Technical data

C
amshaft Crankshaft
Install Camshaft, Valve lifter shaft, valve lifters Crankshaft, ball sleeve
20
Reassembly of the engine parts is carried out in the reverse order.
NOTE
The tooth gear on the camshaft is marked with the
letter “L”. This indicates the direction of rotation of
the engine as viewed from the front.
Installing the crankshaft
- Attach the counterweights, tightening the bolts
to a torque of 2.2 kg/m (16 lb/ft)
- Heat the inner race of the roller bearing to
between 70 and 80
o
C and mount on the
crankshaft.
- Place the retainer ring on the outer bearing
race.
- Push inner straight roller bearing onto the
crankshaft together with spacer washer and
drive dog hub.
- Heat the crankcase to between 100 and 150
o
C
on a heating plate.
- Push the outer race of the bearing on the
flywheel side onto the crankshaft and screw it
on using special tool No 74 64 1 333 513
- Drive in the rear camshaft bearing using the
assembly punch No 74 64 1 333 516.
- Install the camshaft.
- Screw in the set screw and replace the plastic
plug.
- Insert the valve lifter shaft and tighten, so that
the valve lifters show a minimum of axial play
but are still free to move on the valve lifter shaft.
NOTE
Take care that the thrust washer is
placed between the valve lifters and the
crankcase to prevent the valve lifters
from wearing into the aluminium case.
CAUTION
The crankshaft bearing is asymmetrical.
The correct position is that shown in the
illustration (41). The large rounding must
be placed towards the outside, to ensure
sufficient lubrication.
- Push the crankshaft with bearing into the
heated crankcase from the flywheel side, until it
reaches the stop of the special tool.
CAUTION
When installing the crankshaft, make
sure that the axial play between the
crankshaft and crankcase is between
about 0.2 and 0.4 mm.
- Replace all plastic parts such as oil filter cover
and cold start cover
- Turn the engine back onto flywheel side and
place ball sleeve with sliding disc into position.
Take care that the balls are inserted correctly.