Automotive Glossary
Automotive Glossary
Browse the glossary using this index
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Valve LifterCam follower or tappet. | |
Valve MarginThe thickness of the valve head between the valve face and the head surface. | |
Valve NeedleThe control pin in, for example, a fuel injector. The needle works against an accurately shaped component to control flow. | |
Valve OverlapThe term used to describe the angle of crankshaft rotation when the inlet and exhaust valves are both open. | |
Valve SeatThe bevelled surface annular face in the cylinder head that closes each port and into which a valve seats and seals the port. | |
Valve Seat InsertA steel insert fitted in aluminium and some iron cylinder heads to form a durable seating for the inlet and exhaust valves. | |
Valve SpringThe spring that closes and holds closed the valve. It fits around the valve stem above the guide and between the cylinder head and valve spring retainer. | |
Valve StemThe shaft of a valve. | |
VaneA flat component used as part of a pump that moves a liquid or fluid. | |