Adjusting exhaust valve clearance

1. Install tool no. 1.820.232.000 on the timing pulley screwing the three screws to the support hub.
2. Tighten the nut of tool no. 1.820.232.000 and locking the pulley with tools no. 1.822.151.000 and no. 1.822.146.000, move the pulley and hub forwards until they are released from the camshaft.

• Slacken the fastening nuts and remove the camshaft caps.

1. Remove the camshaft raising it from the rear.
2. Remove a cup and the corresponding valve clearance adjustment cap.

1. Measure the thickness of the caps with the specific dial gauge no. 1.824.034.000 then, according to the difference with respect to the values measured previously, choose from set no. 1.820.150.000 (R.9.0001) the suitable ones to restore the correct clearance of each valve.

• Fit the new cap and the valve cup after lubricating with engine oil.
• Proceed in the same way for the remaining pairs of cups and caps.

1. Remove the centre part of tool no 1.820.232.000.
2. Assemble the camshaft checking through the hole of the tool that the key is positioned correctly.
3. Push the timing gear driving pulley into the initial assembly position, then remove tool no. 1.820.232.000.
4. Tighten to the specified torque the three pulley fastening screws and the hub fastening screw leveraging with tools no. 1.822.151.000 and no. 1.822.146.000.
5. Fit the camshaft caps and tighten the fastening nuts to the specified torque.

13 ÷ 16 Nm
1.3 ÷ 1.6 kgm

16 ÷ 18 Nm
1.6 ÷ 1.8 kgm

Adjusting exhaust valve clearance

1. Using tool no. 1.822.016.000 (A.5.0220) slacken the locknut of the adjustment screw working on the intermediate lever of the tool.
2. Still using the same tool, act on the adjustment screw until the specified valve clearance is obtained.
3. Tighten the locknut and check the valve clearance again.

15 ÷ 18 Nm
1.5 ÷ 1.8 kgm