During adjustment, make sure that the valve lever is not tilted, as this may lead to an overestimation of the actual clearance.
Adjust in the following order:
- turn the crankshaft clockwise until the mark on the camshaft sprocket matches the mark on the bearing housing, which will correspond to the end of the compression stroke in the fourth cylinder. In this position, the clearance at the exhaust valve of the 4th cylinder is adjusted (8th cam) and inlet valve of the 3rd cylinder (6th cam);
- loosen the lever adjusting bolt nut;
- insert a flat feeler gauge A.95111 0.15 mm thick for the intake valve between the lever and the camshaft cam (0.2mm for exhaust valve) and with a wrench, tighten or unscrew the bolt by subsequent tightening of the lock nut until the feeler gauge enters with a slight pinch when the lock nut is tightened (pic. 2-42);
- After adjusting the gap at the exhaust valve of the 4th cylinder and the intake valve of the 3rd cylinder, rotate the crankshaft 180°in sequence and adjust the gaps in the order indicated in Table 2-2.
Table 2-2. Valve clearance adjustment sequence
| Angle of rotation of the crankshaft, hail | Number of cylinder in which the compression stroke occurs (end) | No. of adjustable valves (cams) |
| 0 | 4 | 8 and 6 |
| 180 | 2 | 4 and 7 |
| 360 | 1 | 1 and 3 |
| 540 | 3 | 5 and 2 |