Patent ID: 6055806
Filing Date: 2000-05-02
Classification: F01N

Abstract:
An exhaust manifold seal arrangement for an internal combustion engine having a block with a plurality of cylinders, a cylinder head cooperatively associated with the block, the cylinder head having an exhaust valve and an exhaust duct for each cylinder in fluid communication with an exhaust manifold, the exhaust manifold seal arrangement comprising a counter bore in the exhaust ducts extending inwardly from a juncture of the exhaust manifold and the cylinder head and terminating with a flat annular surface disposed perpendicular to the counter bore, a spiral wound gasket having chevron shaped end portions separated by an elongated portion, and an overall length greater than the distance between the flat annular surface at the end of the counter bore and the exhaust manifold and the elongated portion does not contact the counter bore, whereby when the exhaust manifold is fastened to the cylinder head, the spiral wound gasket forms a leak proof seal and a thermal liner between the exhaust gases and the counter bored portion of the exhaust duct.