Glossary “valve head” Definition:
Term designating the enlarged end of the valve.
valve guide
Glossary “valve guide” Definition:
Bore in the cylinder head through which the valve stem passes.
valve float
Glossary “valve float” Definition:
1). Valve that does not close completely. 2). Valve that does not close at the proper time, due to high engine RPM.
valve face
Glossary “valve face” Definition:
Tapered section of the valve head making contact with the valve seat.
valve duration
Glossary “valve duration” Definition:
Length of time that a valve is open, measured in degrees of crankshaft rotation.
valve curtain
Glossary “valve curtain” Definition:
Opening of the annular passage between the valve and its seat when the valve is fully open.
valve clearance
Glossary “valve clearance” Definition:
Term used for valve lash. Usually adjustable clearance in the valve train.
valve canting
Glossary “valve canting” Definition:
Non-parallel placement of valves in a cylinder head.
valve body assembly
Glossary “valve body assembly” Definition:
An assembly containing the parts that act as the “brain” of an A/T, receiving messages on gear selected, vehicle speed, throttle opening and engine load, then operating automatically by sending fluid to apply the appropriate bands and/or clutches.
valve assembly
Glossary “valve assembly” Definition:
1). Tire valve stem that fits through the wheel to allow the tire to be filled with air or adjusted. Cap seals the valve and prevents foreign debris from entering and damaging the pin. 2). A term used for valve body assembly.
valve arrangement
Glossary “valve arrangement” Definition:
The way valves are placed in an engine, such as valves-in-head or valves-in-block.
valve angle
Glossary “valve angle” Definition:
The angle at which the valve face is machined.
valve
Glossary “valve” Definition:
Circular-stemmed device used to control the flow or air/fuel mixture in and the flow of burned gasses out of the engine. Any device that controls the flow of liquids or vapors. May be started, stopped or regulated by a maovable parts opening, shutting or partially obstructing one or more parts or passageways.
value guides
Glossary “value guides” Definition:
Used car price guide.
valleys
Glossary “valleys” Definition:
Annular grooves or recessed areas between the lands of a valve spool.
validity list
Glossary “validity list” Definition:
List of valid bulletins supplied by the manufacturer.
valence shell
Glossary “valence shell” Definition:
Outermost shell or orbital path of an atom.
valence ring
Glossary “valence ring” Definition:
Outermost orbital path of electrons around the nucleus of the atom.
valence electron
Glossary “valence electron” Definition:
Electron in the outermost shell or orbit of an atom
valence bond
Glossary “valence bond” Definition:
Extent to which an atom combines or “bonds” with other atoms.