Crank System
| Number | Designation | Number | Designation |
| 1 | Vibration damper | 4 | Gear wheel |
| 2 | Crankshaft | 5 | Oil cooler pipe |
| 3 | Carrier plate |
The crankshaft is made from forged steel with induction hardened bearing surfaces.
The sprocket is crimped on the crankshaft's rearmost shank.
The crankshaft is supported by seven main bearings. The main bearings are replaceable main bearing shells. The sixth main bearing is a thrust bearing that holds the crankshaft in a determined position along the length of the axle.
An internal vibration damper is on the front end of the crankshaft. Inside the enclosed vibration damper, a circular flywheel works on a silicone fluid, which dampens the crankshaft torsion oscillations. The vibration damper gives longer service life for the crankshaft and smoother engine operation.
Engine versions without turbo were changed 10w20 with a modified crankshaft. The goal is to reduce the crankshaft's torsion vibrations at high engine speeds (4, 500 rpm and up) and to save weight. The reduced torsion vibration means reduced noise level at high RPMs at the same time as it reduces the load (torque) on the geartrain that drives the camshafts and auxiliary unit drive. It is the crankshaft's forged blank that is changed, reworking is unchanged.
To reduce vibrations material has been added between crank pin and main pin for the rear cylinders, which gives increased stiffness. At the crankshaft's front end, material has been removed instead, to reduce the crankshaft's oscillating mass. A new strategy has been used to design the crankshaft's balance weights to reduce weight. This can be seen by some balance weights having become small while others have become bigger. The changes have reduced the crankshaft's weight by a total of 1 kg. The change does not apply to turbo engines, but can be used on earlier versions of aspiration engines.
Main bearing
To improve the cold-cranking capacity, all main bearings have a changed appearance. In the middle of the bearing the thickness is unchanged but toward the end of the bearing the thickness is approx. 10μm thinner. The new type of bearing is possible to use on all versions of engine B63x4x, also those built earlier than 10w20.