Automotive Glossary

Automotive Glossary

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Weight Solids

The percentage on a weight basis, of non-volatile (i.e. the ingredients that will not evaporate) material in a paint.

Weight Transfer

The shift of a vehicle's weight towards the front when braking and towards the rear during rapid acceleration.

Welch Plug

A dished steel disc used as a core plug in engines and cylinder heads.

Wet Clutch

A friction clutch that runs in an oil bath.

Wet Film Gauge

A device used to determine wet film thickness of paint immediately after application. This is obviously a type of destructive test, as the paint surface is damaged by the gauge.

Wet Liner

Not strictly a liner as it does not line a cylinder, but is the cylinder of a water cooled engine that fits into the cylinder block in contact with the coolant.

Wet Sanding

A technique involving the sanding of a surface while it is being flushed with water. This aids with the smoothing out of surface defects before subsequent coats are applied.

Wet Spots

Discolouration caused where the paint fails to dry and adhere uniformly.

Wet Sump (Oil Pan)

An engine lubrication system where the reservoir of lubricating oil is held in a sump below the engine. As distinct from a dry sump where the reservoir of lubricating oil is kept in a separate tank.

Wet-on-Wet Application

A painting method by which a second coat of paint is applied over the first before it hardens and dries. Special primers have been developed which allow for colour to be applied on top of them with little or no flash-off time

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