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piston to cylinder wall gap

jan arnett (2)

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4 minutes ago, Oldtech said:

Dykes says .001 for each inch diameter so .003  ( 3 thousandths).  Cast iron pistons can be fairly tight as they don't expand a lot, so .003 would be plenty IMHO. 


I agree........3-4 for cast iron pistons. Modern pistons with modern ring packages and materials may call for something different.

Edited by edinmass (see edit history)
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