Glossary “smoke gun” Definition:
Device used to find air leaks around doors and windows. Also used to find vacuum leaks at the engine or leaks in the EVAP system.
smoke
Glossary “smoke” Definition:
The color of the vapor coming out of the vehicle’s exhaust system.
smog test
Glossary “smog test” Definition:
Term used for smog check.
smog pump
Glossary “smog pump” Definition:
An air-injection system pump.
smog check
Glossary “smog check” Definition:
To measure the emissions level of a vehicle’s exhaust gases.
smog
Glossary “smog” Definition:
Air pollution, especially the photochemical variety formed when sunlight causes a chemical reaction between NOx and HC, resulting in the formation of ozone and other compounds smog is a conjunction of smoke and fog.
SMEC
Glossary “SMEC” Definition:
Single Module Engine Controller: This computer system was introduced by Chrysler in mid 1987
SME
Glossary “SME” Definition:
Society of Manufacturing Engineers
SMC
Glossary “SMC” Definition:
Sheet Molded Compounds
smart driver
Glossary “smart driver” Definition:
A PCM output driver that can detect faults (open or shorts) on its output circuit.
smart card
Glossary “smart card” Definition:
A small electronic device about the size of a credit card that contains electronic memory, and or programming.
small hole gauge
Glossary “small hole gauge” Definition:
Functions in the same manner as the telescoping gauge. It is expanded in a bore, and then measured with an outside micrometer. Commonly used to determine the diameter of valve guides.
small block (SB)
Glossary “small block (SB)” Definition:
A V-8 engine of 400 cid (6.5 liters) or less.
slugging
Glossary “slugging” Definition:
1). The return of liquid refrigerant or oil to the compressor. 2). The act of adding a separate piece(s) of material in a joint before or during welding that results in a welding joint not complying with design, drawing or specification requirements.
slug
Glossary “slug” Definition:
A piston.
sludge
Glossary “sludge” Definition:
1). A muddy appearing deposit formed by contamination and chemical action on liquids; can clog openings and/or passages. 2). A buildup of combustion by-products that can clog oil lines and interfere with proper lubrications.
SLP
Glossary “SLP” Definition:
Selection Lever Position
slow reverse
Glossary “slow reverse” Definition:
A simple planetary gear combination with sun gear as input, planetary carrier held, and ring gear as output.
slotted nut
Glossary “slotted nut” Definition:
Also known as a castellated nut, it is grooved on top, so that a safety wire or cotter pin can be installed into thehole on the bolt, preventing turning.
slope
Glossary “slope” Definition:
The numerical ratio or proportion of rear drum brake pressure to full system pressure that is applied through a proportioning valve.