Beginning of Essay
What really makes a car go? There are many parts to an engine that are visible, like an alternator, starter, hoses, wires and a bunch of other things. But what is in the inside and how does it work? The process is really just a mixture of parts, moving in sync ....

Middle of Essay
.... up on a push rod when the lobes are rotating. A push rod, which is connected to a rocker arm, then "rocks" down on a spring that in turn pushes open a valve. This all happens due to the rotation of the camshaft which is geared to the crankshaft (which is connected to the pistons) which is all part of the four stroke cycle. The four-stroke cycle starts with the intake stroke. On the intake stroke, the piston moves down from its top dead center or the farthest "up" position creating a partial vacuum which draws in the fresh air-fuel mixture from the open intake valve. Think of the vacuum like a syringe with no needle. "If you put your finger ove ....