Patent ID: 8056522

Claim:
A box-shaped valve cover structure for an internal combustion engine having adjustable valves, comprising: (a) a substantially rectangular, box-shaped structure having a substantially rectangular cross-section along its long axis, and a substantially square cross-section along its short axis, (b) an opening on one side of the structure in place of one long rectangular surface of the rectangular box-shaped structure, (c) one or more adjustment holes in the long rectangular surface of the structure opposite to the opening in (b) wherein the one or more adjustment holes comprise less than 20% of the area of that long rectangular surface, (d) a lip around the perimeter of the opening in (b) sized and shaped for mounting on the outside engine valve area of an internal combustion engine, and (e) one or more plugs sized and shaped to removably fill the one or more adjustment holes in (c), whereby an adjustment wrench can be placed through an adjustment hole to adjust a valve of an internal combustion engine without removing the valve cover structure from the engine.