Primary Camshaft Drive Chain and Sprockets Replacement

Primary Camshaft Drive Chain and Sprockets Replacement

Special Tools

J 39946 Crankshaft Socket - 4.0L and 4.6L

Removal Procedure

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




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) and Secondary 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 oil outlet tube (2).
6. Remove the primary camshaft drive chain guide bolts and guide.




7. Remove the camshaft intermediate sprocket retaining bolt.




8. Remove the following as an assembly:

* The primary camshaft drive chain (3)
* The crankshaft sprocket
* The camshaft intermediate sprocket

9. Clean and inspect the camshaft timing drive components (1, 2, 3, 4). 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. Use the J 39946 to rotate the crankshaft until the crankshaft keyway is approximately at the 1 o'clock position.
4. Install the following as an assembly:

* The primary camshaft drive chain (3)
* The crankshaft sprocket
* The camshaft intermediate sprocket





Caution: Refer to Fastener Caution (Fastener Caution).

5. Install the camshaft intermediate sprocket retaining bolt and tighten to 60 Nm (44 lb ft).




6. Install the primary drive chain guide (1).
7. Install the primary drive chain guide bolts and tighten to 25 Nm (18 lb ft).
8. Install the primary drive chain tensioner. Refer to Primary Camshaft Drive Chain Tensioner Replacement (Primary Camshaft Drive Chain Tensioner Replacement).




9. Install the oil outlet tube (2) and bolts and tighten to 10 Nm (89 lb in).
10. Install the secondary camshaft drive chains. Refer to Secondary Camshaft Drive Chain Replacement - Left Side (Secondary Camshaft Drive Chain Replacement - Left) and Secondary Camshaft Drive Chain Replacement - Right Side (Secondary Camshaft Drive Chain Replacement - Right).
11. Remove the pin from the primary timing chain tensioner release lever.




12. Ensure the primary timing marks (1) are aligned vertically.
13. Install the oil pump. Refer to Oil Pump Replacement (Oil Pump Replacement).