Timing Cover: Service and Repair

REMOVAL PROCEDURE
1. Remove the torque axis mount. Refer to Engine Mount Replacement.
2. Remove the torque axis mount bracket. Refer to Engine Mount Bracket Replacement.
3. Remove the drive belt. Refer to Drive Belt Tensioner Replacement (VIN 1 - Supercharger).
4. For Engine Code 1, remove the drive belt idler pulley. Remove the pulley bracket. Refer to Drive Belt Idler Pulley Replacement.
5. Remove the drive belt tensioner assembly. Refer to Drive Belt Tensioner Replacement (VIN 1 - Supercharger).
6. Remove the crankshaft balancer. Refer to Crankshaft Balancer Replacement.





7. Remove the crankshaft sensor shield.
8. Remove the crankshaft sensor.
9. Remove the oil pan to the front cover bolts,





10. Remove the front cover attaching bolts.
11. Remove the front cover.
12. Inspect the timing chain for overall in and out movement. Movement should not exceed 25 mm (1 inch).
13. Inspect the sprockets for wear.
14. Clean the gasket mating surfaces at the timing chain cover, and cylinder block.
15. If the oil pan gasket is excessively swollen, the oil pan must be removed and the gasket replaced.


INSTALLATION PROCEDURE

^ Tools Required
- J 36660 Torque Angle Meter





1. Install the gasket at the cylinder block.





2. Install the front cover.
3. Apply sealant GM P/N 12346004 or equivalent to the bolt threads.
4. Install the front cover attaching bolts.
^ Tighten the bolts to 15 Nm (11 ft. lbs.). Use the J 36660 in order to rotate the bolts an additional 40°.

NOTICE: Refer to Fastener Notice in Service Precautions.

5. Install the oil pan to the front cover bolts.
^ Tighten the bolts to 14 Nm (125 inch lbs.).

6. Install the drive belt tensioner assembly. For the VIN 1, refer to Drive Belt Tensioner Replacement (VIN 1) and to Drive Belt Tensioner Replacement (VIN 1 - Supercharger).
7. For Engine Code 1, install the drive belt idler pulley. Install the pulley bracket. Refer to Drive Belt Idler Pulley Replacement.





8. Install the crankshaft sensor.

IMPORTANT: Do not adjust the crankshaft sensor.

9. Install the crankshaft sensor shield.
10. Install the crankshaft balancer and bolt. Refer to Crankshaft Balancer Replacement.

NOTICE: This bolt is designed to permanently stretch when tightened. The correct part number fastener must be used to replace this type of fastener. Do not use a bolt that is stronger in this application. If the correct bolt is not used, the parts will not be tightened correctly. The system or the components may be damaged.

11. Install the drive belt. Refer to Drive Belt Replacement (VIN 1).
12. Install the torque axis mount bracket. Refer to Engine Mount Bracket Replacement.
13. Install the torque axis mount. Refer to Engine Mount Replacement.