years old) and the rubber gaskets inside the evaporator box being bad. Bypass the heater and see if the vent temps drop. To test the POA on vehicle, kill the blower motor. At 1200 to 1500 rpm, the low side should ...

I think those vehicles had control valves for the V5 compressor.

AC system not activated. Compressor not engaged

Just measured mine from my kit. Use the .070 size. Good luck on installing a VIR in a 1973 Vette. Make sure the top of the VIR is in the correct orientation. You may want to use a SMALL amount of Never Seize on the threads.

What year? Some GM’s used capture type o rings.Also, which connection?

Did you use a POA elimination kit? A6 compressors were not meant to cycle on and off. GM tried that on some models and changed to the R4. R4 did not have an oil sump worth a damn so they were not a good choice. We will need high side pressures as well as low side pressures at 1500 RPM Reman'ed A6 fr...

Those systems have a sight glass on the VIR so charge until the glass is clear. With your gauges connected, engine at 1200 to 1500 rpm, disconnect the blower resister, does the low side drop to approximately 30 PSI? If not, start looking at the POA inside the VIR ass'y. If Tim does not have parts fo...

Do not forget to use the black light and glasses on the evaporator drain tube.