CYLINDER HEAD GASKET

摘要

The purpose of the invention is to make it possible to perform pressurized leak tests on open loop chain case-side oil seal beads. The purpose is achieved with a cylinder head gasket, which is fitted between the cylinder block and the cylinder head and seals the three-surface sealing region obtained by combining the cylinder block, the cylinder head and the chain case, and in which an open-loop chain case-side oil seal bead that is open toward the chain case is provided in the chain case-side end of the gasket. The cylinder head gasket is characterized in that a closed-loop leak test bead is provided in the cylinder head gasket along a chain case-side oil seal bead and a leak test pressure supply path for supplying leak test pressure to the space enclosed by the leak test bead is provided.

主权项

1. A cylinder head gasket installed between a cylinder block and a cylinder head and sealing a three-surface sealing portion which is constructed by a combination of said cylinder block, the cylinder head and a chain case, comprising:
an open-loop chain case side oil seal bead which is provided in a chain case side end portion in said gasket and is open toward said chain case side, wherein a closed-loop leak test bead is provided along said chain case side oil seal bead, and a leak test pressure supply path is provided so as to supply a leak test pressure toward a space area which is surrounded by said leak test bead.