Patent ID: 6532929
Filing Date: 2003-03-18
Classification: F02F

Abstract:
An apparatus comprising:an internal combustion engine including a cylinder head defining a hole; and a fastener including a head and a shank, the head having a bearing surface defining at least one channel across a portion of the bearing surface; wherein said fastener is received within the hole and said bearing surface is in contact with said cylinder head when said fastener threadably couples said cylinder head to said engine, the hole and the shank defining a chamber therebetween, and said channel venting gas from within the chamber; wherein said cylinder head defines an intake passage for said engine, intake air for said engine flowing through said intake passage, the head of said fastener being exposed to the flowing intake air, said channel venting gas from within the chamber to the intake passage; and which further comprises a block for said engine and a gasket partially sealing portions of said cylinder head from portions of said block, whereby combustion gas flows into the chamber, though said channel, and out to said intake passage; wherein said fastener head includes four equally spaced channels in the bearing surface.