Glossary of Auto Terms

DriverSide's Car Dictionary has the most comprehensive definitions of automotive terms. This auto glossary can help you decipher what your mechanic is fixing and what the purpose or function of the particular auto part or accessory is for. We have taken the mystery out of automotive service jargon, so that you don't have to.

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Rings

Metal rings located in grooves near the top of the piston. The rings facilitate high compression and keep oil from leaking into the combustion chamber.



See Also:
Timing Belt
Gear Ratio
Drivetrain
Timing
Differential
Rear Axle Ratio
Diesel Engine
Overhead Cam

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