GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2004 🢒 Epica 🢒 Preface 🢒 Cautions and Notices 🢒 Timing Belt Inspection

Adjustment Procedure

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


    Object Number: 1252137 Size: SH
  1. Disconnect the negative battery cable.
  2. Remove the spark plug cover.
  3. Remove the surge tank mounting bolts.
  4. Remove the surge tank.

    5. Object Number: 1252136 Size: SH
  5. Remove the air intake tube from the throttle body.
  6. Remove the breather tube from the valve cover.
  7. Remove the right front wheel. Refer to Tire and Wheel Removal and Installation in Tires and Wheels.
  8. Remove the right front wheel well splash shield. Refer to Wheelhouse Splash Shield Replacement in Body Front End.

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


    Object Number: 1252119 Size: SH
  9. Remove the power steering pump drive belt. Refer to Power Steering Pump Belt Replacement in Power Steering System.
  10. Remove the crankshaft pulley bolts.
  11. Remove the crankshaft pulley.
  12. Remove the right engine mount bracket. Refer to Engine Mount Replacement .

    13. Object Number: 1252120 Size: SH
  13. Remove the front timing belt cover bolts.
  14. Remove the front timing belt cover.

    15. Object Number: 1252132 Size: SH
  15. Rotate the crankshaft at least 1 full turn clockwise using the crankshaft gear bolt.
  16. Align the mark on the crankshaft gear with the notch at the bottom of the rear timing belt cover.

    17. Object Number: 1252131 Size: SH
  17. Align the camshaft gear timing marks. Use the exhaust gear mark for the exhaust gear (2) and the intake gear mark for the intake gear (1), since the gears are interchangeable.

    18. Object Number: 1252138 Size: SH
  18. Loosen the automatic tensioner bolt. To tighten the belt tension, turn the hex-key tab counterclockwise.
  19. Rotate the automatic tensioner hex-key tab clockwise until the adjust arm pointer of the timing belt automatic tensioner is aligned with the notch in the timing belt automatic tensioner bracket.

    20. Object Number: 1252132 Size: SH
  20. Tighten the automatic tensioner bolt.
  21. Rotate the crankshaft 2 full turns clockwise using the crankshaft gear bolt.
  22. Inspect the automatic tensioner pointer.

    23. Object Number: 1252140 Size: SH
  23. When the adjust arm pointer of the timing belt automatic tensioner is aligned with the notch on the timing belt automatic tensioner bracket, the belt is tensioned correctly.

    24. Tighten
    Tighten the automatic tensioner bolt to 25 N·m (18 lb ft).


    Object Number: 1252120 Size: SH
  24. Install the front timing belt cover.
  25. Install the front timing belt cover bolts.

    26. Tighten
    Tighten the front timing belt cover bolts to 6 N·m (53 lb in).


    Object Number: 1252119 Size: SH
  26. Install the crankshaft pulley.
  27. Install the crankshaft pulley bolts.

    28. Tighten
    Tighten the crankshaft pulley bolts to 20 N·m (15 lb ft).

  28. Install the right engine mount bracket. Refer to Engine Mount Replacement .

    29. Notice: Refer to Belt Dressing Notice in the Preface section.

  29. Install the power steering pump. Refer to Power Steering Pump Belt Replacement in Power Steering System.

    30. Object Number: 1252136 Size: SH
  30. Install the right front wheel well and splash shield. Refer to Wheelhouse Splash Shield Replacement in Body Front End.
  31. Install the right front wheel. Refer to Tire and Wheel Removal and Installation in Tires and Wheels.
  32. Connect the air intake tube to the throttle body.
  33. Connect the breather tube to the valve cover.
  34. Connect the negative battery cable.