It's not the cylinder that protrudes it's the Pistons...
And please justify how the cylinder will hold the head up from sealing...
Google block decking and watch a video and you'll see that the entire surface is cut down and flat/square is the intent.
And yes if you remove material from the head, that must be accounted for, removing it from the block only increases your piston height which is what you gauge your head gasket on anyway.
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Sorry, I meant to say piston, not cylinder, My bad.
If you have material taken off either, or both sides, it must be compensated for.
That's what I was saying, that's all.
Now as for the gasket sealing, don't you think that there's a seal between the cylinders and the water and oil ports?
Is this seal not gained with a properly installed head gasket?
Yes the gasket seals between the block and head.
Either way, the issue is either poor machining, or improper gasket thickness, or improper torquing of the head against the gasket to seal the deal.
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