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.