Glossary “smog test” Definition:
Term used for smog check.
s
smoke
Glossary “smoke” Definition:
The color of the vapor coming out of the vehicle’s exhaust system.
smoke gun
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.
smog pump
Glossary “smog pump” Definition:
An air-injection system pump.
SME
Glossary “SME” Definition:
Society of Manufacturing Engineers
SMEC
Glossary “SMEC” Definition:
Single Module Engine Controller: This computer system was introduced by Chrysler in mid 1987
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.
smog check
Glossary “smog check” Definition:
To measure the emissions level of a vehicle’s exhaust gases.
smart driver
Glossary “smart driver” Definition:
A PCM output driver that can detect faults (open or shorts) on its output circuit.
SMC
Glossary “SMC” Definition:
Sheet Molded Compounds
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.
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 block (SB)
Glossary “small block (SB)” Definition:
A V-8 engine of 400 cid (6.5 liters) or less.
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.
slug
Glossary “slug” Definition:
A piston.
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.
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.
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.
slow reverse
Glossary “slow reverse” Definition:
A simple planetary gear combination with sun gear as input, planetary carrier held, and ring gear as output.
SLP
Glossary “SLP” Definition:
Selection Lever Position