[beastmaster]

" Travis Q " Another method is the one Marty used and he touched on it in the other thread, and that's the gas filled oring/sealing ring. The ring is compressed slightly in its groove as the head is torqued, and if the head lifts the ring expands to take up the gap. Also, as the hot combusion gases come into contact with the ring, the pressure in the ring increases, which tightens the seal further. This is a great method to use if you have room between the cylinders for the rings, which most engnes do, but some don't.

That method is the commonly used in the building of the hot section in a turbine engine . We call them the e-ring . Good ideal!