Genuine BMW - Mini 11-33-7-631-589 Rocker Arm

This Genuine BMW - Mini rocker arm is an OEM replacement component designed for the valvetrain assembly in BMW N20, N26, N52, N54, and N55 engines, as well as select Mini Cooper engines. The rocker arm is a critical valve control component that transfers motion from the camshaft to open and close the intake and exhaust valves.

Function and Design:

• Works in conjunction with camshafts and valves to control valve timing
• Features a roller design that rides on the camshaft lobes
• Applies precise pressure to open and close engine valves in proper sequence
• Operates in a teeter-totter motion as the camshaft rotates
• Mounts on rocker arm shafts above the valve stems

Quality and Reliability:

As a genuine BMW - Mini part, this rocker arm meets OEM specifications for fitment, durability, and performance. Rocker arm failure can result in engine noise, rough running, reduced performance, and potential camshaft damage. Regular inspection and replacement when worn ensures proper valve operation and prevents costly engine damage.

Service Notes:

• Replacement recommended during camshaft installation to prevent uneven wear
• Priced individually; multiple units required per engine
• Consider inspecting rocker arm shafts and valve adjustment during replacement
• New cylinder head gasket recommended if cylinder head is removed for access