Lifters consist of a body, plunger, spring, check ball and retainer, rod seat, and
a snap ring. The body has an oil inlet hole, which allows engine oil into the plunger.
The plunger has a feedhole on the bottom. When the lifter is expanded, oil fills
the lifter. As the cam reaches its peak, and compresses the plunger, the check
ball blocks the oil from escaping. Since fluids cannot be compressed, the lifter