1. Field of the Invention
There has been proposed and commercialized a head gasket interposed between a cylinder block and cylinder head in an automobile engine in which beads are formed so as to surround combustion chamber openings, oil holes, bolt holes, or the like, and a coating layer is formed all over a gasket component sheet constituting the head gasket and/or along the beads, thereby obtaining an improvement in seal performance (see Patent Document 1, for example).    Patent Document 1 Japanese Unexamined Patent Publication No. 2000-28002
2. Description of the Background Art
The head gasket described in Patent Document 1 is acted upon by shear forces in an in-plane direction due to a difference in expansion between the cylinder block and the cylinder head, and by repeated loads in a direction of extension and shrinkage of a clearance between the cylinder block and the cylinder head during engine operation. This causes problems in that, across the ages, the coating layer peels off and decreases seal performance and the cooling water filter becomes clogged and impairs cooling performance.
An object of the present invention is to provide a seal layer-transferred metal gasket that can effectively prevent degradation in seal performance due to the wearing and peeling of the coating layer.