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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