Crankshaft/Mount

Crankshaft/Mount

The drop-forged crankshaft runs in five bearings and has eight counterweights. Main bearing 3 is designed as a thrust bearing. Axial play is determined by two thrust washers, which are inserted into the bearing halves. The main bearings are two-component bearings and have a diameter of -> length: 64 mm.







Since the lower part of the crankcase is made of an all-aluminium alloy, the main bearings are stronger than those used previously and the retaining lugs have been changed to avoid confusion. The main bearings are also "lead free".

Torsional vibration balancer

A torsional vibration balancer is used to reduce torsional vibrations on the crankshaft and to minimize component stress, e.g. on the belt drive.







A shock absorber with the very best damping characteristics was selected because of the greater power impulses associated with direct fuel injection engines.

The viscous shock absorber has a floating flywheel in silicon oil in the housing. This allows the counter-movement of the bearing mass to a not quite evenly rotating crankshaft. This system also features an optimised fixing bore compared to the previous engine.