Glossary “oxidation catalyst” Definition:
A two-way catalytic converter which promotes the oxidation of HC and CO in an engine’s exhaust stream, as distinguished from a three-way or reduction catalyst.
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oxidation inhibitor
Glossary “oxidation inhibitor” Definition:
Additive that are added to reduce the reaction of chemicals in gasoline that react to oxygen.
OWL
Glossary “OWL” Definition:
Overheat Warning Lamp
owner's manual
Glossary “owner’s manual” Definition:
Booklet that comes with a new vehicle.
oxalic acid
Glossary “oxalic acid” Definition:
Mild acid used to remove industrial fallout stains from painted surfaces.
oxidation
Glossary “oxidation” Definition:
1). The process in which one element of a compound is combined with oxygen in a chemical process that produces another compound. 2). The combination of a substance with oxygen forming an oxide, such as rust.
overspray leak
Glossary “overspray leak” Definition:
Term that describes the results of not properly sealing the masking paper or plastic and getting overspray on unwanted surfaces.
oversquare
Glossary “oversquare” Definition:
Cylinder with a bore greater than its stroke.
oversteer
Glossary “oversteer” Definition:
Condition in cornering when the rear wheels of a vehicle tend to break loose and slide outward.
overvoltage protection relay
Glossary “overvoltage protection relay” Definition:
Electrical device used in ABSs that prevents damage to electronic components and circuits due to electrical surges or spikes.
OVPR
Glossary “OVPR” Definition:
Over Voltage Protection Relay; an electrical device used in ABSs that prevents damage to electronic components and circuits due to electrical surges or spikes.
oversize valve stem
Glossary “oversize valve stem” Definition:
Valve having a stem diameter that is larger than the stem diameter of the original valve. It is used to fit a worn valve guide that is reamed oversize.
overspray
Glossary “overspray” Definition:
1). Paint spray mist that drifts onto a surface where it is not wanted. 2). The overlap of new paint over old paint.
oversize (OS)
Glossary “oversize (OS)” Definition:
Part that is larger than the original to make up for wear and matching.
oversize bearing
Glossary “oversize bearing” Definition:
Bearing made thicker than standard. It has a larger outside diameter to fit an oversized bearing bore.
overrev
Glossary “overrev” Definition:
To run an engine at excessive rpm.
overrunning clutch
Glossary “overrunning clutch” Definition:
Device used when two members are to run freely relative to each other in one direction, but are to lock in the other direction.
overrunning clutch drive
Glossary “overrunning clutch drive” Definition:
An overrunning clutch used for the engagement and disengagement of a starting motor.
overplate
Glossary “overplate” Definition:
Material added to the surface of the bearing lining to improve conformability and embeddability. Only the harder, heavy duty bearing alloys need overplates.
overpull
Glossary “overpull” Definition:
Pulling of a body member beyond its specifications with the expectation that it will snap back to its intended shape when the pulling effort is discontinued.