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flatjack9 · 11-14-2017, 06:27 PM

The measurement perpendicular to the pin and about 1/2" above the bottom of the skirt is what is used to determine the bore size for proper clearance. Another very important measure is the width of the ring grooves to be sure they are not too worn.

11-14-2017, 06:27 PM	#3
flatjack9 Senior Member Join Date: May 2010 Location: Oshkosh, Wi Posts: 4,527	Re: Measuring pistons? The measurement perpendicular to the pin and about 1/2" above the bottom of the skirt is what is used to determine the bore size for proper clearance. Another very important measure is the width of the ring grooves to be sure they are not too worn.