2. For simplification of check turn out all spark plugs.
3. Remove the cylinder head cover.
4. Turn the crankshaft clockwise until the mark on the pulley aligns with the mark «T» scales on the bottom cover of the timing belt.
5. Rock the rocker arms of cylinders #1 and #4 by hand to determine which cylinder the piston is at TDC on the compression stroke. If there are gaps between the rocker arms and the intake and exhaust valves of one of the cylinders, the piston of this cylinder is at TDC on the compression stroke.
6. Perform check and adjustment of backlashes in a drive of valves shown on fig. 3.8 with a white arrow when the piston of the 1st cylinder is at TDC on the compression stroke. If the piston of the 4th cylinder is at TDC in the compression stroke, the adjustment is carried out on the rocker arms shown in Fig. 3.8 black arrow.
Pic. 3.8. When installing the piston of the 1st cylinder at TDC, measure the clearance of the valves marked with white arrows, and when installing the piston of the 4th cylinder at TDC, measure the clearance of the valves marked with black arrows
7. Use a metal probe to measure the valve clearance.
If the clearance is not as specified, loosen the rocker arm adjusting bolt jam nut and adjust the clearance by turning the adjusting bolt and measuring the clearance with a metal feeler gauge.
Rated clearance (on a hot engine):
- inlet valves: 0.20 mm
- exhaust valves: 0.30 mm
8. Using a screwdriver, while holding the adjusting bolt from turning, tighten the locknut to the required torque.
Tightening torque: 9 Nm
9. Rotate the crankshaft 360°until the mark on the pulley matches the mark «T» on the scale of the lower timing belt cover.
10. Repeat the steps in steps 7 and 8 and check and adjust the clearances in the drive of the remaining valves.
11. Install the cylinder head cover.
12. Screw spark plugs and tighten the required moment.
Tightening torque: 25 Nm