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Discussion Starter · #1 ·
Hi everyone, need advice on main bearing clearances. I am building an engine for a friend. He supplied me with a standard crank that he bought off here. The seller said it's been micro polished but not reground.
Tonight I measured the clearances with plastigauge. I used the old bearing which I believe are standard size ( how can I tell)"?)
Anyway the plastigauge hardy spread atall! The biggest measurement on the gauge is 7 thou and the plastigauge is probably 1/2 the width of that.

How do I know what size bearing to go for?
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