A combustion mechanism that ignites fuel by using the heat derived from compressing air as an ignition source.

The immediate care given to an injured or suddenly ill person.

Flat metal strips used to measure the width of gaps, such as the clearance between valves and rocker arms.

The highest point the piston travels in a cylinder.

The coarseness or fineness of a thread as measured by the distance from the peak of one thread to the next, in threads per inch.

The twisting force applied to a shaft that may or may not result in motion.

Torque method that involves an initial torque followed by turning an additional amount of degrees.

Largest structure of an engine , which encloses the cylinders and provides a rigid frame to support the cylinders or cylinder liners.

The leakage of air past the piston rings into the crankcase.

A measure of the maximum pressure of engine cylinders when cranking.

A cylinder wall finish of fine intersecting lines that are used to retain oil.

A two-piece piston design that uses a separate aluminum skirt connected to an alloy steel crown through a piston pin.

The operation of an engine after it is initially assembled or rebuilt when piston ring, cylinder wall, bushing and bearing surfaces have high initial wear as the moving surfaces conform to each other.

A condition where dirt is draw into an engine; this causes premature abrasive wear of the cylinder walls and rings.

A one-piece piston design made entirely of alloyed steel, which has a compact height and a large reduction of material between the skirt and crown.

A piston design that is dimensionally longer that it is wide, with a full piston skirt.

A condition that occurs when fluids in the cylinder of an engine prevent the engine from rotating.