Service procedures - engine Group 21
68
Crankshaft, replacing
(Engine removed)
Special tools: 999 3590
1
Remove the pan. Remove the oil pump, the oil strainer and
the oil delivery pipe.
2
Remove the timing gear cover.
3
Remove the oscillation damper and the polygon hub.
4
Remove the flywheel and the flywheel casing.
5
Remove all bolts and spacers which hold the main bear-
ing cap reinforcing plates.
6
Remove the main bearing bolts and the big-end bearing
bolts.
7
Remove all reinforcing plates, main bearings and big-end
bearing caps.
8
Lift out the crankshaft.
9
Check the oil channels of the new crankshaft and its contact
surfaces with the bearing shells, cylinder block and caps.
10
Examine the bearing shells. Worn or damaged shells must
be replaced.
11
Put the bearing shells in their respective positions in the en-
gine block and caps. Make sure that the bearing shells are
correctly fitted and that the caps are undamaged.
12
Smear the bearing pins with engine oil and carefully lift the
crankshaft into position.
13
Fit the thrust washers for the center main bearing (axial
bearing). Due to the fixing recesses, the thrust washers can
only be mounted in one position.
14
Fit the main bearing caps. All of the caps incorporate a re-
cess which must be turned to fit over the guide studs.
Note: Do not yet fit the bolts.
15
Observe the number of the main bearing caps which must
be fitted in that order.
16
Fit the reinforcing plates.
17
Fit the bolts and the spacer sleeves and tighten the reinforc-
ing plates to the engine block. Torque to 85 Nm (62.7 ft-lb).
18
Oil and fit the main bearing bolts. Torque 440 Nm (324.5 ft-
lb).
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