I have a leak in the rear of the Air Conditioner Compressor of my
1982 GMC VanDura 3/4 ton 305 V8. I suspect either the O rings between the metal block that attaches the hoses to the rear of the compressor or the seal @ rear cap of the compressor.I tried the GMC dealer for the O type rings that are flat on one side, but they didn't list anything specially for that connection. Also none of the local after market parts stores have seen an O ring with a flat side to it.
Does anyone know where I can get a 1 1/16 X 13/16 X 1/8 #16 O ring with one side flat? Also, is there a trick to getting the rear cap of the compressor to seat tightly with the 4 nuts & studs without a gasket or seal? The problem came about after I converted to the new 134A refrigerant. Not sure if that has anything to do with it? Thanx