McLugnuts wrote:Are the caps the seals or does the valve itself seal or a combination of both?

Combination of both, but GM Tech and others here say the cap is the true seal.

I'm tempted to go ahead and replace the schrader valves and caps. I watched a video in which a mechanic used balloons to test for leakage from the valves. Since it seems the freon is low or completely out again it seems like a good time to replace them. I would use soap bubble solution on the caps ...

I think i need to bring it to an automotive a/c specialist. Neither mechanic used a sniffer. UV light and UV goggles get used in the dark or near-dark. An automotive AC specialist will use/have a combination of techniques to pinpoint leaks: UV dye, electronic detector ("sniffer"), soap bu...

Check your refrigerant charge by having it extracted and weighed and compared to factory labeled amount for your system. That is always the first diagnostic step. You cannot determine refrigerant amount by pressures. There may be trouble trying to find the listing for oz. refrigerant with an add-on...

If you can't stand the heat...turn on the AC !!!

Bigcountry21 wrote:If you can't answer my question don't comment.

If you can't include all the details in your post, don't ask for help here !!! Might have been helpful to know that a $50 wave the hands service had been performed. Maybe you should take over the service of this vehicle.

I have R-12 too, and one truck that still uses that.

If your system is low on refrigerant, then you have a leak, which must be fixed. Don't go adding those miracle sealers in a can, you'll ruin the system.

You don't sound that experienced, take it to a pro.

Tommydigi wrote: I never vacuumed it out

How can you knowingly do wrong like this and expect good results ???? Do you think all the techs and engineers worldwide who DO evacuate the systems before adding refrigerant are idiots ???

. It is strange that I only got 2.1 oz out of the new compressor. I've heard stories of new compressors having zero to too much oil, I'd always drain it all out (turning the compressor) and measure it. And then add the right amount. I would NEVER believe that a compressor had sufficient oil for an ...