49
Crankshaft assembly
Remove the screws for the central main bearing
and remove the bearing cap assembly with the
three lower thrust washer halves (B). Press down
one end of each and every one of the upper thrust
washers with a suitable tool, made of soft material
so that the relevant thrust washer slides out of its
groove (C). If necessary move the crankshaft for-
wards or backwards to take the load off a thrust
washer which is trapped.
4
Lubricate the thrust washers with fresh engine oil.
5
Insert the upper thrust washer halves in their
grooves in the cylinder block. Check that the side of
thrust washer with the lubrication groove is turned
towards the crankshaft.
6
Install the lower thrust washer halves in the main
bearings with the lugs in their respective cut outs.
Check that the lubrication grooves in the thrust
washers are turned away from the bearing cap (B).
7
Check that the guide sleeves are correctly installed
in the bearing cap or in the cylinder block.
8
Check that the bearing shell is correctly installed in
the cap and that the main bearing journals are
clean. Lubricate the bearing shell with fresh engine
oil.
9
Install the bearing cap with the lugs for both bearing
shells turned in the same direction (14A.07/B1 and
B2). Tighten the screws for the main bearings in
stages and evenly to 112 Nm.
10
Check the axial clearance of the crankshaft. For the
correct axial clearance, see Workshop Manual,
“Technical data”
11
Install the oil screen and extractor pipe if required,
operation 18A-04.
12
Install the oil pan, operation 18A-03 and fill it to the
correct level with approved engine oil.
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