Camshaft Gear/Sprocket: Service and Repair

VTC Actuator, Exhaust Camshaft Sprocket Removal and Installation

Removal

1. Remove the cam chain. Cam Chain Removal

2. Hold the camshaft with an open-end wrench, then loosen the variable valve timing control (VTC) actuator mounting bolt and exhaust camshaft sprocket mounting bolt.

3. If the VTC actuator will be reused, do these steps.
-1 Remove the intake camshaft, and seal the advance holes and retard holes in the No 1 camshaft journal with tape.. VTC Actuator Inspection
-2 Punch a hole in the tape over one of the advance holes. VTC Actuator Inspection
-3 Apply air to the advance hole to release the lock. VTC Actuator Inspection
-4 Remove the tape from the No. 1 camshaft journal.

4. Remove the VTC actuator and exhaust camshaft sprocket.






Installation

1. Install the VTC actuator and exhaust camshaft sprocket.
NOTE: Install the VTC actuator while in the unlocked position.

2. Apply new engine oil to the threads of the VTC actuator mounting bolt and exhaust camshaft sprocket mounting bolt, then install them.

3. Hold the camshaft with an open-end wrench, then tighten the mounting bolts.

Specified Torque
VTC Actuator Mounting Bolt:
113 N-m (11.5 kgf-m, 85 lbf-ft)
Exhaust Camshaft Sprocket Mounting Bolt:
72 N-m (7.3 kgf-m, 53 lbf-ft)

4. Hold the camshaft with an open-end wrench, and turn the VTC actuator clockwise until you hear it click. Make sure to lock the VTC actuator by turning it.

5. Install the cam chain. Cam Chain Installation