Camshaft Gear/Sprocket: Service and Repair

VTC Actuator, Exhaust Camshaft Sprocket Replacement

Removal

1. Remove the cam chain. Cam Chain Removal
NOTE: For exhaust camshaft sprocket removal, do step 3 and 4.

2. If the VTC actuator will be reused, do these steps to avoid damaging the actuator lock pin.
-1 Remove the intake camshaft from the cylinder head, and seal the retard holes in the No 1 camshaft journal with tape and wire tie. VTC Actuator Inspection
Seal over one of the advance holes with tape. VTC Actuator Inspection
-3 Apply air to the unsealed advance hole to release the lock. VTC Actuator Inspection
Remove the wire tie, the tape, and the adhesive residue from the No. 1 camshaft journal.
-5 Temporarily reinstall the camshaft and the cam journals on the cylinder head.

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

4. Remove the VTC actuator and/or the exhaust camshaft sprocket from the camshaft.






Installation

1. Install the VTC actuator, and/or the exhaust camshaft sprocket onto the camshaft.
NOTE: To avoid damage to the VTC actuator, it must be installed in the unlocked position. If necessary, temporarily install the VTC actuator mount bolt head-tight, and unlock the actuator.

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

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





4. Hold the camshaft with 27 mm open-end wrench, and turn the VTC actuator by hand clockwise until you hear and feel the actuator lock pin click into place.

5. Install the cam chain. Cam Chain Installation