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Suction Line

1. The line connecting the evaporator outlet to the compressor inlet. 2.A low-pressure line in a system usually used as a return line.

Suction Manifold

The point where vapor enters a compressor.

Suction Pressure

Compressor inlet pressure.

Suction Service Valve

A term used for low-side service valve.

Suction Side

That portion of a system that is under low pressure.

Suction Throttling Valve

A back-pressure regulated device that prevents freeze-up of the evaporator core.

Suction-line Regulator

A device used to regulate the pressure in the suction line.

Suicide Doors

Vehicle doors that are hinged at the rear and open from the front.

Suicide Front Axle

A special spring and front axle design for early Fords.

Suicide Front End

A term used for suicide front axle.

Sulfated Battery

A battery condition where sulfate has built up on the plates to the extent that it can no longer be charged.

Sulfation

The lead sulfate that builds up on a battery as a result of battery action that produces electric current.

Sulfur Oxides

Small amounts of acids (Sox) that forms as a result of a reaction between the hot exhaust gas and the catalytic converter catalyst.

Sulfuric Acid

An electrolyte used in batteries.

Sump

1. The bottom part of some compressors that contains oil for lubrication of the moving parts of the air conditioning compressor. 2. The reservoir for oil at the bottom of an engine. 3. The oil pan, or reservoir, that contains a supply of fluid for the transmissions hydraulic system.

Sun Gear

Central gear of the planetary gearset around which the other gears rotate.

Sunload

Heat intensity and/or light intensity produced by the sun.

Sunload Sensor

A sensor placed on the dashboard to determine the amount of sun coming into the vehicle; a device that senses heat and/or light intensity.

Supe

A term for supercharger.

Super Car

1. A term used for the early muscle car. 2. An ultra-powerful, expensive, limited edition vehicle such as a Ferrari.