MWM Acteon Workshop Manual page 146

Balancer Unit
After installed, measure the axial clearance in the
balancer unit shafts, observing that the clearance must
be between 0.10 and 0.30 mm.
Measure the backlash between the balancer gear and
crankshaft gear ring.
Determine the necessary amount of shims between
the balancer and the bearing caps so that that
clearance is between 0.05 and 0.18 mm.
The shims are available with 0.1 mm of thickness.
Use the same amount of shims on the two bearings
to keep the alignment of the balancer.
Remove the balancer and, with the bearing thrust rings
already determined, install the necessary shims on
the bearing caps guide-pins.
Reinstall the balancer with the timing of the marks
"00" and "0". Tighten the balancer bolts with 60 ± 5
Nm.
Repeat the measurements of the axial clearance of
the balancer shaft and backlash to confirm if they are
according to the specification.
9.612.0.006.7160 - 05/04