Variable Valve Timing Actuator: Service and Repair

Exhaust Camshaft Position Actuator Replacement

Tools Required
- J 36660-A Torque Angle Meter
- J 44217 Timing Chain Retention Tool







Removal Procedure
1. Remove the camshaft cover.
2. Rotate the engine until the word Delphi on the exhaust camshaft position actuator is lined up parallel with the cylinder head to cam cover mating surface.
3. Remove the top chain guide bolts.
4. Remove the top chain guide.
5. Using the timing mark on the exhaust camshaft position actuator sprocket as a reference, make a mark on the timing chain link across from it.








6. Install the J-44217.
6.1. Install the hook portion of the timing chain retention tools into one of the timing chain links near the timing chain shoe on both sides of the engine.
6.2. Tighten the wing nuts.
6.3. Ensure the hooks are still in one of the links and the gauge blocks of the tool are firmly in place on the edge of the head.








7. Remove the exhaust camshaft position actuator bolt.
8. Remove the exhaust camshaft position actuator.







Installation Procedure
1. Install the exhaust camshaft actuator into the timing chain.
2. Align the marked link of the timing chain with the timing mark on the exhaust camshaft position actuator sprocket (1).

Important: Ensure the alignment pin is engaged between the camshaft the exhaust camshaft position actuator.

3. Install the exhaust camshaft actuator onto the exhaust camshaft.

Important: Rotate the camshaft actuator clockwise relative to the camshaft prior to tightening the bolt







4. Rotate the camshaft actuator clockwise until it stops (as seen from the front of the vehicle).

Notice: The camshaft must be fully advanced during installation. Engine damage may occur if the camshaft actuator is not fully advanced.

5. Install the exhaust camshaft actuator bolt.
Tighten the exhaust camshaft actuator bolt the first pass to 25 Nm (18 ft. lbs.).

Use the J 36660-A to tighten the exhaust camshaft actuator bolt the final pass an additional 135 degrees.







6. Remove the J-44217.
7. Install the top chain guide.
8. Add threadlock GM P/N 12345493 (Canadian P/N 10953488) to the top chain guide bolt threads.
9. Install the top chain guide bolts.
Tighten the top chain guide bolts to 10 Nm (89 inch lbs.).

10. Install the camshaft cover.