- V -
Valve Seat
The ring of hard metal to which the valve seals.
Valve Spool
A spool-shaped valve such as that in a power-steering unit.
Valve Spring
A small coil spring that closes the valve and keeps the lifter in contact with the camshaft.
Valve Stem
1. A device mounted in the rim or inner tube to provide a method of increasing or decreasing air pressure inside a tire. 2. The long, slim, round part of a valve.
Valve Tappet
A term used for valve lifter.
Valve Temperature
The operational temperature of a valve that may reach 1,400 degrees's F at the head and be as low as 100 degree's F at the stem.
Valve Timing
The actual opening and closing of the valves in relationship to the number of degrees of crankshaft rotation.
Valve-In-Head Engine
An overhead-valve engine with the valves in the head.
Valve-Lifter Foot
The end of a valve lifter that rides on the camshaft.
Valve-Seat Insert
A replacement valve seat.
Valve-Seat Recession
The tendency for some valves to contact the seat in such a manner as to wear away the seat.
Valve-Spring Retainer
A device on the valve stem that holds the spring in place.
Valve-Spring Retainer Lock
A device on the valve stem that locks the valve-spring retainer in place.
Valve-Spring Seat
The area in the cylinder where the fixed end of the valve spring is attached.
Valve-Stem Groove
That part of the valve stem used to position the keepers and locate the valve retainer.
Valve-Stud Boss
The boss in the cylinder head that supports and holds the rocker-arm stud.
Valves-In-Receiver
An assembly containing the expansion valve, suction throttling valve, desiccant, and receiver.
Valvetrain
The collection of parts that make the valves operate. The valve train includes the camshaft(s), related drive components, the various parts that convert camshaft's rotary motion into reciprocating motion, and the valves and their associated parts.
Van
A box-shaped, light truck with a forward cab.
Van Conversion
A van that has been customized as a camping vehicle or for some other specific use.