Valve-actuating component that translates pushrod motion into valve movement?

Prepare for the Engineman EN A School Test 1. Utilize flashcards and multiple choice questions with detailed explanations to boost confidence and readiness for the test.

The rocker arm is the component that translates pushrod motion into valve movement. In an engine with pushrod actuation, the camshaft lobes push lifters, which push the pushrod upward. The pushrod then contacts the rocker arm, causing it to pivot on its fulcrum. This lever action pushes down on the valve stem (or lifts it, depending on the valve side), opening the valve. The lifter’s role is to follow the cam, while the camshaft provides the motion and the timing belt simply drives the camshaft.