Variable Valve Timing Actuator: Service and Repair

Camshaft Position Actuator Replacement - Exhaust

Tools Required
^ EN-44217-45 Chain Holding Tool
^ J44217 Timing Chain Retention Tool
^ J44221 Camshaft Holding Tool
^ J45059 Angle Meter

Removal Procedure
1. Remove the camshaft cover.
2. Ensure the exhaust camshaft position (CMP) actuator is functioning properly. Refer to Camshaft Position (CMP) Actuator Diagnosis.
3. Remove the exhaust CMP sensor.
4. Remove the intake CMP sensor.





5. Rotate the crankshaft in the engine rotational direction clockwise, until the #1 piston is at top dead center (TDC) on the compression stroke. The word Delphi on the exhaust camshaft position actuator will be parallel with the cylinder head to cam cover mating surface.
6. Using the timing mark on the exhaust camshaft position actuator sprocket as a reference, make a mark on the timing chain link adjacent to it.





Caution: Refer to Camshaft Holding Tool Caution in Service Precautions.

7. Install the J44221 to the rear of the camshafts.





8. Complete the following in order to install the J44217 (1) and the EN-44217-45 (1).
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.
2. Tighten the wingnuts.
3. Ensure the hooks are still in one of the links and the gage blocks of the tool are firmly in place on the edge of the head.





9. Remove and discard the exhaust camshaft position actuator bolt.
10. Remove the exhaust camshaft position actuator.
11. Clean and inspect the sprocket. Refer to Timing Chain and Sprockets Cleaning and Inspection.

Installation Procedure
1. Ensure the camshaft actuator is fully advanced prior to installation.





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

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

Important:
^ To aid in aligning the actuator to the camshaft, use a 25 mm (1 inch) wrench on the hex of the camshaft to rotate
^ Ensure the alignment pin is properly engaged with the camshaft

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





Notice: Refer to Fastener Notice in Service Precautions.

4. Install a NEW exhaust camshaft actuator bolt.
Tighten the bolt a first pass to 25 Nm (18 ft. lbs.). Using the J45059 rotate the bolt a final pass an additional 135 degrees.





5. Remove the J44217 (1) and the EN-44217-45 (1).





6. Remove the J44221 from the camshafts.
7. Install the CMP sensor.
8. Install the exhaust CMP sensor.
9. Install the camshaft cover.