BMW D 12 Marine engine REMOVING AND ARMS
INSTALLING THE
ROCKER
Removing the rocker arms —
Remove the valve cover
Fig. 39 Screw out the water temperature pick-up (39/1), bend up the tab washers (39/2) and screw the two hex.head screws (39/3) out of the rocker arm shaft.
39 Fig. 40 Use a drift to knock the rocker arm shaft (40/i) out of the cylinder head and take the rocker arms out of the cylinder head. Pay attention to any shims.
40 Installing the rocker arms Installation takes place in the reverse sequence to removal. Note: Fig. 41 Place a new 0-ring (41/1) on the rocker arm shaft (41/2), oil the shaft, insert the end of the shaft without 0-ring into the hole in the cylinder head and fit the rocker arms on to the shaft as it is being pushed through. Oil and fit the second 0-ring. Measure the axial clearance (0,05 mm) of the rocker arms with a feeler gauge and correct with shims (41/3), if necessary. — —
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Set the valves Set the decompression device 41
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