Metal gasket having fluid hole sealing device with different spring constant

A metal gasket with a fluid hole sealing device for an internal combustion engine, said engine having at least one cylinder bore, a plurality of bolt holes and at least one fluid hole and being formed of a cylinder block and a cylinder head, said cylinder head having a rigidity such that when tightened to the cylinder block, sufficient surface pressure is not applied to portions away from the bolt holes due to distortion of the cylinder head along a rigid portion of the gasket, said gasket comprising:

• a first metal plate extending substantially throughout an entire area of the engine and including at least one first hole corresponding to the cylinder bore, a cylinder bore sealing device situated around the first hole, a plurality of second holes corresponding to the bolt holes and at least one third hole corresponding to the fluid hole, and
• a bead formed on the first metal plate around the third hole for sealing around the same, said bead having at least one first portion where high tightening pressure is applied when the gasket is tightened, said first portion being located adjacent to at least one of the bolt hole and the cylinder bore, and at least one second portion where moderate tightening pressure is applied when the gasket is tightened, said second portion having spring constant less than that of the first portion so that an area around the third hole is sealed effectively and sufficient tightening pressure is applied to the second portion due to insufficient rigidity when the gasket is tightened by the bolts.