Accession Number : ADD014988

Title :   Engine Block Cylinder Head Bolt Home Repair.

Descriptive Note : Patent, Filed 19 Jul 90, patented 25 Jun 91,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Stafford, James C

Report Date : 25 Jun 1991

Pagination or Media Count : 12

Abstract : This patent discloses a method for repairing cylinder head bolt holes including removing the cylinder head from the damaged cylinder bore and removing an adjacent cylinder head from its adjacent cylinder bore. A drill base support is installed in the adjacent cylinder bore and drilling platform studs are installed at locations corresponding to the drill base studs are installed at locations corresponding to the drill base stud holes. A drill base and a jig are installed and a drill press is used to drill and remove broken bolts. The inside diameter of the damaged bolt hole is measured and studs are installed in the block with adhesive applied to the threads of the studs.

Descriptors :   BOLTS, BORES, CYLINDRICAL BODIES, DRILLING, DRILLS, ENGINE CYLINDERS, HOLES(OPENINGS), PLATFORMS, PRESSING(FORMING), STUD WELDING, STUDS(STRUCTURAL COMPONENTS)

Subject Categories : Reciprocating and Rotating Engines

Distribution Statement : APPROVED FOR PUBLIC RELEASE