The engine camshaft is a cylindrical shaft driven by the crankshaft and equipped with elliptical lobes positioned at defined intervals and angles. These lobes actuate the valves by acting on lifters, pushrods, rocker arms, and the valve stem, precisely regulating valve opening and closing.
Timing system components work in synergy and ensure precise timing and reliable engine operation under all conditions:

• The engine camshaft pinion is the essential gear that transmits motion from the crankshaft to the camshaft, ensuring precise timing and optimal airflow.
• The engine camshaft bearing provides low-friction support for smooth rotation, helping the engine timing gear system and camshaft gear train maintain accuracy and engine stability.
• The engine tappets transfer the cam profile movement to the valvetrain, also providing low-friction operation to maintain precise timing and engine stability.