2. Timing Belt Adjustment

TIMING BELT ADJUSTMENT

Tools Required
J 42492-A Timing Belt Adjuster
J 45059 Angle Meter
KM-470-B Angular Torque Gauge

Adjustment Procedure

CAUTION: Unless directed otherwise, the ignition and start switch must be in the OFF or LOCK position, and all electrical loads must be OFF before servicing any electrical component. Disconnect the negative battery cable to prevent an electrical spark should a tool or equipment come in contact with an exposed electrical terminal. Failure to follow these precautions may result in personal injury and/or damage to the vehicle or its components.

FOR VEHICLES EQUIPPED WITH ONSTAR (UE1) WITH BACK UP BATTERY:
The Back Up Battery is a redundant power supply to allow limited OnStar functionality in the event of a main vehicle battery power disruption to the VCIM (OnStar module). Do not disconnect the main vehicle battery or remove the OnStar fuse with the ignition key in any position other than OFF. Retained accessory power (RAP) should be allowed to time out or be disabled (simply opening the driver door should disable RAP) before disconnecting power. Disconnecting power to the OnStar module in any way while the ignition is On or with RAP activated may cause activation of the OnStar Back-Up Battery (BUB) system and will discharge and permanently damage the back-up battery. Once the Back-Up Battery is activated it will stay on until it has completely discharged. The BUB is not rechargeable and once activated the BUB must be replaced.





1. Disconnect the negative battery cable.

2. Disconnect the intake air temperature (IAT) sensor connector.
3. Remove the air intake tube from the throttle body.
4. Remove the breather tube from the valve cover.






5. Remove the air filter housing bolts.
6. Remove the air filter housing.
7. Remove the right front wheel.
8. Remove the right front splash shield.






9. Remove the accessory drive belt.
10. Remove the crankshaft pulley bolt.
11. Remove the crankshaft pulley.






12. Remove the upper front timing belt cover bolts.
13. Remove the upper front timing belt cover.
14. Remove the lower front timing belt cover bolts.
15. Remove the lower front timing belt cover.
16. Remove the power steering pump mounting bolts, if equipped.
17. Install the crankshaft pulley bolt.






18. Rotate the crankshaft at least one full turn clockwise using the crankshaft pulley bolt.
19. Align the mark on the crankshaft gear to the notch at the bottom of the rear timing belt cover.






20. Align the camshaft gear timing marks.






21. Slightly loosen the coolant pump retaining bolts.
22. Rotate the coolant pump clockwise using the J 42492-A (1).






23. Rotate the coolant pump clockwise until the adjust arm pointer of the timing belt automatic tensioner is aligned to the notch in the timing belt automatic tensioner bracket.

Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.






24. Tighten the coolant pump retaining bolts.
25. Rotate the crankshaft 2 full turns clockwise using the crankshaft pulley.
26. Loosen the coolant pump retaining bolts.






27. Use the J 42492-A , rotate the coolant pump until the adjust arm pointer of the timing belt automatic tensioner is aligned with the pointer on the timing belt automatic tensioner bracket.






28. Tighten the coolant pump retaining bolts.

Tighten
Coolant pump retaining bolts to 10 Nm (89 lb in).

29. Remove the crankshaft pulley bolt.
30. Install the upper and lower front timing belt cover.
31. Install the upper and lower front timing belt cover bolts.

Tighten
Upper and lower front timing belt cover bolts to 10 Nm (89 lb in).






32. Install the crankshaft pulley.
33. Install the crankshaft pulley bolt.

Tighten
Crankshaft pulley bolt to 95 Nm (70 lb ft) using a torque wrench. Using the J 45059 or KM-470-B , tighten the crankshaft pulley bolt 30 degrees plus 15 degrees.

34. Install the accessory drive belt.






35. Install the right front wheel.
36. Install the air filter housing.
37. Install the air filter housing bolts.

Tighten
Air filter housing bolts to 8 Nm (71 lb in).






38. Connect the air intake tube to the throttle body.
39. Connect the breather tube to the valve cover.
40. Connect the IAT sensor connector.
41. Connect the negative battery cable.