71
Repair instructions
Camshaft installation
1
Oil the camshaft bearing surfaces and cam profiles.
Carefully slide the camshaft into place, so as to avoid
damaging the bearings. Use tool no. 9998079.
2
Install the camshaft flange. Torque the screws to
65 Nm (6.5 kpm).
3
Install the timing gears in accordance with items 1–5
in the “Timing gear, assembly” method on page 65.
Install the timing cover and polygon hub in accor-
dance with the “Application of sealant, timing gear
cover” and “Polygon hub, installation” methods on
pages 66 and 67.
4
Oil the valve lifters and guides in the engine block
with engine oil and put the valve lifters back to their
original locations in the block.
NOTE! If the camshaft is new, new valve lifters must
also be installed. Coat the surface of the valve lifters
in contact with the cam profiles with molybdenum dis-
ulphide compound.
5
Put the push rods back in their original positions and
install the rocker mechanism.
Tightening torque: for the 61 series with steel bearing
caps*, the torque is 65 Nm (6.5 kpm).
Late model versions of the 61 series and all engines
in the 62 and 63 series have aluminium bearing caps.
These should be torqued to 50 Nm (5.0 kpm).
The 71 and 72 series should be torqued to 65 Nm (6.5
kpm).
* The steel bearing cap has been replaced by an aluminium bear-
ing cap as a spare part.
6
Install the valve lifter inspection hatches with new
gaskets.
Tightening torque is 24 Nm (2.4 kpm).
NOTE! Put the oil guide plate on the rear hatch.
7
Install the crankcase breather pipe.
8
Adjust the valve clearance in accordance with the in-
struction on page 52.
9
Install the valve covers.
Crankshaft removal
(Engine lifted out)
1
Drain or pump out the engine oil.
2
Remove the sump. Remove the oil pump suction and
supply pipes plus the baffle.
3
Remove the crankshaft pulley, torsional damper,
polygon hub and timing gear cover.
Please refer to “Timing gear removal” on page 60.
4
Remove the reverse gear, the flywheel and the fly-
wheel housing.
5
Remove the main bearing and big end bearing caps.
(The oil pump is removed together with the front main
bearing cap).
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