I have a 07 HHR 2 4, my ac compressor had been only engaging intermittently, starting a month ago. So I started her up one hot afternoon hit the AC button, & it engaged! Jumped out to check pressure low side, loud pop, & all 134A & PAG was expelled! Was only running 2min from cold. Is there a pressure release valve that resets or does it need replaced?

 

Did you see where it got out?

 

No, can't see any blown lines or connections just PAG oil all over "skid" plate by compressor.

 

After I put my new engine in, I took it to my mechanic to recharge the AC. Some time shortly after, I noticed a leak. Here's the thread. https://www.chevyhhr.net/forums/prob...pressor-63053/

 

This was no leak, something popped loudly & shot out a refrigerant cloud that filled my garage & driveway.

 

That shouldn’t be hard to find, maybe the compressor blew an o ring , maybe the condenser is road debris damaged.

 

Thanks, still searching for blowout.

 

Did you miss the part that it was a relief valve? That's often what relief valves do, blow.

 

Yes, I did, that was my original thinking, just didn't know if it was one time blowout valve or if it was like a pressure relief valve on a hot water heater. Thanks

 

You say it's been operating only occasionally, sometimes that's a symptom of an overcharge. Has the refrigerant been topped off recently?