Crank Thrusting Foreward Issues

Ironmike said

I'm wondering if it possible this might "starve" #3 main .........
Just a thought.

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I would not worry over it with such a small hole as is being recommended. Remember, #2 and #4 mains oil feeds also have feed oil up through the cam to the heads, and that extra oil flow to each head does not starve those mains particularly.