Metallic Cylinder Head Gasket for Vehicle
is of double sealing structure with shim, grommet (hemming)
formed by the folded back edge of sub-plate as well as stopper
formed by thermal splay, weld etc. along the periphery of
combustion chamber bore to improve sealing of combustion gas
(prime sealing with annular stopper and secondary sealing
with bore bead).
Furthermore fatigue of metals can be alleviated with annular
stopper due to its diminishing effect on the motion of engine.
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