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Coil Spring Spacer

A component made of aluminum or polyurethane that can provide a mild suspension lift for a vehicle that's fitted with coil springs.

Coil Tower

The high-voltage, center terminal of a conventional ignition coil.

Coil-on Plug Ignition System

An ignition system without a distributor where each spark plug has its own ignition coil.

Coil-over

A suspension component that features a shock absorber inside a coil spring.

Coil-preload Springs

Coil springs, located in the pressure-plate assembly, made of tempered-steel rods formed into a spiral that resists compression.

Coil-spring Clutch

A clutch that uses coil springs to hold the pressure plate against the friction disk.

Coil-spring Failures

The inability of a coil spring to compress and/or rebound, due to constant overloading, continual jounce and rebound action, metal fatigue, or a crack, break, or nick on the surface layer or coating.

Coil-spring Rear Suspension

A rear-axle assembly that is attached to the frame through a link-type suspension system. Coil springs are mounted between the lower suspension arms and the frame, while the shock absorbers are mounted between the back of the suspension arms and the frame.

Coil-spring Seat

The formed mounts that determine the coil-spring position on the car frame and rear axle housing. Seats may have sound-insulating pads.

Coilover

See coil-over.

Coke Bottle

The shape of an auto body tucked slightly inward at the center, like a Coca-Cola bottle.

COLA

An acronym for cost of living allowance.

Cold

1. An object that is not hot or warm, generally below body temperature, 98.6 F (37 C). 2. The absence of all heat, -259.67 F (-162 C).

Cold Air Intake System

A system that feeds air into an engine. It often draws cooler air from outside a vehicle, rather than from under the hood, since underhood air has been heated by the engine. Cooler air is denser than warmer air, so the cold air can be combined with more fuel to produce more power. Virtually all cold air intake systems are less restrictive than the stock systems they replace.

Cold Drawn

A process where metal is drawn or rolled into a particular shape or size.

Cold Inflation Pressure

The tire inflation pressure after a tire has been standing for three hours or driven less than one mile after standing for three hours.

Cold Manifold

An intake manifold that does not have a preheat passage.

Cold Patch

A process used to repair a punctured tire or tube, without the aid of heat.

Cold Rate

The number of minutes a battery will deliver 300 amperes at 0 F (-17.8 C), before the cell voltage drops to below 1.0 volt.

Cold Soak

To place a component or vehicle in a cool area to allow it to cool to ambient temperature .