Crankshaft refitting

Crankshaft refitting

• Fit the crankshaft with half-bearings and thrust rings on the crankcase.

NOTE: Refit the thrust half-rings with the grooved surface facing the crankshaft.

• Fit the main bearings and half-bearings on the journals according to the numbers. Fasten to the pre-scoped torque.

NOTE: Use goniometer no. 1,860,942,000 for angle torque.

NOTE: The safety notches should be on the same side.

25 Nm + 79°
2.5 kgm + 79°

Exhaust side tappets

• Temporarily fit the hub and the camshaft drive pulley.

1. Turn the camshaft with tools no. 1,822,146,000 and no. 1,822,151,000. Then measure the clearance between lowered cam radius and corresponding cup. Check whether the value falls within prescribed tolerances.

• Refit the caps, the camshaft and the respective caps. Fasten the caps at the prescribed torque and check the intake tappet clearance.

1. Measure cap thickness with gauge no. 1,824,034,000. Then choose from the no. (R.9,0001) 1,820,150,000 to restore correct tappet clearance according to the measured values.

“Gs” exhaust tappet clearance

0.225 ÷ 0.250 mm

Exhaust side tappets

1. Remove the cups and remove the tappet clearance adjustment caps.

• Torque the lock nut and check tappet clearance.

1. With tool no. 1,822,016,000 (A.5,0220) intermediate dial lever, loosen the adjustment screw lock nut.
2. Turn the adjustment screw until the prescribed exhaust tappet clearance is reached with the same tool.

• If the exhaust tappet clearance is not included within the prescribed values, adjust as follows:

1.5 ÷ 1.8 kgm
15 ÷ 18 Nm