- B -

Blueprint

To rebuild an engine to original equipment manufacturer (OEM) design specifications.

Bluing

A fluid that produces a blue surface on metal to assist in laying out work on it.

BM/GM

A Mercedes acronym for Base Module or General Module

BMAP

Barometric & manifold absolute pressure

BMC

An acronym for Brake Manufacturers Council.

Bmep

An acronym for brake mean efficient pressure.

BMS

Bi-metallic sensor

BMW

Bavarian Motor Works

Bn

Brown.

BNC Connector

A type of connector used on digital and analog scopes. Named for its inventor Baby Neil Councilman

BOB

An acronym for Break-Out-Box. A box placed in series between the power train control module and the wiring harness to provide a place to back probe the system and monitor the circuit voltage.

Bobbed

Trimmed and shortened.

Bobtail

1. A vehicle body with sw short-rear overhang. 2. The tractor of a tractor-trailer rig. 3. The results of a modification of a fad car.

Bobweight

The weight attached to a rod journal to simulate the reciprocating mass when balancing a crankshaft.

Body

The assembly of sheet metal sections and other parts that provide the enclosure of a vehicle.

Body And Frame

The parts of a vehicle that support all components. A frame that supports the engine and drive train and a body that houses the entire vehicle.

Body Armor

Body Color

The exterior paint color of a vehicle. Many specialty accessories can be painted body color to blend in with a vehicle for a semless, "factory" look. Some people also remove chrome, stainless and other bright trim pieces and bumpers -- or cover them with body color accessories -- to give their vehicle a monochromatic look.

Body Control Module (BCM)

A component of self-diagnostic systems used to control vehicle function based on monitored inputs.

Body Filler

A bodywork product that is designed to fill in scratches or low areas on a vehicle's sheetmetal. After the filler dries, it can be sanded so the area is even with the surrounding sheetmetal.