Glossary “manifold skin temperature sensor” Definition:
Located on the outside surface of the intake manifold, its signal data is send to the compuvalve for A/F density calculations on bi-fuel vehicles.
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manifold absolute pressure sensor
Glossary “manifold absolute pressure sensor” Definition:
Variable resistor used as a sensor to signal an engine control computer, signals relative to the vacuum conditions in the intake manifold.
manifold air temperature
Glossary “manifold air temperature” Definition:
The temperature of the intake stream in the intake manifold, as increased by a heat riser or an Early Fuel-Evaporation system, and/or converted to an engine-control computer input by a sensor.
manifold charge temperature
Glossary “manifold charge temperature” Definition:
See air charge temperature.
manganese steel
Glossary “manganese steel” Definition:
A steel alloy with 12-14% manganese; used for drill bits
manifold
Glossary “manifold” Definition:
1). Device used to hold two or more gauges, with passages and flow provisions; used for testing and servicing purposes. 2). A conduit-like device used to channel the A/F mixture into an engine. 3). A conduit-like device used to duct the exhaust gas out of an engine.
manifold absolute pressure (MAP)
Glossary “manifold absolute pressure (MAP)” Definition:
The pressure in an intake manifold relative to atmospheric pressure.
malfunction
Glossary “malfunction” Definition:
1). An improper or incorrect operation of a device or system. 2). The failure to work or perform.
malfunction indicator lamp (MIL)
Glossary “malfunction indicator lamp (MIL)” Definition:
Amber dashboard warning light may be labeled “check engine” or “service engine soon”
malleability
Glossary “malleability” Definition:
Ability of a metal to be formed through hammering or bending.
manganese
Glossary “manganese” Definition:
An element (Mn), used in alloys of iron, steel, aluminum, and copper, often confused with magnesium (Mg).
manganese bronze
Glossary “manganese bronze” Definition:
An alloy of copper, zinc, and up to 3.0% manganese used for toothed wheels and gears.
male
Glossary “male” Definition:
Term universally applied to any part which fits into another part, such as the shaft on which a pulley or gear hub fits.
male and female
Glossary “male and female” Definition:
Terms that apply to inner and outer members which fit together, such as a bolt and nut.
major overhaul
Glossary “major overhaul” Definition:
An engine overhaul just short of a rebuild, where all worn or damaged parts are rebuilt or replaced.
major repairs
Glossary “major repairs” Definition:
Refers to the replacement of large body sections and frame straightening.
major thrust surface
Glossary “major thrust surface” Definition:
The side of the piston that pushes against the cylinder wall during the power stroke.
major tune-up
Glossary “major tune-up” Definition:
A conventional, ignition-engine maintenance procedure that may include points, capacitor cap, rotor, plugs, plug wires, valve adjustment, and a carburetor overhaul.
make
Glossary “make” Definition:
1). To close a switch. 2). A distinctive name given to a group of cars by a manufacturer, such as Riviera, by Buick.
make and break
Glossary “make and break” Definition:
1). The term used when a switch is closed or opened. 2). A pair of contact points, one stationary, and the other operated by a cam that makes and breaks, such as in a conventional distributor. 3). To construct something then tear it down.