Quote:
Craig wrote:
Packard8 Quote:I cleaned up the Hash pump (sludgy and the relief piston was stuck).
Good catch! I believe this is the "fatal flaw" in the Packard V-8 oil pump design which causes lifter clatter and later engine failure if it continues.
I'll start a new thread on this when I have all my info and pix together.
Craig
Yes, that sort of surprised me as the bottom end of the motor looks fairly clean. The relief piston was frozen closed and I had to tap it out with a drift..not sure if that would starve the lifters??? Wire wheeled the piston and cleaned the bore with a brass rifle brush. Lubed and reassembled it and it works smoothly now. Also there is a passage between the 2 chambers in the base of the pump (intended to lube the gears?) and it was completely blocked with sludge.
This motor was set up with the road draft tube connected via a rubber hose to the oil filler tube....a "closed loop" system guaranteed to sludge up an engine! I'm changing that so the road draft hose is directed to the flame arrestor (air cleaner) and the vapor will be burned off.
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