MikeRL411 Posted August 2, 2021 Report Share Posted August 2, 2021 On 8/1/2021 at 10:34 AM, Kujo720kittyD21 said: Question ❓ 85 86 Nissan z24 engine,. Pulled the head off one ,. Had the numbers 83w stamped one one side an the number stamped on the other. What would this indicate The "number" is a measure of actual piston diameter for use in matching up pistons and engine block bores during initial assembly at the factory. Quote Link to comment
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