MWM Acteon Workshop Manual page 114

Gearing Carcass
Disassembly Notes
Before disassembling the pulley, lock the flywheel with
the special tool MWM nr. 9.610.0.690.026.4.
The engine can be also locked with a lever positioned
on the nut of the water pump gear, until that the lever
touches the pulley. This way, the crankshaft will stay
locked making possible the loosening of the crankshaft
pulley bolts.
Loosen the bolts of the crankshaft pulley.
Remove the pulley and damper set.
9.612.0.006.7160 - 05/04