zero decking the block

[Rev]

On my engine with forged TRW flat top pistons, I think the pistons (cold engine) are in a slightly different position each time I check with the bridge and with the dial iondicator. I get a .000 to .005 " down in the hole after I crank it a few turns. That's for the same #1 piston at TDC on the balancer. Also get some slight variation depending on what part of the piston top I measure from. I don't think that variation actually makes any performance difference, but it it is difficult for me to say exactly what the deck height measurement (how far down in the hole) my pistons actually are at TDC.

Rev