Abstract
The bore distortion is increased during the head gasket installation. The bore distortion tends to become high for light weight engines and the problem has become important in recent years. In the present study the cause of the bore distortion is discussed. It is related to the sealing pressure generated by the head gasket. Also discussed is the bore distortion in the region between the cylinder bores, which has a typical bore pattern, in light weight engines. It is controlled by using a reinforcement plate in the gasket structure, that is, by adjusting the sealing pressure.
