Cylinder Block Components (page 4 of 10)

ENGINE - V8

DESCRIPTION AND OPERATION

12-2-5

Crankshaft

The crankshaft is manufactured from forged steel with five main bearings and the thrust bearing on number five 
bearing. Six counterweights fitted. These are positioned in harmony with the ignition firing order to ensure smooth 
running.

The crank pins are offset by 90

°

 and hollow bored to reduce weight.

There are four sizes of crankshaft available, standard and three undersizes.

Colour coding identifies the size of the journal.

The main bearing caps have a unique four bolt fixing for additional strength, and threaded protective bushes which 
are torqued before the collar screws are installed.

NOTE: For information on colour coding and journal sizes, refer to the General Data section of the workshop manual.

At the front of the crankshaft, incorporated in the auxiliary belt pulley is a torsional vibration damper. Fitted behind the 
damper, to the crankshaft, is the drive sprocket for the camshaft and oil pump.

Torsional Vibration Damper
The torsional vibration damper with decoupled belt pulley suppresses longitudinal vibration and reduces noise. It is 
mounted at front of the crankshaft with 4 bolts torque loaded to 45 Nm.