Quote:
Originally posted by Scott Clarke
I do find it odd, however, that this procedure is not common practice. Intuitively, it seems like poor upper cylinder surfaces would lead to head gasket failures.
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What you are saying is correct - poor surfaces may lead to cylinder leaks.
However, let's think about the setup here. We have a very hard steel cylinder and a relatively soft aluminum head. Which one is going to be deformed the most? Typically the head takes all of the abuse, and the cylinder doesn't really get damaged. The exceptions are pulled or broken head studs where the head is flapping against the top of the cylinder. This often breaks up the gasket and pounds it into the top of the cylinder.
-Wayne