Quote:
Originally Posted by Bob Bidonde
I have seen engines run well with as much as 0.13" of crankshaft end play. As crankshaft end play increases, so does oil leakage from the rear main bearing.
I would not do anything in your case. Run it and have fun.
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Unexplained Mysteries:
When I was in High School we had a 31 town sedan with a worn out engine, but it ran fine for playing around town, which is all we did with it. It had more end play than any Model A engine I've ever seen, but did not leak any oil.
When you stepped on the clutch, the pulley and crank went forward about about an eighth of an inch or so, and made a rather loud bang/clunk, but it ran fine, did not pump oil, did not make other running noises, and apparently there was enough room in the rod to piston and front and center main clearances.
I don't recall we ever had the pan off, but I always assumed the babbitt thrust was completely missing on the rear cap and block. Front and center mains must have had enough clearance to the crank as well.