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I went to my machine shop today, bad parts in hand to discuss what happened. Looking at the bearings and the crankshaft my guy surmised the rod bearings did go dry. It was hard for me to believe since I had done so much work to get oil to the rods. He agreed but, pointed out all that work I did was the problem. The cross drilling of all the mains, grooving the main bearings, not running the restrictors in the heads and notching the rods to squirt the bottom of the pistons was all good....for over 4000 rpm running. It is all terrible for idle. He said this has been dying a slow death for some time. My oil pressure at idle was low but I thought that is what the sixes do. He said nothing lower than 20psi.
So a little medicine is good, a lot not so much.
To add more damage to my wallet he said I had to replace, not flush, all of my oil lines. He has seen the metal bits imbed themselves into the rubber liner only to come loose later. Oil cooler replace. Oil tank complete disassembly. Clean, clean, clean.
I feel he is correct The new crank I will cross drill the center bearing only, run the head restrictors and use a case with piston squirters not notched rods.
Hopefully, that is the last of this story.
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