Not Ranked
Dan;
When I build an engine I like to have my block "decked",not all the way till the pistons are at the top,but at least one pass on the machine to insure the deck is perfectly flat for head sealing purposes...... Once my block is bored and honed I DO trial fit all the pistons and crank and check the piston to deck clearance on all eight cylinders,then decide how much or how little to deck..... My last engine was cut the bare minimum it took to get a clean flat deck surface,came in less than .010.....My compression was where I wanted it to be so I told the machinest to take off as little as possible..... The engine before this one,I had the deck cut .030,which is a lot,but with the pistons I was using I needed that much for my desired compression ratio...
So far,by doing this step, I have never had any head gasket sealing problems,I feel it's cheap insurance,some people do it and some do not,I just prefer the peace of mind and the shop I use for my machine work charges very little extra since he does all my other machine work on my blocks....
Just my opinion......
David
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DAVID GAGNARD
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