Posted by gbs on February 17, 2015 at 07:22:21 from (70.210.19.227):
In Reply to: OIL PUMP posted by gbs on February 16, 2015 at 18:25:31:
I got concerned about the gauge and installed two different manual ones, they both show very little pressure at operating temp. when at low idle, any speed above that is reasonable,I check the relief valve and added a .060 shim no difference, then installed a new pump basically the same results,pulled a couple rods and mains the bearings shells had very little sign of wear, crank journals are slick as glass I realize that doesn't mean it's not out of round or undersize,but in an old engine it's a pretty good indicator of it's condition,I checked the oil clearance with plastigage laying in the worn part of the bearing shells, mains were .002 ?? not thinking until someone mentioned it due to weight of the crank that is off somewhat,rods cleaned and dry check .003,I'm going to recheck the crank with a mic,another possible dumb thought, would it be remotely possible to check the cam bearing clearance by removing the rocker arms and using a dial indicator to check movement while lifting the cam? I don't mean to ramble on about this problem but as I have grown older I am more inclined to find the cause of a problem before spending a couple days tearing something down and putting it back together when it would have took very little time to fix it to begin with, let alone the extra expense of parts,if I had only known what was causing the problem to begin with, BTDT to many times, thanks for all the inputs never know when a seemingly insignificant thought is the answer to a complex problem, thanks again for all the help
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