Patent ID: 6327854
Filing Date: 2001-12-11
Classification: F01N

Abstract:
An arrangement for fastening an exhaust manifold (1) on to a cylinder head (8) of an internal combustion engine, the manifold having an inlet flange (3) with at least one hole (4), a threaded fastener (5) extending through the hole and attached to the cylinder head (8) by means of which the flanges (3) are secured to the cylinder head (8), and a flat gasket (7) interpositioned between the manifold and cylinder head and including a device to effectively space the manifold from the cylinder head to allow sliding movement therebetween caused by thermal growth comprising: a spacer element (9;12) seated between the fastener and the cylinder head and sized relative to the hole so as to provide a lateral clearance supported on the cylinder head (8) and having a length dimension less than the thickness of the manifold flange to an extent sufficient to desirably compress the gasket for providing sufficient sealing but also to limit the clamp load imparted by the threaded fastener on the connection between the exhaust manifold, gasket, and cylinder head to allow lateral sliding movement of the manifold relative to the cylinder head caused by thermal growth of the manifold.