Glossary “major overhaul” Definition:
An engine overhaul just short of a rebuild, where all worn or damaged parts are rebuilt or replaced.

Glossary “major repairs” Definition:
Refers to the replacement of large body sections and frame straightening.

Glossary “major thrust surface” Definition:
The side of the piston that pushes against the cylinder wall during the power stroke.

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.

Glossary “major diameter” Definition:
1). Largest diameter of a cylinder. 2). The largest diameter of a bolt, its threads.