VTC Actuator Inspection

VTC Actuator Inspection

1. Remove the cam chain. Cam Chain Removal

2. Loosen the rocker arm adjusting screws. Rocker Arm Assembly Removal

3. Remove the camshaft holder. Rocker Arm Assembly Removal

4. Remove the intake camshaft.

5. Check that the variable valve timing control (VTC) actuator is locked by turning the VTC actuator counterclockwise. If not locked, turn the VTC actuator clockwise until it stops, then recheck it. If it is still not locked, replace the VTC actuator.

6. Seal the advance holes (A) and retard holes (B) in the No. 1 camshaft journal with tape.

7. Punch a hole in the tape over one of the advance holes.






8. Apply air to the advance hole to release the lock.






9. Check that the VTC actuator moves smoothly. If the VTC actuator does not move smoothly, replace the VTC actuator.

10. Remove the tape and adhesive residue from the camshaft journal.

11. Make sure the punch marks on the VTC actuator and exhaust camshaft sprocket are facing up, then set the camshafts in the head. Rocker Arm Assembly Installation

12. Set the camshaft holders and chain guide B in place. Rocker Arm Assembly Installation

13. Tighten the camshaft holder bolts to the specified torque. Rocker Arm Assembly Installation

14. Hold the camshaft and turn the VTC actuator clockwise until you hear it click. Make sure to lock the VTC actuator by turning it.

15. Install the cam chain. Cam Chain Installation

16. Adjust the valve clearance. Adjustments