22
Checking the thermostat
49. Lower the thermostat into hot water and with a
thermometer test to see whether the thermostat
opens and closes at the right temperature. It
should start opening at 60
0
C (140
0
F) and be fully
open at 74CC (165
0
F). If the thermostat is faulty,
it must be replaced. Clean and fit a new rubber
gasket 1 on the thermostat. Place a new 0-ring 2
for the water hole on the lower edge of the
thermostat housing and fit the housing on the
exhaust manifold.
INSTALLING THE ENGINE
50. Before installing, heat the crankshaft drive gear.
Place the key in the key slot on the crankshaft
and press on the new drive gear.
Fit new bearing shells. Oil the bearings. Install
the crankshaft. Fit an axial bearing half 1 on
each side of the intermediate main bearing with
the oil grooves 2 facing outwards.
51. Oil and fit the bearing halves in the caps. Place
the caps according to the marking on the block.
Fit the remaining axial bearing halves on the
intermediate cap with the oil grooves facing
outwards. NOTE! Fit a new 0-ring on the rear
cap which is integrally built with the lubricating oil
pump. The tightening torque for the main
bearings is 50 Nm (5 kpm = 36 Ibftf). Turn the
engine.
52. Turn the piston rings so that their respective
gaps are apart from each other. The piston top is
marked with “Front” and should point towards the
flywheel. NOTE! Fit the connecting rod which is
marked with punch pops nearest the flywheel.
Carefully tap the piston downwards through the
installation tool with a wooden handle or similar.
Place the engine on its side and tighten up the
caps. Tightening torque = 50 Nm (5 kpm = 36
Ibftf). Lock the bolts with the lock washers.
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