68. Timing Chain and Sprocket Installation

Timing Chain and Sprocket Installation

Special Tools
* EN 46330 - Timing Belt Tensioner Retaining Pin
* J 41478 - Crankshaft Front Oil Seal Installer
* J 41665 - Crankshaft Balancer and Sprocket Installer
* J 42386-A - Flywheel Holding Tool
* J 45059 - Angle Meter

For equivalent regional tools, refer to Special Tools (5.3L) (Special Tools)Special Tools (6.0L) (Special Tools)




1. Install the key into the crankshaft keyway, if previously removed.




2. Tap the key (122) into the keyway until both ends of the key bottom onto the crankshaft.




3. Install the crankshaft sprocket (207) onto the front of the crankshaft. Align the crankshaft key with the crankshaft sprocket keyway.




4. Use the J 41478 - installer (1) and the J 41665 - installer (2) in order to install the crankshaft sprocket.
Install the sprocket onto the crankshaft until fully seated against the crankshaft flange.
5. Rotate the crankshaft sprocket until the alignment mark is in the 12 o'clock position.




6. Compress the timing chain tensioner guide and install the EN 46330 - pin.





Caution: Refer to Fastener Caution (Fastener Caution).

7. Install the timing chain tensioner (232) and bolts (231) and tighten to 25 Nm (18 lb ft).





Note:
* The sprocket teeth and timing chain must mesh.
* The camshaft and the crankshaft sprocket alignment marks MUST be aligned properly.

8. Install the camshaft sprocket (205), timing chain (208), and bolt (206).




9. Inspect the sprockets for proper alignment. The mark on the camshaft sprocket (1) should be located in the 6 o'clock position and the mark on the crankshaft sprocket (2) should be located in the 12 o'clock position.




10. Remove the EN 46330 - pin.

Note: Do not apply threadlock to the flex plate bolts at this time.

11. Temporarily install the automatic transmission flex plate or manual transmission flywheel and bolts. Refer to Engine Flywheel Installation (5.3L) (Overhaul)Engine Flywheel Installation (6.0L) (Overhaul).




12. Install the J 42386-A - tool and bolts. Use 1 M10-1.5 x 120 mm bolt and 1 M10-1.5 x 45 mm bolt for proper tool operation and tighten J 42386-A - tool to 50 Nm (37 lb ft).




13. Tighten the camshaft sprocket bolt.

1. Tighten the camshaft sprocket bolt a first pass to 75 Nm (55 lb ft).
2. Tighten the camshaft sprocket bolt a final pass an additional 50 degrees using the J 45059 - meter.

14. Remove the J 42386-A - tool and bolts.
15. Remove the automatic transmission flex plate or manual transmission flywheel and bolts. Refer to Engine Flywheel Removal (Overhaul).