Glossary “Lexan” Definition:
Trade name for the shatterproof, heat-resistant clear plastic used in race-car rear windows.
l
LF
Glossary “LF” Definition:
Left Front
level control
Glossary “level control” Definition:
Term used for automatic level control.
leverage
Glossary “leverage” Definition:
The use of a lever and fulcrum to create a mechanical advantage, usually to increase force applied to an object. The brake pedal is the first point of leverage in a vehicle brake system.
let down panel
Glossary “let down panel” Definition:
A test panel used to determine the color match and the number of coats required to match a multi-stage finish.
LEV
Glossary “LEV” Definition:
Low Emissions Vehicles
level
Glossary “level” Definition:
1). To be on a horizontal plane. 2). The amount of liquid in a system.
left hand thread
Glossary “left hand thread” Definition:
Thread pattern on a bolt or nut that requires it to be turned to the left or counter-clockwise for tightening.
lemon law
Glossary “lemon law” Definition:
Federal and state laws that assure customer satisfaction for repairs to new vehicles by the dealer or replacement by the manufacturer.
length-to-diameter ratio
Glossary “length-to-diameter ratio” Definition:
Ratio of a coil spring wire diameter to its overall length, a measure of the spring’s effectiveness.
Lenz's Law
Glossary “Lenz’s Law” Definition:
Hinrich Lenz ( 1804 – 1865 ). A Russian Physicist who in 1833 formulated Lenz’s Law, a fundamental law of electromagnetism. He also found that the strength of a magnetic field is proportional to the strength of the magnetic induction.
lean roll
Glossary “lean roll” Definition:
To turn carburetor idle mixture screws in enough to effect a slight rpm drop, causing a leaner mixture. This can cause the idle speedrise and fall, causing the idle to roll.
LED
Glossary “LED” Definition:
Light Emitting Diode
lean misfire
Glossary “lean misfire” Definition:
Condition caused by a vacuum leak or open EGR valve, that results in incomplete combustion, causing one or more cylinders to pass unburned fuel into the exhaust system, resulting in an increase in hydrocarbon (HC) emissions.
lean mixture
Glossary “lean mixture” Definition:
A/F mixture with too much air, having more than 14.7 parts of air for each part of fuel (by weight).
lean out
Glossary “lean out” Definition:
1). To increase the portion of air or decrease the portion of fuel in an A/F mixture. 2). To decrease the portion of nitro in a fuel mixture.
lean
Glossary “lean” Definition:
Term often used for lean mixture or lean out.
lean A/F mixture
Glossary “lean A/F mixture” Definition:
Condition in which the ratio of air to fuel contains more oxygen than is nneded to completely burn the quanity of fuel.
Lean Burn
Glossary “Lean Burn” Definition:
A Chrysler electronic engine control that appeared in the mid 1970’s. It maintains precise control of the spark timing to allow a very lean mixture to burn properly, reducing emissions using an analog computer.
Leak Find
Glossary “Leak Find” Definition:
Trade name for a dye solution that can be injected into a system to find difficult leaks.