Glossary “bobbed” Definition:
Trimmed and shortened.
b
bobweight
Glossary “bobweight” Definition:
The weight attached to a rod journal to simulate the reciprocating mass when balancing a crankshaft.
BMC
Glossary “BMC” Definition:
Brake Manufacturers Council.
BM/GM
Glossary “BM/GM” Definition:
Base Module or General Module
BMAP
Glossary “BMAP” Definition:
Barometric & Manifold Absolute Pressure
B/MAP
Glossary “B/MAP” Definition:
A Manifold Absolute Pressure Sensor that includes Barometric Pressure measurment
blown head gasket
Glossary “blown head gasket” Definition:
A head gasket that leaks water, oil, or air and reduces engine performance.
blue book
Glossary “blue book” Definition:
A term given the Kelly Blue Book, a bimonthly publication that lists used car wholesale and retail prices.
blue smoke
Glossary “blue smoke” Definition:
An exhaust produced when oil has contaminated the air/fuel mixture.
blueprint
Glossary “blueprint” Definition:
To rebuild an engine to original equipment manufacturer (OEM) design specifications.
bluing
Glossary “bluing” Definition:
A fluid that produces a blue surface on metal to assist in laying out work on it.
blwr
Glossary “blwr” Definition:
Acronym form of Blower
blower motor
Glossary “blower motor” Definition:
An electric motor and squirrel cage type of fan, moving air inside the vehicle for heating, cooling, and defrosting.
blower motor relay
Glossary “blower motor relay” Definition:
Relay found in the blower circuit.
blower relay
Glossary “blower relay” Definition:
Electrical device used to control the function or speed of a blower motor.
blower speed controller
Glossary “blower speed controller” Definition:
Solid-state control device that operates the blower motor and, sometimes, the compressor clutch based on signals from the microprocessor.
blower switch
Glossary “blower switch” Definition:
Dash-mounted device that allows the operator or turn the blower motor ON/OFF and/or to control its speed.
blown engine
Glossary “blown engine” Definition:
1). An engine that has a supercharger or turbocharger. 2). A seriously damaged engine.
blower circuit
Glossary “blower circuit” Definition:
All of the electrical components that are required for heater and A/C blower and blower speed control.
blowby
Glossary “blowby” Definition:
Byproducts of combustion, mostly HC, that leak out of the combustion chamber, past the piston ringsand into the crankcase during the compression and power strokes. These blowby vapors are drawn into the intake through the PVC system and are burned in the engine.