Patent ID: 6540233
Filing Date: 2003-04-01
Classification: F01N

Abstract:
An exhaust manifold gasket adapted for interposition between a cylinder head exhaust port defined by an interior wall and an exhaust manifold; said gasket comprising first and second metal layers fixedly secured together in a plane and having one medially positioned aperture therethrough, said first and second layers defining at least one full sealing bead about said aperture, said second layer including a plurality of circumferentially depending leg portions symmetrical with said aperture and orthogonal to said plane, wherein said gasket further comprises a cylindrical sleeve portion circumferentially attached to said leg portions, said sleeve extending orthogonally with respect to the said plane and parallel to said leg portions such that said leg portions are positioned between said sleeve and the wall of said exhaust port, said sleeve comprising a heat insulating medium adapted to extend into said cylinder head exhaust port, said sleeve being sized to define a circumferential air gap clearance between said cylindrical head exhaust port and said sleeve.