What is rocker arm?

A rocker arm is a component of an internal combustion engine that is used to transfer the motion of the camshaft to the valves. It is typically made of hardened steel and is mounted on a pivot point that allows it to move up and down.

The rocker arm is an essential part of the valve train system in an engine, as it helps open and close the valves at the correct time in the combustion cycle. When the camshaft lobe pushes against the rocker arm, it causes the arm to pivot and push down on the valve stem, opening the valve to allow air and fuel into the combustion chamber.

Rocker arms are designed to withstand high levels of stress and can be prone to wear and tear over time. Regular maintenance and inspection of the rocker arms are necessary to ensure they are functioning properly and to prevent any potential engine issues.

There are different types of rocker arms, including roller rocker arms, stud-mounted rocker arms, and shaft-mounted rocker arms, each with its own advantages and applications. Proper selection and installation of the rocker arms are crucial for optimal engine performance and longevity.