GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2009 🢒 Aveo 🢒 Preface 🢒 Dangers, Warnings, and Cautions 🢒 Timing Belt Inspection

Special Tools

    • J 42492-A Timing Belt Adjuster
    • KM-470-B Angular Torque Gage
    • J 45059 Angle Meter

Adjustment Procedure

    Warning: Refer to Battery Disconnect Warning in the Preface section.


    Object Number: 1241530 Size: SH
  1. Disconnect the negative battery cable.
  2. Disconnect the intake air temperature (IAT) sensor connector.
  3. Disconnect the air intake tube from the throttle body.
  4. Disconnect the breather tube from the valve cover.

    5. Object Number: 1241535 Size: SH
  5. Remove the air cleaner housing bolts.
  6. Remove the air cleaner housing.
  7. Remove the right front wheel. Refer to Tire and Wheel Removal and Installation.
  8. Remove the right front wheel well splash shield.

    9. Caution: Refer to Belt Dressing Caution in the Preface section.


    Object Number: 1241546 Size: SH
  9. Remove the serpentine accessory drive belt. Refer to Power Steering Pump Hoses and Pipes Replacement.
  10. Remove the upper timing belt cover bolts.
  11. Remove the upper timing belt cover.

    12. Object Number: 1241612 Size: SH
  12. Remove the crankshaft pulley bolt.
  13. Remove the crankshaft pulley.

    14. Object Number: 1241552 Size: SH
  14. Remove the lower timing belt cover bolts.
  15. Remove the lower timing belt cover.

    16. Object Number: 1241617 Size: SH
  16. Install the crankshaft pulley bolt.
  17. Rotate the crankshaft at least 1 full turn clockwise using the crankshaft pulley bolt.
  18. Align the dot on the crankshaft gear to the notch at the bottom of the rear timing belt cover.

    19. Object Number: 1241548 Size: SH
  19. Align the camshaft gear timing mark to the notch at the top of the rear timing belt cover.

    20. Object Number: 1241553 Size: SH
  20. Slightly loosen the 3 coolant pump retaining bolts.
  21. Using the J 42492-A  (1), rotate the coolant pump clockwise to add the highest tension to the timing belt.
  22. Tighten the coolant pump retaining bolts loosely.

    23. Object Number: 1241610 Size: SH
  23. Align the adjust arm hole of the timing belt automatic tensioner to the hole in the timing belt automatic tensioner bracket.
  24. Insert a 4.5 mm driver through the adjust arm hole and the tensioner bracket hole.
  25. Rotate the crankshaft 2 full turns clockwise using the crankshaft pulley bolt.
  26. Rotate the crankshaft at least 1 full turn clockwise using the crankshaft pulley bolt.
  27. Remove the driver from the timing belt automatic tensioner.
  28. Loosen the coolant pump retaining bolts.

    29. Object Number: 1241572 Size: SH
  29. Rotate the coolant pump until the adjust arm pointer of the timing belt automatic tensioner is aligned with the notch in the timing belt automatic tensioner bracket.

    30. Caution: Refer to Fastener Caution in the Preface section.

  30. Tighten the coolant pump retaining bolts.

    31. Tighten
    Tighten the coolant pump retaining bolts to 10 N·m (89 lb in).


    Object Number: 1241552 Size: SH
  31. Remove the crankshaft pulley bolt.
  32. Install the lower timing belt cover.
  33. Install the lower timing belt cover bolts.

    34. Tighten
    Tighten the lower timing belt cover bolts to 10 N·m (89 lb in).


    Object Number: 1241612 Size: SH
  34. Install the crankshaft pulley.
  35. Install the crankshaft pulley bolt.

    36. Tighten

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

    Object Number: 1241546 Size: SH
  36. Install the upper timing belt cover.
  37. Install the upper timing belt cover bolts.

    38. Tighten
    Tighten the upper timing belt cover bolts to 10 N·m (89 lb in).

    Caution: Refer to Belt Dressing Caution in the Preface section.

  38. Install the serpentine accessory drive belt. Refer to Power Steering Pump Hoses and Pipes Replacement.

    39. Object Number: 1241549 Size: SH
  39. Install the right front wheel well splash shield.
  40. Install the right front wheel. Refer to Tire and Wheel Removal and Installation.
  41. Install the air cleaner housing.
  42. Install the air cleaner housing bolts.

    43. Tighten
    Tighten the air filter housing bolts to 12 N·m (106 lb in).


    Object Number: 1241530 Size: SH
  43. Connect the air intake tube to the throttle body.
  44. Connect the breather tube to the valve cover.
  45. Connect the IAT sensor connector.
  46. Connect the negative battery cable.