Which component rotates the inner mark to adjust and align with the desired timing mark?

• A. Adjustable Cam Gear
• B. Camshaft
• C. Pushrod
• D. Lifter

Answer: (A)

The timing system relies on aligning marks between the crank gear and the cam gear. An adjustable cam gear has an inner section that can rotate independently of the outer gear. By turning this inner portion, you change the cam’s alignment relative to the crank, effectively advancing or retarding the valve timing until the marks line up with the desired specification. The camshaft simply carries the cam lobes and drives the valves, while pushrods and lifters transfer motion from the cam to the valves; they don’t adjust timing marks.