19. Bearing replacement. Press out the camshaft bearings if
they are damaged or if the wear is too great (see technical
data). Clean the bearing housings and ensure that the oil
channels are clean. Press in the new bearings so that the oil
holes face the corresponding oil channels in the block. When
the bearings are pressed in position they are to be reamed
(see technical data).
17. Remove the main bearing caps. Take care of the axial
thrust bearings 1 on the transmission side. Lift the crankshaft
out and the bearing shells afterwards and then the axial
bearing halves.
18. Mark the cylinder liner’s position in the cylinder so that
the same position can be obtained during assembly.
Remove the cylinder liner. Use tool 884551. Use the long
screw and its nut from the tool 884231 (MD21-MD32). See
page 29 Special tools. Discard the 0-ring. Afterwards remove
the 0-rings in the block which provide a seal for the cylinder
liner and then remove the valve lifters. Wash all the parts
and replace those damaged.
Oilpump
20. Remove the gearwheel’s nuts and pull off the gearwheel
with a puller. The gearwheel sits on a key, take care of this
key.
7
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