A rod operated by cams that opens and closes the valves in an internal combustion engine. A push rod is a part of an internal combustion engine that rests in the top of a valve lifter and goes up into the rocker arm. This rod, being hollow, also channels oil up from the lifter and out of the rocker arm. This oil cools the valve spring as well as lubricates the rocker arm.
SOLID
Forged
TUBULAR
Projection Welded
PRESS FIT
HLA