Tools Required

1. Remove the camshaft cover. Refer to Camshaft Cover Replacement .
2. Remove the intake camshaft position (CMP) sensor. Refer to Camshaft Position Sensor Replacement - Intake for the 3.5L (L52) engine.
3. Rotate the crankshaft in the engine rotational direction clockwise, until the #1 piston is at top dead center (TDC) on the compression stroke.
4. Using the timing mark on the intake camshaft sprocket as a reference, make a mark on the timing chain link adjacent to it.

Caution: Refer to Camshaft Holding Tool Caution in the Preface section.




5. Install the J 44221 to the rear of the camshafts.



6. Complete the following in order to install the J-44217-45  (1).

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 wingnuts.

6.3.	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.




7. Remove and discard the intake camshaft sprocket bolt.
8. Remove the intake camshaft sprocket.
9. Clean and inspect the sprocket. Refer to Camshaft Timing Chain and Sprocket Cleaning and Inspection .

1. Install the intake camshaft sprocket into the timing chain.

Aligning the marked link (1) on the timing chain with the timing mark on the intake camshaft sprocket.

Important: 

•	To aid in aligning the sprocket to the camshaft , use a 25 mm (1 in) wrench on the hex of the camshaft to rotate

•	Ensure the alignment pin is properly engaged with the camshaft

2. Install the intake camshaft sprocket onto the intake camshaft.

Notice: Refer to Fastener Notice in the Preface section.

3. Install a NEW intake camshaft sprocket bolt.

Tighten
Tighten the bolt a first pass to 20 N·m (15 lb ft). Using the J 45059 rotate the bolt a final pass an additional 100 degrees.




4. Remove the J-44217-45  (1).



5. Remove the J 44221 from the camshafts.
6. Install the intake CMP sensor. Refer to Camshaft Position Sensor Replacement - Intake for the 3.5L (L52) engine.
7. Install the camshaft cover. Refer to Camshaft Cover Replacement .