- S -

Smog Check

To measure the emissions level of a vehicle's exhaust gases.

Smog Motor

A vehicle engine with exhaust emissions controls.

Smog Pump

An air-injection system pump.

Smog Test

A term used for smog check.

Smoke

1. To defeat a racing competitor. 2. The color of the vapor coming out of the vehicle's exhaust system.

Smoke In Exhaust

A visible blue or black substance often present in the vehicles exhaust.

Smoke It Over

To discuss, analyze, and give careful consideration to a concept, idea, or problem.

Smoke Off

To leave the staring line in a drag race with the rear wheels smoking.

Smoker

A vehicle that has an engine that smokes excessively.

Smoking Rules

Rules concerning smoking, such as, NO SMOKING or SMOKING ONLY IN DESIGNATED SMOKING AREAS. Fumes in the shop may be ignited if these rules are not followed.

Smoothed

A body panel with trim removed and the holes filled.

Sn

Tin An element with the atomic number of 50.

SNAP

An acronym for Significant New Alternatives Policy.

Snap Ring

A circular retaining clip used inside or outside a shaft or part to secure a shaft, such as a floating wrist pin.

Snap-On

A tool manufacturer.

Snapshot

A feature of OBD-II that shows, on various scanners, the conditions that the vehicle was operating under when a particular trouble code was set.

Snell Foundation

An organization that sets safety standards for racing helmets that are adhered to by most race-sanctioning bodies.

Sniffer

An exhaust-gas analyzer used in making a smog check.

Snipe

A pipe that is placed on a wrench to increase leverage; generally an unsafe practice.

Snorkel Tube

A long, narrow tube attached to the air cleaner, used to direct air into the air filter.