Primary Camshaft Drive Chain and Sprockets Replacement

Primary Camshaft Drive Chain and Sprockets Replacement

Tools Required

J 39946 Crankshaft Socket - 4.0L and 4.6L

Removal Procedure

1. Remove the oil pump. Refer to Oil Pump Replacement (Service and Repair).




2. Align the primary timing marks (1) using the J 39946.
3. Remove the secondary camshaft drive chains. Refer to Secondary Camshaft Drive Chain Replacement - Right Side (Secondary Camshaft Drive Chain Replacement - Right) andSecondary Camshaft Drive Chain Replacement - Left Side (Secondary Camshaft Drive Chain Replacement - Left).
4. Remove the primary drive chain tensioner. Refer to Primary Camshaft Drive Chain Tensioner Replacement (Primary Camshaft Drive Chain Tensioner Replacement).




5. Remove the camshaft intermediate sprocket retaining bolt (3).
6. Remove the following as an assembly:

* The primary camshaft drive chain (4)
* The crankshaft sprocket
* The camshaft intermediate sprocket

7. Clean and inspect the camshaft timing drive components. Refer to Camshaft Timing Drive Components Cleaning and Inspection ().

Installation Procedure




1. Align the timing marks (1) of the camshaft intermediate and crankshaft sprockets. The marks should be aligned vertically in the installed position.
2. Install the primary camshaft drive chain on the drive sprockets.
3. Make sure that the number 1 piston is at top dead center (TDC) and the crankshaft keyway is approximately at the 1 o'clock position.




4. Use the J 39946 to align the crankshaft key (1) with the drive sprocket.
5. Install the following as an assembly:

* The primary camshaft drive chain (4)
* The crankshaft sprocket
* The camshaft intermediate sprocket

Notice: Refer to Fastener Notice.

6. Install the camshaft intermediate sprocket retaining bolt (3).

Tighten the camshaft intermediate sprocket retaining bolt to 60 N.m (44 lb ft).

Important: DO NOT remove the pin holding the tensioner until the secondary timing chains are installed.


7. Install the primary drive chain tensioner. Refer to Primary Camshaft Drive Chain Tensioner Replacement (Primary Camshaft Drive Chain Tensioner Replacement).
8. Install the secondary camshaft drive chains. Refer to Secondary Camshaft Drive Chain Replacement - Left Side (Secondary Camshaft Drive Chain Replacement - Left) andSecondary Camshaft Drive Chain Replacement - Right Side (Secondary Camshaft Drive Chain Replacement - Right).
9. Remove the pin from the primary timing chain tensioner release lever.




10. Ensure the primary timing marks (1) are aligned vertically.
11. Install the oil pump. Refer to Oil Pump Replacement (Service and Repair).