Cylinder head bolt plug
OwnerKevin G. Selfinventor
Life of this patent
Estimating the term…
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.
Claims30
A method for increasing air flow through the air inlet of the cylinder head of an internal combustion engine, wherein the cylinder head includes longer bores and shorter bores through which longer cylinder head bolts and shorter head bolts, respectively, pass to secure the cylinder head to the block of the internal combustion engine, said method comprising:
- countersinking a longer bore to create a larger bore to a depth such that the cylinder head can be secured to the block by a shorter inner-fitting cylinder head bolt of substantially the same length as the shorter cylinder head bolts;
- replacing the longer cylinder head bolt with said short inner-fitting cylinder head bolts;
- inserting a cylindrical plug into said larger bore, said cylindrical plug substantially filling said larger bore;
- securing said cylindrical plug to the cylinder head so said cylindrical plug does not move within said larger bore;
- recontouring and reshaping the interior air inlet wall near said larger bore by removing metal simultaneously from the interior air inlet wall and from said cylindrical plug inserted into said larger bore;
- sealing said cylindrical plug to prevent open communication between adjacent chambers within the cylinder head;
- and
- sealing said cylindrical plug to prevent oil from leaking into the air chamber within the cylinder head.
A method for increasing flow of exhaust gases through the exhaust gas outlet of the cylinder head of an internal combustion engine, wherein the cylinder head includes longer bore and shorter bores through which longer cylinder head bolts and shorter head bolts, respectively, pass to secure the cylinder head to the block of the internal combustion engine, comprising:
- countersinking a longer bore adjacent an interior wall of the exhaust outlet to create a larger bore to a depth such that the cylinder head can be secured to the block by a shorter inner-fitting cylinder head bolt of substantially the same length as the shorter cylinder head bolts;
- replacing the longer cylinder head bolt with said short inner-fitting cylinder head bolt;
- inserting a cylindrical plug into said larger bore, said cylindrical plug substantially filling said larger bore;
- securing said cylindrical plug to the cylinder head so said cylindrical plug does not move within said larger bore;
- recontouring and reshaping the interior exhaust outlet wall adjacent said larger bore by removing metal simultaneously from the interior exhaust outlet wall and from said cylindrical plug inserted into said larger bore;
- sealing said cylindrical plug to prevent open communication between adjacent chambers within the cylinder head;
- and
- sealing said cylindrical plug to prevent oil from leaking into the exhaust gas chamber within the cylinder head.
A cylinder head bolt plug for an internal combustion engine, wherein the cylinder head is characterized as having longer bores and shorter bores through which longer and shorter bores longer cylinder head bolts and shorter cylinder head bolts, respectively, pass to secure the cylinder head to the block of the internal combustion engine, wherein a longer bore has been partially drilled out to create a larger-diameter bore which is reduced to the original diameter of the longer bore at one end, said cylinder head bolt plug comprising:
- a cylindrical plug having a diameter slightly less than the diameter of the larger-diameter bore, said cylindrical plug characterized as having a length 0.25 to 0.50 inch greater than the length of the larger-diameter portion of the longer bore, said cylindrical plug further characterized as having an upper end and a lower end;
- and
- locking means for locking said cylinder head bolt plug in a fixed position in the cylinder head.
A cylinder head bolt plug kit for an internal combustion engine, wherein the cylinder head of the internal combustion engine is characterized as having longer bores and shorter bores through which longer and shorter bores longer cylinder head bolts and shorter cylinder head bolts, respectively, pass to secure the cylinder head to the block of the internal combustion engine, wherein a longer bore has been partially drilled out to create a larger-diameter bore which is reduced to the original diameter of the longer bore at one end, said cylinder head bolt plug kit comprising:
- a cylindrical plug having a diameter slightly less than the diameter of the larger-diameter bore, said cylindrical plug characterized as having a length 0.25 to 0.50 inch greater than the length of the larger-diameter portion of the longer bore, said cylindrical plug further characterized as having an upper end and a lower end;
- locking means for locking said cylinder head bolt plug in a fixed position in the cylinder head;
- and
- a short inner-fitting cylinder head bolt to be used in place of the standard longer cylinder head bolt.
Dependencies are inferred from the claim text.