English

Noun

overhead valve ‎(plural overhead valves)

1. (automotive) A type of internal combustion engine design which has the inlet and exhaust valves in the cylinder head (and therefore above the piston). The camshaft can be beside the pistons (with pushrods and rockers operating the valves) or above the valves, with the latter usually referred to as overhead cam.

See also

• overhead cam
• side valve