Overhead valve action and air pollutant device

Claim 1

In an internal combustion engine of the overhead valve variety having a cylinder head and having a series of valves with valve stems extending through the cylinder head, the valve stems being upwardly biased by valve springs, rocker arms, and pushrods for the rocker arms, a mounting stud for each rocker arm, a valve guide mechanism for each valve stem, the valve guide mechanism comprising: a support about each valve stem, each support having a base secured to the cylinder head and having a top; a mounting tab projecting laterally from each of the supports and engaged with the respective mounting studs of the rocker arms; a bearing mounted in the top of each support; the bearings being vertically aligned with the respective valve stems; a pushrod mounted in each bearing for vertical movement, each pushrod having an upper end and a lower end; and the pushrod upper ends being engaged against the rocker arms, and the pushrod lower ends being engaged against the valve stems.