Examination
1. Remove the cylinder head cover and radiator fan shroud.
2. Set the piston of the first cylinder to TDC and check that all the alignment marks are aligned with the pointers.
3. Check that when turning the camshaft sprocket that controls the intake valves clockwise until it stops, the regulator mechanism is in position "complete reduction".
4. Otherwise, adjust the initial position of the camshaft.
Adjustment
1. Rotate the crankshaft until the 30°BTDC mark is aligned with the crankshaft angle sensor bracket.
2. Remove the drive chain tensioner.
3. Remove the top drive chain cover.
4. Remove the camshaft sprocket that controls the exhaust valves.
5. Using a flat wrench, turn the camshaft to such a position that the lower edge of the mounting hole in the camshaft flange is aligned with the upper plane of the cylinder head. To check the installation, insert a steel rod with a diameter of 4 mm into the installation hole.
6. Turn the crankshaft clockwise until the TDM mark on the crankshaft pulley aligns with the crank angle sensor bracket.
7. Turn the intake camshaft adjuster by hand clockwise until it stops.
8. Fit the drive chain to the intake camshaft sprocket and check that the chain is properly located on the lower chain guide.
9. Without turning the camshaft, install the camshaft sprocket that controls the exhaust valves.
10. Install the upper drive chain cover.
11. Install the drive chain tensioner.
12. Recheck the original position of the camshafts.