A term used for lateral runout or tire waddle.
A station wagon.
To perform at peak efficiency.
The abnormal tracking or steering of a vehicle.
Wankel Engine
An engine concept developed in Germany in the 1950s having a three-sided rotor in a slightly hourglass-shaped oval chamber.
Warm Up
To allow an engine to reach its normal operating temperature.
Warm-Up Regulator
A device in a fuel-injection system to adjust the air/fuel mixture while the engine is warming up.
Warning Blinker
A term used for hazard system.
Warning Flasher
A device found in the turn signal and hazard flasher circuit that causes the warning lamps to flash on and off.
Warning Light
A light on the dash to warn of a problem.
A slight twist or curve in a surface.
The corrugated surface of an unpaved road.
A round, metal device with a hole in the middle to help secure a nut or a bolt.
Waste Oil Heating Manufacturers Association (WOHMA)
An association of waste oil heater manufacturers that promote recycling used motor oil as a heating fuel.
Waste Spark
A spark occurring during the exhaust stroke on a computerized ignition system.
A turbocharger relief valve to prevent the buildup of too much pressure.
Water Brake
A type of absorption unit found on some dynamometers.
Water Burnout
The application of bleach or water to the rear wheels prior to a burnout to clean, scuff, and heat the tire surfaces for better traction immediately before a drag race.
Water Column
A manometer.
Water Control Valve
A mechanically operated or vacuum-operated shutoff valve that stops the flow of hot water to the heater core.
Water Cooled
Using water as a heat transfer medium.
Water Diverter
A device used to direct the flow of coolant in a head or block.
Water Filter
A replaceable filter used to remove impurities from an engine-cooling system.
Water Glass
A common term for sodium silicate.
Water Jacket
The hollow passages inside the cylinder head and engine block through which coolant flows to carry away the heat.
The open spaces within the cylinder block and cylinder head where coolant flows.
Water Pump
A device, usually located on the front of the engine and driven by one of the accessory drive belts, that circulates the coolant by causing it to move from the lower radiator-outlet section into the engine by centrifugal action of a finned impeller on the pump shaft.
Water Soluble
Any material that will dissolve in water.
Water Valve
An electrical-, mechanical-, or vacuum-operated device that controls the flow of coolant to the heater core.
Water Wash
The forcing of exhaust air and fumes from a spray booth through water so that the vented air is free of thermal-sprayed particles or fumes.
Water-Cooled System
A term used to identify a liquid cooling system such as one that uses water and antifreeze.
Water-Heated Choke
A bimetallic spring in the choke assembly that opens the throttle valve during warm up when the engine coolant reaches a specific temperature.
A unit of measure of electrical power.
Watt's Linkage
A three-bar arrangement of a live or de Dion rear axle to prevent lateral movement.
A specific quantity of electrical power.
Wave Scavenging
Internal exhaust resonating that increases the extraction of exhaust gases.
A compound to shine the painted surface.
To beat a competitor in a race.
Wax Pellet-type Thermostat
A term used for pellet thermostat.
Wear Compensator
A device mounted on the clutch cover having an actuator arm that fits in a hole in the release-sleeve retainer.
Wear Limit
A manufacturer's specifications as to the durability of a part in terms of serviceability.
Wear Mated Parts
A condition that exists when two parts rub against each other.
Wear Pattern
Visible wear.
Wear Sensor
A projection on an inboard brake pad that causes a squealing sound when the brake pads are worn thin.
Weather Modulator
A term used for cold-weather modulator.
Weather-Pack Connector
A connector, having rubber seals on the terminal ends and on the covers of the connector half, used on computer circuits to protect the circuit from corrosion, which may result in a voltage drop.
Weave Bead
A type of weld bead made with transverse oscillation.
To shift vehicle weight in oval-track racing by raising or lowering the springs with small blocks or wedges.
Wedge Combustion Chamber
A combustion chamber resembling a wedge.
Wedge Head
A cylinder head with wedge-shaped combustion chambers to provide a large quench area.
Wedge-Actuated Brakes
A braking system that uses air pressure and air brake chambers to push a wedge and roller assembly into an actuator that is located between the adjusting and anchor pistons.
Wedge-Shaped Combustion Chamber
A type of combustion chamber that is shaped similar to a wedge or V, designed to increase the movement of air and fuel to aid in mixing.
Wedging Factor
A factor that takes into account the multiplication of force between the V-belt and pulley-groove surfaces that occurs because of the wedging action of the belt in the groove.
The exhaust headers on a drag racer that swoop close to the ground and to the rear.
Weekend Warrior
A part-time, weekend racer having a regular weekday job.
A tire.
Weight Distribution
The percentage of the vehicle gross weight on the front wheels and on the back wheels, or the percentage on each wheel.
Weight Mass
A concentration of weight around the tire; may or may not be equally distributed.
Weight Transfer
The momentary shift of a vehicle's weight forward or rearward.
Weight-Saver Spare tire
A compact spare tire.
Weight-To-Power ratio
The ratio of a vehicle's weight to its horsepower.
A localized merging of metals or nonmetals produced either by heating the materials to the welding temperature, with or without the application of pressure, or by the application of pressure alone and with or without the use of filler material.
Weld Axis
A line through the length of the weld, perpendicular to and at the geometric center of its cross section.
Weld Bead
A weld resulting from a pass.
Weld Crack
A crack located in the weld metal or heat-affected zone.
Weld Metal
The portion of a fusion weld that has been completely melted during welding.
Weld Pool
The localized volume of molten metal in a weld prior to its solidification as weld metal.
The capacity of material to be welded under the imposed fabrication conditions into a specific, suitably designed structure and to perform satisfactorily in the intended service.
A joining process that produces merging of materials by heating them to the welding temperature, with or without the application of pressure or by the application of pressure alone, and with or without the use of filler material.
Welding Arc
A controlled electrical discharge between the electrode and the work piece that is formed and sustained by the establishment of a gaseous, conductive medium.
Welding Filler Metal
The metal or alloy added in making a weld joint that alloys with the base metal to form weld metal in a fusion-welded joint.
Welding Rod
A form of welding filler metal, normally packaged in straight lengths, that does not conduct the welding current.
Welding Tip
That part of an oxyfuel gas welding torch from which the gases issue.
An assembly of two or more metal parts that have been joined by fusing metal with the application of heat.
Western Union Splice
The electrical connection made by paralleling the bared ends of two conductors and then twisting these bared ends, each around the other.
Wet Bulb
A device, such as a thermometer, having a wet sock over its sensing element.
Wet Liner
A cylinder liner that is in contact with the coolant.
Wet Sleeve
A term used for wet liner.
Wet Tank
A supply reservoir.
Wet-Bulb Temperature
The ambient temperature measured with a wet-bulb thermometer.
Wet-Disk Clutch
A clutch having a friction disk that operates in a bath of oil.
Whale Tale
A large, horizontal spoiler at the rear of a vehicle.
A circular frame or hub of an axle to which a tire is attached.
Wheel Adapter
A metal plate that permits the use of a wheel having a different bolt pattern.
Wheel Alignment
A condition where the wheels and tires are in proper position on the vehicle.
Wheel Balance
The equal distribution of weight of a wheel with a mounted tire.
Wheel Base
The distance from the center of the front wheels to the center of the rear wheels.
Wheel Cans
The wheel wells on a race car having a full width body.
Wheel Centerline
An imaginary line through the center of the tire, a vertical line if the tire is exactly in an upright position.
Wheel Cylinder
A hydraulic cylinder device at each wheel of a drum-brake system that transfers hydraulic pressure developed in the master cylinder to the brake shoes.
Wheel Cylinder piston
The device in a wheel cylinder that expands, causing the brake shoe to contact the drum.
Wheel Estate
A mobile home.
Wheel Meter
A chassis dynamometer.
Wheel Nut
Threaded nuts used to retain the wheel to the studs on the hub assembly.
Wheel Offset
The wheel rim offset from the center of the mounting flange.
Wheel Rebound
Downward wheel and suspension movement.
Wheel Rim
Circular steel, aluminum, or magnesium components on which the tires are mounted, manufactured from stamped, or pressed steel discs that are riveted or welded together to form the circular rim.
Wheel Shimmy
The wobbling motion during rotation of a dynamically unbalanced tire.
Rapid inward and outward oscillations of the front wheels.
Wheel Spindle
The spindle on which a wheel is mounted.
Wheel Tramp
The wheel-lifting action or hopping motion caused by static unbalance. Motion may be up-and-down or forward-and-backward, caused by centrifugal force acting on a heavy tire section located near the tread-face center.
Wheel Tubs
Wheel wells installed to accommodate oversized tires.
Wheel Weights
Weights used during the balancing process to equalize the weight mass around and across the tire; attached to the rim with clips or special adhesive.
Wheel-and-Axle Speed Sensors
Electromagnetic devices used to provide wheel speed information for an anti-lock brake system.
Wheel-Slip Brake-Control system
A system which automatically controls rotational wheel slip during braking.
Wheel-Slip Sensor
A device used in combination with the wheel slip brake- control system to sense the rate of angular rotation of the wheel(s) and transmit signals to the logic controller.
Wheel-Speed Sensor
A sensor on each wheel used to monitor speed for anti-lock braking systems.
A wheelstand, lifting the front wheels off the pavement.
Wheelie Bars
A pair of long bars with wheels extending from the rear of the vehicle to prevent wheelstanding.
A car.
White Flag
A signal to a closed-course race driver that she or he is about to begin the last lap.
A bump or dip severe enough to make a vehicle airborne in off- road racing.
Wide Ratios
A transmission setup with wide spreads between speeds.
Wide-Open Throttle (WOT)
Having the throttle wide open, at full speed.
Wide-Open-Throttle Cut-Out Relay
A relay that cuts power to the compressor clutch or other accessories during heavy acceleration.
A tire. Also, weenie.
Wienie Roaster
A jet-powered car for drag racing or lakes competition.
Great in performance and/or appearance.
A power-driven spool having a wire cable.
Wind Resistance
A term used for air resistance.
Wind Up
The tendency of the rear axle to rotate with the wheels during hard acceleration.
To rev an engine.
Windage Tray
A metal meshed screen in the oil pan to deflect oil away from the crankshaft.
Winded Time
A quarter-mile drag racing time recorded with the advantage of a tail wind.
The turns of wire around a core, as in a relay.
The three separate bundles in which wires are grouped in a stator.
A supercharger.
Window Net
A net in the window of the driver's door that serves as a restraining device to keep the driver's arm inside.
Window Regulator
In a power-window system, the device that converts rotary motion of the motor into the linear, vertical movement of the window.
The British term for windshield.
The forward-facing window in a vehicle.
Windshield Wiper
Mechanical arms that sweep back and forth across the windshield to remove water, snow, or dirt.
A wing-shaped spoiler.
Wing Nut
A nut having wing-like flanges for ease of installation and removal.
To defeat a competitor in a race.
Wiped Out
To be defeated in a race.
To crash.
A term used for windshield wiper.
Wire Cloth
A material that may be cut to size and used for filtration.
Wire Placement
The position and routing of wires on an automobile, determined by factory engineers to provide a safe, practical, and economical route.
Wiring Diagram
A map-like drawing that shows the wiring arrangement and colors of a vehicle wiring harness.
Wiring Harness
The major assembly of a vehicle's electrical wiring system.
Wiring Protective Devices
A device used to prevent damage to the wiring system by maintaining proper wire routing and retention with the use of special clips, retainers, straps, and supplementary insulators to provide additional protection to the conductor over what the insulation itself is capable of providing.
A term used for A-arm or A-frame.
With Tracer
A term that indicates a solid or dashed line of a contrasting color on wire insulation, used for identification purposes where many wires are involved.
Witness Lines
Lines scribed on the surface of adjacent parts prior to disassembly to ensure proper realignment when they are reassembled.
An unsteady movement off a normal axis.
Wobble-Plate Compressor
A term used for swash-plate compressor.
An acronym for Waste Oil Heating Manufacturers Association.
An acronym for World of Outlaws.
Woodruff Key
A half-moon-shaped key used to prevent a pulley or gear from turning on a shaft. Also known as half-moon key.
A vehicle having wood panel or simulated wood panel bodywork.
The change of position of an object against an opposing force.
The product of a force and the distance through which it acts.
Work Bench
Any bench on which work is done; usually having a vise and one or more drawers.
Work Hardening
The brittleness of a metal part due to stress from bending, hammering, or fatigue.
Working Chamber
An area in a shock absorber where the pressure and vacuum are produced.
Works Team
A factory-supported racing team.
World of Outlaws (WOO)
A spring car-racing organization.
A type of gear on which the teeth resemble large threads.
Worm and Sector
A type of steering-gear assembly that imparts a rotary motion to a straight-line motion.
Worm Bearing Preload
The adjustment of a work gear bearing to prevent or reduce backlash.
Worm Gear
The gear at the end of the steering column in a worm-and-sector steering system.
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.
An abbreviation for wide-open throttle.
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.
Wraparound Headers
Exhaust headers that fit closely to the engine block.
Wraparound Seat
A body-conforming bucket seat.
To twist.
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.
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