Exhaust side tappets

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

1. Measure cap thickness with gauge no. 1.824.034.000. Then choose from the no. 1.820.150.000 (R.9.0001) set the suitable tool to restore correct tappet clearance according to the measured values.

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

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 prescriptions.

"Gs" exhaust tappet clearance
0.225 ÷ 0.250 mm

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

1. With tool no. 1.822.016.000 (A.5.0220) intermediate lever, loosen the adjustment screw lock nut.
2. Turn the adjustment screw until the prescribed exhaust tappet clearance is reached with the same tool.

• Torque the lock nut and check tappet clearance.

15 ÷ 18 Nm
1.5 ÷ 1.8 kgm

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 prescribed torque.

NOTE: Use goniometer no. 1.860.942.000 for angle torque.

NOTE: The safety notches on the crankcase and on the main bearings should be on the same side.

25 Nm + 79°
2.5 kgm + 79°