Design

Crankshaft
The crankshaft has six main bearings. The 5th main bearing is a throw-out bearing. At the front end of the crankshaft are two spline joints, the inner of which drives the oil pump. The drive gear for the timing belt and vibration damper is on the outer joint.

A blind spline ensures that the position and control of the drive gear is correct. The connecting rods are forged. The cover is held in the correct position by the saw-toothed joint between the connecting rod and cover. B5244SX and B5254TX have forged crankshafts ensuring both maximum strength and low noise levels