Quote:
Originally Posted by Cam
So it would seem my crank is not bent. Turns out the journal is out of round. The machine shop said that they cannot fix it unless they do a .010" under-grind on that journal or all of them. I could then run 1 undersize bearing (number 6) or all of them under-grind. But that would risk having the machine shop mess up the oil clearances.
I am hoping I will just be able to run my crank as-is. The tight side of the tolerance is .0013-.0015" and the loose end is .0025". Anyone ever run an out of round crank? I have alread talked to a few people (machine shop included) that think I will be ok. I am not planning on taking the engine above 7500 rpm.
Some input from the engine builders here please?
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How many miles did the crank run before, 100K,
and it didn't fail due to that journal?
Cranks generally don't go 'out of round', it was likely machined that way in Japan