6. CYLINDER HEAD/VALVES DOWNTOWN 125i DISASSEMBLY Take out the valve rocker arm shafts Remove the valve rocker arms. Rocker Arm Shafts INSPECTION Camshaft Holder Inspect the camshaft holder, valve rocker arms and rocker arm shafts for wear or damage. If the valve rocker arm contact surface is worn, check each cam lobe for wear or damage. Rocker Arm Shafts Rocker Arm Bore Inspect the rocker arm bore, cam lobe contact surface and adjuster surface for wear/pitting/scratches/blue discoloration. If any defects are found, replace the rocker arm shaft with a new one, then inspect lubrication system. Adjuster Surface Contact Surface 6-6