Glossary “main jets” Definition:
Nozzle(s) in a carburetor that provides fuel during part or full throttle operation.

Glossary “main journals” Definition:
Journals that fit into the engine block to support the crankshaft.

Glossary “main leaf” Definition:
Usually the top leaf on multiple-leaf springs that provides the main vehicle support and contains the spring-mounting “eyes.”

Glossary “main body structural components” Definition:
The assembly made up of the dash panel, underbody, roof, body panels, doors, and deck lid to form the passenger and luggage compartments.

Glossary “main bearings” Definition:
Bearings that locate and support the crankshaft in an engine block.

Glossary “main cap” Definition:
Structural device that holds the crankshaft in place in an engine block.

Glossary “main bearing journal” Definition:
The parts of the crankshaft on which it rotates in the cylinder block.