[njsteve]

Went to my mechanic buddy again this morning and we used his A/C vacuum pump to leak check the system. Rather tedious process as you have to pull it down to 28" of vacuum for 30 minutes and then let it sit for 30 minutes and watch the gauges to see if there are any leaks.

It leaked, so I tightened every hose. Redid the process and it leaked again, only faster. Replaced the rear O-rings in the compressor flange. Redid the test and it leaked. Then retightened everything again. Redid the process and it leaked.

We both then got really frustrated and attached the R134 conversion flanges to the access ports so we could put in some R134 with leak detection dye. Before adding any R134 we redid the test and there were no leaks! It held for an hour with no movement on the gauge.

So, that meant that his 40 year old O-ring in the hose flange nut for his R12 gauge set was leaking and not my A/C system. We both had to laugh after spending around 8 hours repeating the process over and over again. [img]<<GRAEMLIN_URL>>/no.gif[/img]

I didn't want to add my precious R12 at this time, because this winter I will be pulling the engine. I just wanted to know that the system was set up properly with no leaks.