Scania 16 litre engine. Work Description — part 21
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Crankshaft
Removing
The crankshaft must be removed while the
engine is suspended in the universal stand. Refer
to Mounting the engine in a universal stand.
1
Remove the oil sump.
2
Remove the flywheel as described in
Flywheel, removing.
3
Remove the flywheel housing as described
in Flywheel housing, removing.
4
Remove the oil strainer and the suction line.
5
Remove the poly-V-belts.
6
Remove the fan ring and the fan.
7
Remove the cylinder heads as described in
Cylinder head, removing.
8
Remove the belt pulleys on the front of the
crankshaft.
9
Remove the front housing.
10 Remove the crankshaft damper with spacer
sleeve.
11 Remove the piston cooling nozzles.
IMPORTANT! The piston cooling nozzle must
not be damaged. The oil jet must hit the piston
precisely. If it does not, the piston will become
too warm and result in engine breakdown.
Damaged nozzles must not be re-aligned, renew
them instead.
Crankshaft
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0110w14b.mkr
12 Turn the engine so that it is vertical.
13 Lift out the pistons and connecting rods.
Turn the crankshaft so that the piston to be
removed is at TDC. To be able to rotate the
crankshaft, the crankshaft gear must be
secured with two flywheel bolts and two
50 mm spacers.
1
50 mm long spacers
2
Flywheel bolts
1
2
113 059
Engine, after removing points 1-13
112
36
2
Crankshaft
112 363
14 Turn the engine upside down.
15 Remove the crankshaft gear.
16 Remove the main bearing caps. Protect the
oilway in the crankshaft e.g. by winding
tape around it with the adhesive side out.
Note: The main bearing caps are marked and
must be refitted in the same place.
17 Remove the lower and upper thrust washers.
18 Lift out the crankshaft.
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83
Fitting
Tightening torques
All parts must be cleaned before fitting.
1
Place the bearing shells in the main bearing
seats in the engine block and then lubricate
the bearing surface with engine oil.
Note: The outside of the bearing shells must not
be lubricated.
2
Lift in the crankshaft.
3
Fit the thrust bearing washers.
4
Place the main bearings in the main bearing
caps and fit them. Torque tighten the cap
bolts to 90 Nm +90°.
Note: The main bearing caps are marked and
must be refitted according to the marks on the
block.
5
Torque tighten the side bolts to 180 Nm.
Main bearing cap bolts
90 Nm+90
°
Side bolts
180 Nm
Connecting rod cap bolts
50 Nm+90
°
Bolts to crankshaft damper
135 Nm
Bolts to inner belt pulley on crankshaft
92 Nm
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5
5
90 Nm + 90
180 Nm
Crankshaft
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6
Fit the crankshaft gear so that the marks on
the crankshaft gear and the intermediate
gear are pointing at each other. Secure the
gear with two flywheel bolts and two
50 mm long spacers.
1
50 mm long spacers
2
Flywheel bolts
1
2
113 059
7
Turn the engine so that it is vertical.
8
Fit the piston and connecting rod as
described in Fitting the piston and
connecting rod.
9
Fit the connecting rod bearing into the
connecting rod cap and lubricate the bearing
surface. Fit the cap. Lubricate the bolts and
torque tighten them to 50 Nm +90°.
10 Clean the cylinder heads and fit them as
described in Cylinder head, fitting.
11 Fit the crankshaft damper and spacer sleeve.
Torque tighten the bolts to 135 Nm.
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50 Nm + 90
o
Crankshaft
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