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Home >> Cadillac >> 2004 >> CTS Base, 3.6 7 >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 7 (Engine Mechanical - 3.2L) >> Repair Instructions >> On-Vehicle Repair Instructions >> Timing Belt Replacement >> Installation and Initial Adjustment Procedure

Installation and Initial Adjustment Procedure

WARNING: This page is about a different variant/trim than selected.
NOTE: When installing a new or used timing belt, the directional arrows on the timing belt must be matched with the rotation of the crankshaft. If this precaution is not observed, excessive wear and timing belt failure may occur.
    Fig 1: Identifying Guide Marks
    GM826215Courtesy of GENERAL MOTORS CORP.
    IMPORTANT:
    • Guide marks are printed on the timing belt to aid in installation. If these marks are not identifiable, install a new belt.
    • Arrows are printed on the timing belt indicating the required direction of travel. When installing the timing belt, ensure the arrows are traveling in engine rotational direction, clockwise.
    • Install the timing belt with the engine at room temperature.
    • Do not crimp or bind the timing belt when handling or installing.
  1. Inspect the timing belt. Refer to Timing Belt Inspection .
    2. Fig 2: Aligning Double Dash TDC Mark On Timing Belt With Marks On The Oil Pump Housing & Crankshaft Sprocket
    GM345370Courtesy of GENERAL MOTORS CORP.
  2. Start at the crankshaft sprocket by aligning the double dash TDC mark on the timing belt with the marks on the oil pump housing and on the crankshaft sprocket.
  3. Wedge the J 42069-30 between the oil pump housing and timing belt in order to prevent the belt teeth from jumping the crankshaft sprocket teeth.
    4. Fig 3: Identifying Timing Belt Components
    GM345867Courtesy of GENERAL MOTORS CORP.
  4. Route the timing belt through the timing belt tensioner (2).
  5. Slip the timing belt through camshaft gears 1 and 2 simultaneously (3), ensuring the dash marks on the timing belt align with the marks on the camshaft gears and the notches on the rear timing belt cover.
  6. Route the timing belt through the upper idler pulley (4).
  7. Slip the timing belt through camshaft gears 3 and 4 simultaneously (6), ensuring the dash marks on the timing belt align with the marks on the camshaft gears and the notches on the rear timing belt cover.
    8. Fig 4: Rotating Crankshaft Counter Clockwise To 3 Degrees BTDC, Allowing Timing Belt To Slide On The J 42069-30
    GM826218Courtesy of GENERAL MOTORS CORP.
  8. Using the J 42098  rotate the crankshaft counter clockwise to 3 degrees BTDC, allowing the timing belt to slide on the J 42069-30. See Special Tools and Equipment .
  9. Install the lower idler pulley and spacer with the timing belt.
    10. NOTE: Refer to Fastener Notice in Cautions and Notices.
  10. Install the lower idler pulley bolt.

    Tighten:  Tighten the lower idler pulley bolt to 40 N.m (30 lb ft).

    11. Fig 5: Turning Crankshaft Back To TDC
    GM826214Courtesy of GENERAL MOTORS CORP.
  11. Turn the crankshaft back to TDC, using the J 42098  . See Special Tools and Equipment .
    12. Fig 6: Tightening Idler Pulley
    GM825553Courtesy of GENERAL MOTORS CORP.
  12. Apply tension to the timing belt, at the upper idler pulley by turning the high point of the eccentric to approximately the 9 o'clock position. Tighten the idler pulley locking bolt, while holding the eccentric with the J 42069-40, until snug.

    The idler pulley bolt will be tightened to specifications after all final adjustments are made.

    13. Fig 7: Setting Initial Timing Belt Tension
    GM345812Courtesy of GENERAL MOTORS CORP.
  13. Set the initial timing belt tension:
    1. Rotate the tensioner eccentric counter clockwise to full stop, turn the eccentric back until the reference mark is 1 mm (0.03 in) over the flange.
    2. Tighten the timing belt tensioner locking nut until snug.

      The locking nut will be tightened to specifications after all final adjustments are made.

    14. Fig 8: Identifying Guide Marks
    GM826215Courtesy of GENERAL MOTORS CORP.
  14. Inspect the alignment marks on the timing belt to ensure that they are aligned with the appropriate reference points on the camshaft gears, the rear timing belt cover and on the oil pump housing.
    15. Fig 9: Identifying J 42069-1 & J 42069-2
    GM345381Courtesy of GENERAL MOTORS CORP.
  15. Remove the J 42069-30, the J 42069-1 and the J 42069-2 locking tools from the engine.
    16. Fig 10: Identifying Index Mark On Oil Pump Cover
    GM828921Courtesy of GENERAL MOTORS CORP.
  16. Rotate the crankshaft clockwise 2 revolutions using the J 42098  until the #1 cylinder is 60 degrees BTDC. See Special Tools and Equipment .
    17. Fig 11: Identifying J 42069-10
    GM345377Courtesy of GENERAL MOTORS CORP.
  17. Install the J 42069-10 to the crankshaft sprocket with the knurled bolt.
  18. Rotate the crankshaft in the engine rotational direction, clockwise using the J 42098  until the lever of the J 42069-10 firmly contacts the water pump pulley flange. See Special Tools and Equipment .
  19. Secure the moveable lever of the tool to the water pump pulley flange.
    20. Fig 12: Identifying Alignment Reference Marks
    GM159005Courtesy of GENERAL MOTORS CORP.
    IMPORTANT: The alignment marks on the timing belt will no longer align with the marks on the camshaft gears after one or more engine revolutions.
  20. Inspect the alignment of the reference marks on the camshaft gears with the notches on the rear timing belt cover, as well as the mark on the crankshaft sprocket and oil pump housing.
    21. Fig 13: Identifying J 42069-20
    GM826220Courtesy of GENERAL MOTORS CORP.
    IMPORTANT: The reference marks on both sets of the camshaft gears must match exactly with the marks on the J 42069-20 checking gage.
  21. Use the J 42069-20 to inspect the alignment of the camshaft gears 3 and 4.
  22. Use the J 42069-20 to inspect the alignment of the camshaft gears 1 and 2.
  23. If timing belt adjustment IS REQUIRED, refer to Timing Belt Timing Procedure .
    24. Fig 14: Setting Final Timing Belt Tension
    GM826216Courtesy of GENERAL MOTORS CORP.
  24. If timing belt adjustment IS NOT REQUIRED, set the final timing belt tension:
    1. Loosen the timing belt eccentric locking nut.
    2. Turn the eccentric counter clockwise to full stop, then back to the following specification:
      • NEW BELT 

        Until the reference mark is 3-4 mm (0.118-0.157 in) (a) above the datum line.

      • USED BELT 

        Until the reference mark is aligned with the datum line.

        Tighten:  Tighten the timing belt tensioner eccentric locking nut to 20 N.m (15 lb ft).

    25. Fig 15: Identifying J 42069-20
    GM345823Courtesy of GENERAL MOTORS CORP.
  25. Hold the upper idler pulley eccentric in place with the J 42069-40.

    Tighten:  Tighten the upper idler pulley bolt to 40 N.m (30 lb ft).

  26. Remove the J 42069-20 from the camshaft gears.
    27. Fig 16: Identifying J 42069-10
    GM345377Courtesy of GENERAL MOTORS CORP.
  27. Remove the J 42069-10 from the engine.
    28. Fig 17: Identifying Index Mark On Oil Pump Cover
    GM828921Courtesy of GENERAL MOTORS CORP.
  28. For final inspection rotate the crankshaft in the engine rotational direction, clockwise 2 revolutions using the J 42098  until reaching 60 degrees BTDC. See Special Tools and Equipment .
    29. Fig 18: Identifying J 42069-10
    GM345377Courtesy of GENERAL MOTORS CORP.
  29. Install the J 42069-10 to the crankshaft sprocket.
  30. Rotate the crankshaft in the engine rotational direction, clockwise using the J 42098  until the lever of the J 42069-10 firmly contacts the water pump pulley flange. See Special Tools and Equipment .
  31. Secure the moveable lever of the tool to the water pump pulley flange.
    32. Fig 19: Identifying Alignment Reference Marks
    GM159005Courtesy of GENERAL MOTORS CORP.
    IMPORTANT: The alignment marks on the timing belt will no longer align with the marks on the camshaft gears after one or more engine revolutions.
  32. Inspect the alignment of the reference marks on the camshaft gears with the notches on the rear timing belt cover, as well as the mark on the crankshaft sprocket and oil pump housing.
    33. Fig 20: Identifying J 42069-20
    GM826220Courtesy of GENERAL MOTORS CORP.
  33. Use the J 42069-20 to inspect the alignment of the camshaft gears 3 and 4.
  34. Use the J 42069-20 to inspect the alignment of the camshaft gears 1 and 2.
  35. If the reference marks on the camshaft gears do not match exactly, timing belt adjustment IS REQUIRED.

    Refer toTiming Belt Timing Procedure .

  36. If the reference marks match exactly, further timing belt adjustment IS NOT necessary.

    Continue with reassembly of the engine.

  37. Remove the J 42069-10 and the J 42069-20.
  38. Install the crankshaft balancer. Refer to Crankshaft Balancer Replacement .
  39. Install the timing belt cover. Refer to Timing Belt Cover Replacement .
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