44GB476
Engine Rocker Arm
Mack

The engine rocker arm is a critical component in the valve train, responsible for transferring camshaft motion to open and close the engine’s valves. Its precise operation directly influences engine timing, power output, and fuel efficiency. Constructed from durable materials, it withstands high stresses and thermal cycles typical in heavy-duty engines. Proper lubrication and timely inspection are essential to prevent wear and ensure smooth operation. A malfunctioning rocker arm can cause misfires, reduced engine performance, or damage, emphasizing its importance in routine engine maintenance. Source One Parts Center offers high-quality rocker arms that meet OEM specifications, helping you maintain reliable engine performance.