2. First, adjust the clearances in the intake 1 and 2 and exhaust 1 and 3 valves (Figure 2.17a, b).
Figure 2.17a. Adjusting the clearance in the intake 1 and 2 and exhaust 1 and 3 valves of 12-valve engines: 1 - Exhaust valve 1; 2 - Exhaust valve 3; 3 - Inlet valve 1; 4 - Inlet valve 2 | 
Figure 2.17b. Adjusting the clearance in the intake 1 and 2 and exhaust 1 and 3 valves of 8-valve engines: 1 - Exhaust valve 1; 2 - Exhaust valve 3; 3 - Inlet valve 1; 4 - Inlet valve 2. |
3. Loosen the adjusting bolt lock nut. Using a measuring pin, adjust the valve clearance correctly by turning the adjusting bolt (Figure 2.18).
Figure 2.18. Loosen the adjusting bolt lock nut. Using a measuring pin, adjust the valve clearance correctly by turning the adjusting bolt
Normal value for a cold engine: inlet valve - 0.09 mm, outlet valve - 0.17 mm.
4. After securing the adjusting bolt with a screwdriver, tighten the lock nut.
5. Rotate the crankshaft 360 degrees clockwise.
6. Then adjust the clearances in the valves indicated in Figure 2.19a,b.
Figure 2.19a. Adjusting the clearance in the intake 3rd and 4th and exhaust 2nd and 4th valves of 12-valve engines: 1 - Exhaust valve 2; 2 - Exhaust valve 4; 3 - Inlet valve 3; 4 - Inlet valve 4. | 
Figure 2.19b. Adjusting the clearance in the intake 3rd and 4th and exhaust 2nd and 4th valves of 8-valve engines: 1 - Exhaust valve 2; 2 - Exhaust valve 4; 3 - Inlet valve 3; 4 - Inlet valve 4 |