Automotive Air Conditioning Information Forum

It's a 1988 model.

I'm helping a friend resurrect the ac on a 1987 Chevy S-10. It has R134A fittings on it. When I change components, what kind of oil should I put back in?

7 oz is all that would go in. It was 85 degrees out, so system pressure would be 90 or so wouldn't it? Should try to run at least a little.

Wire setup for checking continuity of the coil was pretty sketchy.

2005 Saturn Vue. System was empty when it arrived. It had signs of dye around the high and low connections. No bubbles at connections when I applied nitrogen to the system. Can't find dye anywhere. micron gauge starts to rise when the vacuum pump is turned off. Added dye and 1/4 oz of oil. Vacuumed ...

Thanks for helping me understand that!
Learn something every day!

The system moves a lot of air and at 47 vent temp, it does a good job of keeping us cool.

Connections for the gauges are on the compressor. I would call it a long run of hose from there to the evaporator. It’s a cab over and the evaporator is mounted to the roof on the inside of the cab.

I wasn’t able too find a leak.

It is an E1.

Didn’t find any debris at the expansion block. Vacuumed for 10 minutes and it went down to 560 microns. Valved off the pump and it continued down to 530. It stayed at 530 for 10 minutes with no rise. Turned the pump back on and ran it for an hour total and it went to 510. Charged it with 5.5 lbs of ...

I’ll work on it again Sunday. The evap case is already off so we can look for dye. It won’t be much work to check the inlet.