Escalade, Suburban, Tahoe, Yukon, Denali, DenaliXL, YukonXL 1999-2005

Crankshaft Damper (Balancer)

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Removal & Installation




NOTE
A torsional damper puller tool is required to perform this procedure.

  1. Disconnect the negative battery cable.
  2.  
  3. Remove the fan shroud assembly.
  4.  
  5. Remove the fan belts, fan and pulley.
  6.  
  7. If necessary, remove the radiator.

    Click image to see an enlarged view

    Fig. Remove the accessory drive pulley bolts



    Click image to see an enlarged view

    Fig. Remove the accessory drive pulley and the damper bolt from the vehicle

  8.  
  9. Remove the accessory drive pulley (crankshaft pulley on diesel engines).
  10.  
  11. Remove the torsional damper bolt.
  12.  
  13. Remove the torsional damper using tool J-39046 or its equivalent puller.
    NOTE
    Make sure you do not lose the crankshaft key, if it has been removed.

  14.  

To install:

  1. Coat the crankshaft stub with engine oil.
  2.  
  3. Position the crankshaft key if one was used. If you pulled the crank seal, replace it with the open end facing in.
    NOTE
    The inertial weight section of the damper is attached to the hub with a rubber-like material. The correct installation procedures, with the proper tools, MUST be followed or the resultant movement of the inertial weight will destroy the tuning of the damper!

  4.  
  5. Thread the stud on the tool into the end of the crankshaft.
  6.  
  7. Position the damper on the shaft and tap it into place with a plastic mallet (lightly!). Make sure the key is in place by securing it with a little RTV sealant.
  8.  
  9. Install the bearing, washer and nut and then turn the nut until the damper is pulled into position. Remove the tool.

    Click image to see an enlarged view

    Fig. Remove the crankshaft damper using the puller tool

  10.  
  11. Make sure the damper is all the way on, then install the bolt. Refer to the Torque Specifications chart in the Engine Mechanical section of this manual under the Specification Charts sub-section for proper tightening torques.
  12.  
  13. Install the remaining components and road test the truck.
  14.  


NOTE
A torsional damper puller tool is required to perform this procedure.

  1. Disconnect the negative battery cable.
  2.  
  3. Remove the fan shroud assembly.
  4.  
  5. Remove the fan belts, fan and pulley.
  6.  
  7. If necessary, remove the radiator.

    Click image to see an enlarged view

    Fig. Remove the accessory drive pulley bolts



    Click image to see an enlarged view

    Fig. Remove the accessory drive pulley and the damper bolt from the vehicle

  8.  
  9. Remove the accessory drive pulley (crankshaft pulley on diesel engines).
  10.  
  11. Remove the torsional damper bolt.
  12.  
  13. Remove the torsional damper using tool J-39046 or its equivalent puller.
    NOTE
    Make sure you do not lose the crankshaft key, if it has been removed.

  14.  

To install:

  1. Coat the crankshaft stub with engine oil.
  2.  
  3. Position the crankshaft key if one was used. If you pulled the crank seal, replace it with the open end facing in.
    NOTE
    The inertial weight section of the damper is attached to the hub with a rubber-like material. The correct installation procedures, with the proper tools, MUST be followed or the resultant movement of the inertial weight will destroy the tuning of the damper!

  4.  
  5. Thread the stud on the tool into the end of the crankshaft.
  6.  
  7. Position the damper on the shaft and tap it into place with a plastic mallet (lightly!). Make sure the key is in place by securing it with a little RTV sealant.
  8.  
  9. Install the bearing, washer and nut and then turn the nut until the damper is pulled into position. Remove the tool.

    Click image to see an enlarged view

    Fig. Remove the crankshaft damper using the puller tool

  10.  
  11. Make sure the damper is all the way on, then install the bolt. Refer to the Torque Specifications chart for proper tightening torque.
  12.  
  13. Install the remaining components and road test the truck.
  14.  

4.8L, 5.3L & 6.0L Engines
  1. Remove the air conditioning (A/C) drive belt, if equipped.
  2.  
  3. Remove the accessory drive belt, if not equipped with A/C.
  4.  
  5. Remove the lower fan shroud.
  6.  
  7. Remove the starter motor.
    WARNING
    Important: Be certain that the teeth of tool J42386A or equivalent mesh with the teeth of the engine flywheel/flexplate. 

  8.  
  9. The crankshaft balancer is balanced as an individual component. It is not necessary to mark the balancer prior to removal.
  10.  
  11. Install tool J42386A or equivalent and bolts. Use one M10-1.5 x 120 mm and one M10-1.5 x 45 mm bolt for proper tool operation.
  12.  
  13. Remove the crankshaft balancer bolt. Do not discard the crankshaft balancer bolt. The balancer bolt will be used during the balancer installation procedure.
  14.  
  15. Use tool J41816 and J41816-2 or equivalent in order to remove the crankshaft balancer.
  16.  
  17. Clean and inspect the crankshaft balancer.

    Click image to see an enlarged view

    Fig. Use tool J42386A to prevent movement of crankshaft during removal process



    Click image to see an enlarged view

    Fig. Proper tools should be used to remove balancer/damper

  18.  

To install:


NOTE
Note the following before installation:



Make certain that the teeth of tool J42386A or equivalent mesh with the teeth of the engine flywheel/flexplate.
 
The USED crankshaft balancer bolt will be used in the first of what will be a four stage tightening process, and is utilized only to ensure that the balancer is installed completely onto the crankshaft. Use a NEW bolt and tighten as described in the second, third and fourth stages of the procedure.
 
The balancer should be positioned onto the end of the crankshaft as straight as possible prior to tool installation.
 

  1. Place the crankshaft balancer onto the end of the crankshaft.
  2.  
  3. Use tool J41665 or equivalent in order to install the crankshaft balancer.
  4.  
  5. Install the USED crankshaft balancer bolt.
  6.  
  7. Tighten the USED crankshaft balancer bolt to 240 ft. lbs. (330 Nm).
  8.  
  9. Remove the USED crankshaft balancer bolt.
    NOTE
    The nose of the crankshaft should be recessed 2.4-4.48 mm (0.094-0.176 in) into the balancer bore.

  10.  
  11. Measure for a correctly installed balancer. If the balancer is not installed to the proper dimensions, repeat the installation procedure.
  12.  
  13. Install a NEW crankshaft balancer bolt.
  14.  
  15. Tighten as follows:

    Tighten the crankshaft balancer bolt a first pass to 37 ft. lbs. (50 Nm).
     
    Tighten the crankshaft balancer bolt a second pass to 140 degrees using tool J36660A or equivalent.
     

  16.  
  17. Remove tool J42386A or equivalent and bolts.
  18.  
  19. Install the starter motor.
  20.  
  21. Install the lower fan shroud.
  22.  
  23. Install the accessory drive belt (if not equipped with A/C).
  24.  
  25. Install the A/C drive belt (if equipped).
  26.  
  27. Perform the crankshaft position (CKP) system variation learn procedure.
  28.  

5.7L & 7.4L Engines
  1. Remove the crankshaft balancer bolt and washer.
  2.  
  3. Remove the bolts and the crankshaft pulley.
  4.  
  5. Use tool J23523F or equivalent in order to remove the crankshaft balancer.
    NOTE
    Note the position and length of any front groove crankshaft balancer weight pins, if used.



    Click image to see an enlarged view

    Fig. Remove crankshaft pulley from crankshaft balancer/damper



    Click image to see an enlarged view

    Fig. Use tool J23523F or equivalent to remove balancer from crankshaft



    Click image to see an enlarged view

    Fig. Balance weight pin

  6.  

To install:

  1. Ensure that the crankshaft balancer front groove pin is the proper length and installed in the proper location, if applicable.
    WARNING
    Notice: The inertial weight section of the crankshaft balancer is assembled to the hub with a rubber type material. The correct installation procedures (with the proper tool) must be followed or movement of the inertial weight section of the hub will destroy the tuning of the crankshaft balancer.

  2.  
  3. Apply a small amount of adhesive (GM P/N United States 12346141, GM P/N Canada 10953433, or equivalent), onto the crankshaft balancer keyway in order to seal the crankshaft balancer keyway and crankshaft joint.
  4.  
  5. Install the crankshaft balancer onto the end of the crankshaft. Align the keyway of the crankshaft balancer with the crankshaft balancer woodruff key.
  6.  
  7. Install the crankshaft balancer onto the end of the crankshaft.
  8.  
  9. Use tool J23523F or equivalent in order to press the crankshaft balancer onto the crankshaft.
  10.  
  11. Install the crankshaft pulley and bolts.
  12.  
  13. Tighten the crankshaft pulley bolts to 43 ft. lbs. (58 Nm). Ensure that the crown of the crankshaft balancer washer is faced away from the engine.

    Click image to see an enlarged view

    Fig. Convex surface of washer must face away from engine

  14.  
  15. Install the crankshaft balancer washer and the bolt.
  16.  
  17. Tighten the crankshaft balancer bolt to:

    On 5.7L engine: 70 ft. lbs. (95 Nm).
     
    On 7.4L engine: 110 ft. lbs. (149 Nm).
     

  18.  

6.5L Engine
  1. Remove the crankshaft pulley retaining bolts .
  2.  
  3. Remove the crankshaft pulley.
  4.  
  5. Remove the crankshaft balancer retaining bolt and washer.
  6.  
  7. Using tool J39046 or equivalent remove the crankshaft balancer .

    Click image to see an enlarged view

    Fig. Use proper tools to remove balancer/damper

  8.  

To install:


NOTE
Important: Before installing the crankshaft balancer, check the oil seal contact area for grooving and roughness. Replace the crankshaft balancer if necessary.

  1. Tap the crankshaft balancer into place with a mallet.
  2.  
  3. Make sure that the key is in place.
  4.  
  5. Make sure that the crankshaft balancer is completely installed on the crankshaft.
  6.  
  7. Install the bolt and the washer.
  8.  
  9. Tighten the bolt to 200 ft. lbs. (270 Nm).
  10.  
  11. Install the crankshaft pulley and bolts.
  12.  
  13. Tighten the crankshaft pulley bolts to 37 ft. lbs. (50 Nm).
  14.  

8.1L Engine
  1. Remove the air conditioning (A/C) belt.
  2.  
  3. Remove the fan.
  4.  
  5. Remove the starter motor.
    NOTE
    Important: Ensure that the teeth of the flywheel holding tool engage the engine flywheel teeth.

  6.  
  7. Install tool J42847 or equivalent to the starter bolt holes.
  8.  
  9. Tighten tool J42847 or equivalent bolts to 37 ft. lbs. (50 Nm).
  10.  
  11. Remove the crankshaft balancer bolt and washer.
  12.  
  13. Install tool J42846 or equivalent onto the end of the crankshaft.
  14.  
  15. Remove the crankshaft balancer.

    Click image to see an enlarged view

    Fig. Removing balancer with proper tool



    Click image to see an enlarged view

    Fig. Be certain balancer is fully seated on crankshaft

  16.  

To install:


NOTE
Important: The balancer should be positioned onto the end of the crankshaft as straight as possible prior to tool installation. Apply grease or clean engine oil to the inside of the crankshaft balancer or the end of the crankshaft, to prevent galling during assembly.

  1. Place the balancer onto the end of the crankshaft.
  2.  
  3. Install tool J42845 or equivalent to the crankshaft balancer.
  4.  
  5. Tighten tool until the crankshaft balancer is completely seated against the crankshaft sprocket.
  6.  
  7. Install the crankshaft bolt and washer to the crankshaft.
  8.  
  9. Tighten the crankshaft balancer bolt to 189 ft. lbs. (255 Nm).
  10.  
  11. Install the starter motor.
  12.  
  13. Install the fan.
  14.  
  15. Install the A/C belt.
  16.  

 
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