A combustion seal for sealing high pressure combustion gas within at least one cylinder of an internal combustion engine including a cylinder block, a cylinder head having a groove formed in its bottom face, a cylinder liner having a complementary groove formed in its top face, and a O-ring formed from...http://www.google.com/patents/US6036194?utm_source=gb-gplus-sharePatent US6036194 - Combustion gas seal for an internal combustion engine
