Gold Lifetime Member
Join Date: Oct 1999
Location: Alamogordo, NM, USA
Unable to Charge AC System
I am trying to charge a 68 with a factory stock R12 system. During the mechanical restoration I did, the entire AC system was disassembled. Has a new, rebuilt compressor and a new receiver. All lines and components were flushed. System holds vacuum.
When I try to charge it, I can only get 7 ounces to go in. The cylinder is not cold, it's in a bath of hot water. The pressure in both low and high side is 85 PSI at 80 degrees ambient with engine not running. Pressures do not change with engine running and compressor clutch engaged. I confirmed that both schraders are being opened by the hose fittings. I even tried to charge directly from the cylinder to the low and then the high side, nothing, no flow.
It acts like there is only 10% of the system's volume available to charge. I can't believe there would be a blockage, in fact, there would have to be two to isolate the rest of the system. How can that be possible? I don't see how I could have assembled the system incorrectly. Everything pretty much falls into place.
I am totally flabbergasted and puzzled on this! Please help!
69 Z/28 Resto-Mod
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