Cooper S (R53) L4-1.6L SC (W11) (2004)
Rocker Arm Assembly: Service and Repair
Removing And Installing/replacing Rocker Arm Shaft
Disconnect battery.
Remove cylinder head cover. See: Cylinder Head Assembly/Valve Cover/Service and Repair
Remove rocker shaft/camshaft bearing cap bolts gradually in sequence (10-1 ).
Install hint:
Tighten rocker shaft/camshaft bearing cap bolts gradually in sequence (1-10).
Stage 1:
Hand tighten evenly.
Stage 2:
Rocker arm shaft to bearing cap
M8 ..................................................................................................................................................................................................................... 30 Nm
Caution: To avoid damage to the rocker shafts, slacken each rocker shaft/camshaft bearing cap bolt one turn at a time in sequence.
Remove exhaust rocker shaft (1) and intake rocker shaft (2).
Unclip intake valve rocker arm spacer.
Remove rocker arms from shaft.
Note: Lubricate the roller portion of the rocker arms and shaft with clean engine oil.
Hydraulic lifters are replaced as an assembly with the rocker arms.
When tightening the rocker shaft/camshaft cap bolts, ensure the camshaft bearing caps are fully seated and the roller rocker arms remain in their
proper position.
Caution: the inlet and exhaust rocker shafts are not interchangeable.