Bottom dead centre. The position of the crankshaft when the piston is at its lowest position in the cylinder. The crankshaft is at 180° of rotation from the top dead centre 0° position.

Part of the tyre.

Type of non-independent suspension.

Equipment used to check the alignment of vehicle headlights.

Half-round parts that holds the big end and main bearings into place either on the con rods or engine block.

The freeplay between a bearing shell and journal.

Applies to the applied grip of a split shell bearing when the two halves are tightened together.

Components used to support a shaft and allow rotation.

Cover over the clutch assembly. Usually joins the gearbox to the engine.

A benign condition is one that is not usually serious or harmful. Zero emissions for example.