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Installation Procedure

WARNING: This page is about a different variant/trim than selected.
    Fig 1: Camshaft Position Actuator Adjuster Closure Bolt
    GM2026844Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    Do not tighten the camshaft adjuster bolts.

  1. Install the camshaft position actuator adjuster (3).
  2. Install NEW camshaft position actuator adjuster bolts (2).
    3. CAUTION:

    Refer to Fastener Caution .

    CAUTION:

    Refer to Torque-to-Yield Fastener Caution .

    NOTE:

    A second technician is required.

  3. Tighten the camshaft position actuator adjuster bolts (2) in three passes:

    Hold at the appropriate camshaft hexagon.

    1. First pass tighten to 65 N.m (48 lb ft).
    2. Second pass to 120°.
    3. Third pass to 15°.
  4. Replace the camshaft position actuator adjuster seal rings.
  5. Install the 2 camshaft position actuator adjuster closure plugs (1) and tighten to 30 N.m (22 lb ft).
  6. Remove the EN-6628-A  locking tool.
    7. Fig 2: Timing Belt Tensioner
    GM2027017Courtesy of GENERAL MOTORS COMPANY
  7. Clean the timing belt tensioner thread.
  8. Install the timing belt tensioner (2) and tighten the NEW timing belt tensioner bolt (1) to 20 N.m (15 lb ft).
  9. Clean the timing belt idler pulley thread.
    10. Fig 3: Timing Belt Idler Pulley Bolt
    GM2026843Courtesy of GENERAL MOTORS COMPANY
  10. Install the timing belt idler pulley (2) and tighten the NEW bolt (1) to 25 N.m (18 lb ft).
    11. Fig 4: Aligning Timing Belt Drive Gear And Oil Pump Housing
    GM2027014Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    The timing belt drive gear and oil pump housing must align.

  11. Turn the crankshaft in the direction of engine rotation, by the crankshaft balancer bolt, to cylinder 1 TDC of combustion stroke.
    12. Fig 5: Flywheel And Flywheel Holder
    GM2026535Courtesy of GENERAL MOTORS COMPANY
  12. Install the EN-652  flywheel holder (1), lock the flywheel (2) (or automatic transmission flex respectively) via the starter ring gear.
    13. Fig 6: Timing Belt And Timing Belt Tensioner
    GM2026841Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    Observe direction of rotation.

  13. Insert the timing belt (1).
  14. Apply preliminary tension clockwise to the timing belt tension roller.
  15. Remove the EN-6333  locking pin.
  16. Release the tension on the timing belt tensioner.
    17. Fig 7: Timing Belt Lower Front Cover
    GM2026840Courtesy of GENERAL MOTORS COMPANY
  17. Install the lower front timing belt cover (1) and tighten the 4 bolts (2) to 6 N.m (53 lb in).
    18. Fig 8: Crankshaft Balancer And Bolt
    GM2026822Courtesy of GENERAL MOTORS COMPANY
  18. Install the crankshaft balancer (2) and NEW bolt (1) and tighten in 3 passes using the EN-45059  sensor kit :
    1. First pass to 95 N.m (70 lb ft).
    2. Second pass to 45°.
    3. Third pass to 15°.
  19. Remove the EN-652  flywheel holder to unlock the crankshaft.
  20. Remove the EN-6340  locking tool.
  21. Check position of the camshaft position actuator adjuster.
    1. Turn crankshaft 720° in the direction of engine rotation by the crankshaft balancer bolt.
      2. NOTE:

      Note marking, camshaft position actuator adjuster.

    2. Insert EN-6340  locking tool into camshaft timing gears.
    22. Fig 9: Locking Tool
    GM2026534Courtesy of GENERAL MOTORS COMPANY
  22. Insert the EN-6628-A  locking tool (1) into the camshafts.
  23. Align camshafts by hexagon until EN-6628-A  locking tool can be inserted in both camshafts.
    24. Fig 10: Crankshaft TDC Position
    GM1936993Courtesy of GENERAL MOTORS COMPANY
  24. Check the crankshaft position.
  25. Marking on crankshaft balancer must align with marking on timing belt lower cover, see mark (1).
  26. Remove the EN-6628-A  locking tool.
  27. Install the camshaft cover. Refer to Camshaft Cover Installation .
  28. Install the timing belt upper front cover. Refer to Timing Belt Upper Front Cover Installation .
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