head milling & two gaskets???

[ianfotheringham]

So i pulled my 2F after getting some krap compression numbers - and it seems i got stuck with a block with 75 size pistons...the cylinders are fairly clean, and i certainly dont want to go to 100...need to find a fresh block...but in the mean time it was discovered that a source of the compression leak was some abrasion on the head between the cylinder walls, so my guy wants to mill it slightly to flatten it out - but then he was saying he'll be putting in TWO head gaskets to make up for the milling....anyone ever heard of this being even a decent idea???

seems to me two gaskets would lead to even more compression leakage no?

whats the maximum amount of milling to head without running out of room?

your thoughts are always appreciated...

 

[71FJ40]

Two head gaskets??? - think I would be looking for another machine shop. Usually planing is taking off on the order of a thousandth(s) - a head gasket is at least 1mm thick and will never seal against another head gasket

Others on the board have milled the head 0.030 without issues. I would just mill enough to make it flat.

 

[canadian bum]

Sometimes at least in the heavy duty diesel engine end of engines you can get a thicker head gasket to make up for the difference when the head or block has been decked. But as far as two headgaskets that isn't going to work at all. Plus that is a lot of material he is shaving off to make room for another head gasket I'm sure you would be beyond spec if that took place.