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Clad

A metal or material covered with another metal by bonding.

Clad Metal

A metal that is covered with another metal or alloy of different composition, applied to one or both sides by casting, drawing, rolling, surfacing, chemical deposition, or electroplating.

Cladding

The application of a surfacing material to impair corrosion and/or heat resistance.

Clamp

A screw-, cam-, or lever-actuated device for temporarily holding parts together.

Clamp On

A mounting design that uses bolts or clamps to attach a product. As opposed to a mounting system that requires you to drill into your vehicle.

Clamping Diode

A diode that is connected in parallel with a coil to prevent voltage spikes from the coil from reaching other components in the circuit

Class

A group of competition cars with basically the same specifications and performance potentials.

Class 2

The type of digital data stream used on non-OBD-II diagnostic systems. Class 2 uses two-bit pulse widths and toggles between o (passive) and 7 volts (active)

Class F Red Insulating Enamel

A paint that is used to seal the interior of an engine and to aid in rapid oil return to the crankcase.

Classic

1. A fine car. 2. An important racing event, such as the Indy 500. 3. Certain cars built between 1925 and 1948.

Classic Car

A term usually used to describe a prewar car (i.e., one built before World War II). Some people use the term more loosely to describe any collectible or vintage vehicle.

Classic Car Club Of America (CCCA)

An organization that is dedicated to the preservation of specific American and European luxury cars manufactured between 1925 and 1948.

Classifying Vehicles

Any or all of the methods used to classify vehicles, such as by weight or fuel consumption. See the appropriate heading for a specific definition.

Clay Bar

A car care product that acts like a big eraser. It removes surface contaminants (including bugs, road tar, water deposits, industrial fallout, door ding paint marks, paint overspray and tree sap) without scratching the paint. Usually used with—and sold with—some kind of lubricant.

CLC

Converter lock-up clutch

CLCC

Closed loop carburetor control

Clean

1. To flush. 2. To purge. 3. Free of dirt, grime, or grease.

Clean Air Act

A term used for Clean Air Act and its Amendments (CAAA). A Title IV amendment, signed into law in 1990 by President George Bush, that established national policy relative to the reduction and elimination of ozone-depleting substances. The act also includes requirements for oxygenated fuels programs in CO non-attainment areas and reformulated gasoline programs in certain ozone non-attainment areas.

Clean Air Performance Professionals (CAPP)

An association of repair shops and technicians promoting inspection and maintenance programs to help protect our environment.

Clean Room

An enclosed, ventilated or air-conditioned area, free of airborne particles where delicate components, such as engines and automatic transmissions, can be assembled with minimal risk of contamination.