Automotive Glossary


Automotive Glossary

Browse the glossary using this index

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O

Offset

Any point that is not on the axis of shaft or component.

OHC

Overhead cam - type of valve operating gear. Camshaft in cylinder head above the valves.

Ohm

Electrical unit of resistance.

Ohm's Law

The electrical law, named after its originator, that shows the relationship between electrical pressure in volts, electrical current in amps and the electrical resistance in Ohms is proportional. Volts is equal to amps multiplied by Ohms.

Ohmmeter

A meter for measuring Ohms, the standard unit for electrical resistance.

OHV

Overhead valve - type of valve operating gear. Camshaft in cylinder block connected to valves by push rods and rockers.

Oil Cooler

A small heat exchanged (radiator), which has oil pumped through so that a flow of air will cool it.

Oil Dilution

The thinning of engine oil by fuel flowing down the cylinder walls into the oil pan.

Oil Drillings

Holes through various engine components, such as the crank, to allow oil to flow.

Oil Pan

Sump that holds oil for lubricating the engine.


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