tolerance stacking

Well, the saga goes on.
Yesterday I was able to borrow the machinists height checker dial gauge and measured the piston stick-out above the block. Due to tolerance stacking, in order, the pistons were 010, 013, 014, 014, 0155, 014 sticking out of the deck. Those numbers were supposed to be 010. The reason I think they got off was the crank was ground 10/10 which meant they had to follow the casting which could have been off from OEM. So 2-3 thousandths there and maybe a piston was cast a little off and then maybe a bearing shell was off and maybe the rod wasn’t perfectly ground. When you add up the 4-5 different possible places to have a critical dimension, then you can end up with that much error. The 010 out of the block is what I want to end up with so that combined with the measured 049 headgasket that supposedly will compress to 046… I’m gonna be pushing the compression!

So today I pulled all but the #1 piston, marked bearings to make sure they went back exactly in the same spot, and pulled the rings BACK off the pistons and took them back to the machine shop to be re-cut to alleviate the 0055 too much stickout. Will see on Monday what it ends up with.