Cylinder head bolt plug

Details Cylinder head bolt plug Cylinder head bolt plug

1995-09-29

1997-05-20

McMahon, Marguerite

Internal-combustion engines

Particular piston and enclosing cylinder construction

Cylinder head

F02F 124

Patent

active

056303890

ABSTRACT:
A cylinder head bolt plug replaces longer cylinder head bolts and provides increased air flow to the combustion chamber of an internal combustion engine, reduced exhaust back pressure, and reduced frequency of cracked cylinder heads. Longer cylinder head bolts are replaced by a cylinder head bolt plug and shorter inner-fitting cylinder head bolts to permit reshaping and recontouring of the interior walls of air inlets and exhaust gas outlets. The shorter inner-fitting cylinder head bolts also reduce flexing and cracking of cylinder heads caused by tightening of standard longer cylinder head bolts. Method and apparatus permit modification of existing cylinder heads according to the invention.

REFERENCES:
patent: 3653369 (1972-04-01), Fangman et al.
patent: 4291650 (1981-09-01), Formia et al.
patent: 4524732 (1985-06-01), Dworak et al.
patent: 4530323 (1985-07-01), Wakasa
patent: 5069176 (1991-12-01), Ruf et al.

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