ok, i bought a junk yard york AC pump and installed it exactly how Jeff Holsted did his in the technical section. ok heres the problame: the output is low, like WAY low. and its blowing oil out of the output hole. i figure that since my truk is diesel and idles at a very low RPM that could account for some low output. but im really conerned about the oil. my only thoughts are that the piston ring is totally worn out, but i dont think so because it had enough commpression to blow my finger off when i turned the pully with my hand. i think i might have to tear it apart and rebuild it but im hopeing someone will have an easy fix for it. if not does anyone know where i could get a rebuild kit?