Wankel Rotary - WOT Switch

Wankel
A rotary engine with few moving parts.

Warped Cylinder Head
A head with a distorted (twisted or curved) surface as a result of overheating.

Waste Gate
A valve that limits the amount of boost developed by the turbocharger by venting excess exhaust gases.

Water Corrosion
Injector damage caused by the presence of water in diesel fuel.

Water Detector
Warning device that tells the driver there is water in diesel fuel.

Water Pump
A pump (usually of the centrifugal type) that circulates coolant through the engine and radiator of a vehicle.

Water Pump Rebuild
Process of disassembly, cleaning, parts replacement, and reassembling a water pump.

Wear Bar
Solid bars of rubber across the tread that appear when a tire has worn to the safe limit.

Wear Sleeve
Bushing between the axle and seal on a front-wheel drive vehicle.

Wedge Chamber
Combustion chamber with a triangular shape.

Wet Charged
Battery that is filled with electrolyte and fully charged at the factory.

Wet Compression Test
A test made by placing small amount of oil in a cylinder with a low reading, to determine whether worn rings are cause of low compression.

Wet Sleeve
A thick cylinder liner exposed to coolant.

Wheel Alignment
Adjusting wheels of a vehicle to roll in a straight line.

Wheel Balancing Machine
Device used to identify locations where weights must be placed to balance a tire.

Wheel Bearing
Ball or roller bearing assemblies that reduce friction as wheels or axles rotate.

Wheel Brake Assemblies
Components that use hydraulic pressure to apply friction for stopping vehicle.

Wheel Cover
Metal or plastic disk designed to fit over center section of wheel for better appearance.

Wheel Cylinder
Hydraulic piston that actuates braking at each wheel.

Wheel Cylinder Rebuild
Process that typically involves honing the cylinder and replacing all rubber parts (cups and boots).

Wheel Hop
A bouncing or up-and-down movement.

Wheel Puller
A device used to remove pressed-on parts, such as gears.

Wheel Shimmy
A side-to-side movement caused by dynamic imbalance.

Wheel Speed Sensors
Magnetic pickups to detect wheel speed (used on anti~lock braking systems).

Wheel Weight
Small pieces of lead that are clipped to the wheel rim to balance the wheel and tire combination.

Wiggle Test
Physically moving wires and connectors to locate broken wires or other causes of intermittent problems.

Winding
Loop of wire on a motor armature that generates a magnetic field.

Wire Wheel
Cleaning tool with wires arranged radially, rotated at moderately high speed to remove carbon deposits from parts.

Wiring Diagram
Drawings that show relationships of components in an electrical circuit.

Wiring Harness
A group of primary wires enclosed in a protective plastic covering.

Work
The result of force causing movement; measured in foot-pounds, watts, or joules.

Worm Shaft
Input gear in a re-circulating ball gearbox.

Worn Cam Bearings
After prolonged engine use, this condition can cause reduced oil pressure.

Worn Idler Arm
Condition that can cause steering wheel play.

Worn Piston Rings
Many engine problems arc caused by failure of worn rings to properly seal against cylinder walls.

Worn Rocker Arms
Primarily cause noise (valve clatter).

Worn Tie Rod End
A cause of excessive play in the steering wheel.

Worn Timing Chain
Permits slack between camshaft and crankshaft sprockets, so valves no longer keep proper timing with the pistons.

Worn Joint
Excessive play between the cross and yoke.

Worn Valve Guide
Enlarged guide that allows valve to move excessively, causing various engine problems.

WOT Switch
Device that shuts off air conditioning compressor.