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A rocker arm transfers motion from the camshaft to the valves, facilitating their opening and closing to allow air-fuel mixture intake and exhaust gas expulsion.

Symptoms include ticking or tapping noises from the engine, misfires, reduced engine performance, and irregular valve movement.

Operating a vehicle with a damaged rocker arm can lead to further engine damage and decreased performance. It's advisable to have it inspected and repaired promptly.

Replacing a rocker arm involves removing the valve cover, loosening the rocker arm assembly, and installing a new rocker arm. This procedure should be performed by a qualified technician to ensure proper installation and adjustment.