GM Service Manual Online
For 1990-2009 cars only

Special Tools

    • EN 6333 Timing Belt Tensioner Locking Pin
    • EN 6625 Crankshaft Locking Device
    • EN 6340 Camshaft Locking Tool

For equivalent regional tools, refer to Special Tools.

Removal Procedure

  1. Remove the air cleaner housing. Refer to Air Cleaner Assembly Replacement.
  2. Remove the timing belt upper front cover. Refer to Timing Belt Upper Front Cover Removal.
  3. Raise the vehicle by its full height. Refer to Lifting and Jacking the Vehicle.
  4. Remove the front compartment splash shield. Refer to Front Compartment Splash Shield Replacement.
  5. Remove the drive belt tensioner. Refer to Drive Belt Tensioner Replacement.
  6. Lower the vehicle by its full height.

  7. Object Number: 1936993  Size: SH
  8. Set crankshaft balancer in direction of engine rotation to "cylinder 1 TDC of combustion stroke" (1).

  9. Object Number: 1944920  Size: SH
  10. Prepare the right half of the EN 6340 locking tool .
  11. 8.1. Remove the 2 bolts (2)
    8.2. Remove the front panel (1)

    Object Number: 1944922  Size: SH
  12. Install the EN 6340 locking tool into the camshaft adjusters.
  13.    Note: The spot-type marking (4) on the intake camshaft adjuster does not correspond to the groove of KM-6340-Left during this process but must be somewhat above as shown.

    • Install the EN 6340-Left locking tool  (1) in the camshaft adjusters as shown.

       Note: The spot type marking (3) on the exhaust camshaft adjuster must correspond to the groove on KM-6340-Right.

    • Install EN 6340-Right locking tool  (2) in the camshaft adjusters as shown.
  14. Remove EN 6340 locking tool .
  15. Raise the vehicle by its full height. Refer to  Lifting and Jacking the Vehicle.

  16. Object Number: 2026543  Size: SH
  17. Remove the bolt (1).

  18. Object Number: 2027000  Size: SH
  19. Install EN 6625 locking device  (2) to block the crankshaft.
  20. Install the bolt (1).
  21. Remove the crankshaft balancer. Refer to Crankshaft Balancer Removal.
  22. Remove the engine mount bracket. Refer to Engine Mount Bracket Replacement - Right Side.
  23. Remove the timing belt center front cover. Refer to Timing Belt Center Front Cover Removal.
  24. Remove the timing belt lower front cover. Refer to Timing Belt Lower Front Cover Removal.

  25. Object Number: 1937014  Size: SH
  26. Loosen the timing belt tensioner bolt.
  27. Apply tension to the drive belt tensioner (2) in the direction of the arrow, using an allen key (1).
  28. Install the EN 6333 locking pin  (3).
  29. Remove the timing belt tensioner bolt and the timing belt tensioner.

Installation Procedure

  1. Clean the timing belt tensioner thread.

  2. Object Number: 1937014  Size: SH
  3. Install the timing belt tensioner.
  4. Install the timing belt tensioner bolt.
  5. Apply tension to the drive belt tensioner (2) in the direction of the arrow, using an allen key (1).
  6. Remove the EN 6333 locking pin  (3).
  7. Note: The timing belt tensioner moves automatically to the correct position.

  8. Release tension on timing belt tensioner.
  9. Caution: Refer to Fastener Caution in the Preface section.

  10. Tighten the timing belt tensioner bolt to  20 N·m (15 lb ft).
  11. Install the timing belt lower front cover. Refer to Timing Belt Lower Front Cover Installation.
  12. Install the timing belt center front cover (OFF). Refer to Timing Belt Center Front Cover Installation.
  13. Install the engine mount bracket. Refer to Engine Mount Bracket Replacement - Right Side.
  14. Install the crankshaft balancer. Refer to Crankshaft Balancer Installation.

  15. Object Number: 2027000  Size: SH
  16. Remove bolt (1).
  17. Remove EN 6625 locking device  (2) to block the crankshaft.

  18. Object Number: 2026543  Size: SH
  19. Install the bolt (1) and tighten to  75 N·m (56 lb ft).
  20. Lower the vehicle by its full height. Refer to  Lifting and Jacking the Vehicle.

  21. Object Number: 1944922  Size: SH
  22. Timing check.
  23.    Note: Note the marking at the camshaft sprockets.

    • Turn the crankshaft 720 degrees in the direction of engine rotation by the bolt on the crankshaft balancer.

       Note: The spot-type marking (4) on the intake camshaft adjuster does not correspond to the groove of KM-6340-Left during this process but must be somewhat above as shown.

    • Install EN 6340-Left locking tool  (1) into the camshaft adjusters as shown.

       Note: The spot type marking (3) on the exhaust camshaft adjuster must correspond to the groove on KM-6340-Right.

    • Install EN 6340-Right locking tool  (2) into the camshaft adjusters as shown.
    • Raise the vehicle by its full height. Refer to  Lifting and Jacking the Vehicle.
  24. Remove the EN 6340 locking tool .

  25. Object Number: 1936993  Size: SH

    Note: Note the marking at the crankshaft balancer and the cover.

  26. Control the crankshaft balancer position.
  27. Markings on torsional crankshaft balancer (1) and lower cover (1) must align.

  28. Raise the vehicle by its full height.
  29. Install the drive belt tensioner. Refer to  Drive Belt Tensioner Replacement.
  30. Install the front compartment splash shield. Refer to Front Compartment Splash Shield Replacement.
  31. Lower the vehicle by its full height.
  32. Install the timing belt upper front cover. Refer to  Timing Belt Upper Front Cover Installation.
  33. Install the air cleaner housing. Refer to  Air Cleaner Assembly Replacement.