Special Tools

EN-48313 Timing Chain Retention Tool

1. Remove the upper intake manifold with the lower intake manifold. Refer to Lower Intake Manifold Replacement.
2. Remove the left bank camshaft cover. Refer to Camshaft Cover Replacement - Left Side.
3. Remove the camshaft sensors. Refer to Camshaft Position Sensor Replacement - Bank 2 (Left Side) Exhaust and Camshaft Position Sensor Replacement - Bank 2 (Left Side) Intake.
4. Remove the camshaft position actuator solenoid. Refer to Camshaft Position Actuator Solenoid Valve Solenoid Replacement - Bank 2 (Left Side) Intake.




Note: Rotate the crankshaft balancer in a clockwise rotation ONLY.

5. Rotate the crankshaft using the crankshaft balancer bolt until the camshafts are in a neutral (low tension) position. The camshaft flats will be parallel with the camshaft cover rail (1).

Caution: Refer to Torque Reaction Against Timing Drive Chain Caution in the Preface section.





Note: 

•	Use an open-end wrench at the camshaft hex to prevent camshaft/engine rotation.

•	DO NOT remove the camshaft position actuator bolt at this time.

6. Loosen the camshaft position actuator bolt.



7. Unscrew the EN-48313 so that the legs of the tool are retracted.
8. Insert the EN-48313 between the camshaft actuators, rearward of the timing chain until the bottom line that is scribed in the body of the tool (2) is adjacent to the top surface of the cylinder head (1). This is the approximate installed position.




Note: The engine front cover is removed for clarity in the following graphics, but NOT required to perform the procedure.

9. Ensure that the feet (4) on the legs of the tool are facing the front of the engine.
10. Partially expand the legs (1, 3) of the EN-48313 by turning the T-shaped handle clockwise.
11. Insert the leg of the tool (1) behind the timing chain guide (2).
12. Continue expanding the EN-48313 until the legs (1, 3) contact the timing chain. Do not tighten at this time.




Note: Ensure that the foot (1) of the EN-48313 is engaged into one of the link pockets to prevent tool slippage during tightening of the EN-48313 .

13. Hand tighten the EN-48313 .

Caution: Refer to Torque Reaction Against Timing Drive Chain Caution in the Preface section.

14. Use an open end wrench on the hex cast into the left intake and exhaust camshafts and rotate the camshafts toward each other in order to create slack in the chain between the actuators.



15. The EN-48313 is now properly installed to hold the timing chain in position.




Note: Ensure that the camshaft timing chain and the camshaft position actuators are marked for proper assembly.

16. Mark the timing chain and the respective locations on the camshaft position actuators (1-4).
17. Remove the camshaft position actuator bolt.
18. Remove the camshafts. Refer to Camshaft Removal - Left Side.

Note: 

•	Ensure that the marks on the camshaft position actuator and the timing chain (1-4) are aligned.

•	DO NOT tighten the camshaft position actuator bolt at this time.

1. Locate the camshafts to the cylinder head and assemble the camshaft actuators to the camshafts.
2. Install the camshafts and the camshaft bearing caps. Refer to Camshaft Installation - Left Side.
3. Remove the EN-48313 .

Caution: Refer to Torque Reaction Against Timing Drive Chain Caution in the Preface section.





Note: Use an open-end wrench at the camshaft hex to prevent camshaft/engine rotation.

4. Install and tighten the camshaft position actuators. Refer to Camshaft Position Actuator Installation - Left Side Intake and Camshaft Position Actuator Installation - Left Side Exhaust.
5. Install the intake camshaft position actuator solenoid. Refer to Camshaft Position Actuator Solenoid Valve Solenoid Replacement - Bank 2 (Left Side) Intake.
6. Install the camshaft sensors. Refer to Camshaft Position Sensor Replacement - Bank 2 (Left Side) Exhaust and Camshaft Position Sensor Replacement - Bank 2 (Left Side) Intake.
7. Install the camshaft cover. Refer to Camshaft Cover Replacement - Left Side.
8. Install the upper intake manifold with the lower intake manifold. Refer to Lower Intake Manifold Replacement.