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Russ/40 · 07-16-2010, 11:17 PM

A general rule of thumb is .002" for each inch of bore size. As to the depth of the piston grooves, as long as you can completely close your ring compressor on the piston with rings installed, you know the grooves are deep enough.

07-16-2010, 11:17 PM	#2
Russ/40 Senior Member Join Date: May 2010 Location: Santee, California Posts: 3,505	Re: Piston Ring Clearance A general rule of thumb is .002" for each inch of bore size. As to the depth of the piston grooves, as long as you can completely close your ring compressor on the piston with rings installed, you know the grooves are deep enough.