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Worm Bearing Preload

The adjustment of a work gear bearing to prevent or reduce backlash.

Worm Gear

1. The gear at the end of the steering column in a worm-and-sector steering system. 2. A gear that is shaped like a shaft with gear teeth cut in a continuous spiral around its outer surface. A worm gear changes the axis of rotation when it turns another gear.

Worm Hole

A galvanic reaction that erodes metal for the outer walls of wet cylinder sleeves.

Worm Shaft

A steering gearbox component having spiral grooves that resemble a coiled worm, to transfer motion from the steering-wheel shaft to the pitman shaft.

Worm Tracks

Oil flow circuits cast within a valve body.

WOT

An acronym for wide-open throttle.

WOTV

An acronym for Wide Open Throttle Valve .

Woven Wire Cloth

A woven metal material, such as phosphor bronze, stainless steel, or monel available in a wide range of mesh sizes; widely used for filtration.

WRAP

Western Regional Air Partnership (see http.

Wraparound Headers

Exhaust headers that fit closely to the engine block.

Wraparound Seat

A body-conforming bucket seat.

Wrench

1. To twist. 2. A hand tool for twisting and /or holding bolt heads and nuts.

Wrinkled Paint

A type of paint finish that has a wrinkled texture.

Wrinkled Walls

The wrinkling of the sidewalls on drag-racing slicks due to low air pressure.

Wrist Pin

A pin used to attach the connecting rod to the piston.

Wrist-Pin Bushing

A bushing that supports the wrist pin in a connecting rod.

Writing Speed

The ability of an analog oscilloscope to provide a visable trace of the movement of a signal from one point to another.

WS

Wastegate solenoid.

WST

Wastegate.

WU-TWC

Warm-Up Three way Catalytic converter.