perfacar said

hi, after 1000 miles , should be no wear period. unless a pin rubbed on bore.
wall clearance is determined by piston skirt dia. I measure bore, then piston dia to determine clearance. .003 is not excessive. what kind and brand is the pistons? just food forthought.

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360Z28 said

.003 is fine (but as stated, what pistons?). by measure i mean he should have mic'd the bores, and measure the taper in them (widths at the top,middle,and bottom of the cylinder bore). can't just measure the piston/wall clearance. a good hone job would fix that. he has no way of knowing wether a .060" overbore is OK without sonic testing. IMO he's just running through the motions and giving you the bill.

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