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Low-suction Pressure

Pressure that is lower than normal in the suction side of the system due to a malfunction of the unit.

Lower

To reduce the ride height of a vehicle by modifying its suspension.

Lower A-arm

The lower member of a double A-arm suspension system.

Lower Control Arm

A front suspension component connected between the pivoting attachment point on the car frame and the lower ball joint, which is fastened to its outer end.

Lower End

The crankshaft, main bearings, and connecting rod bearings assembly in an engine.

Lower Entry

The bottom of a wet cylinder sleeve in an engine block.

Lower Entry Sleeve

A cylinder sleeve used to repair a lower entry.

Lower Heating Value (LHV)

The latent heating value of water that is exhausted as steam.

Lower Mount

A support for the engine or transmission that is below the crankshaft centerline.

Lower Radiator Hose

The radiator hose from the outlet of the radiator to the inlet of the water pump.

Lowering Block

A device that may be used to reduce the riding height of certain vehicles.

Lowest Achievable Level (LAL)

A term used to define the lowest amount of emission permitted for any substance considered toxic or otherwise hazardous.

LP

Liquid propane.

LPG

An acronym for liquified petroleum gas.

LPO

An acronym for limited-production option.

LPV

An acronym for load-proportioning valve.

Lr

Lawrencium An element with the atomic number of 103.

LRDM

Acronym for Left Rear Door Module (GM).

LSA

Acronym for Left Side Airbag (Chrysler).

LSR

An acronym for land speed record.