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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> Engine Mechanical >> Mechanical >> Engine Mechanical - 4.3L (On-Vehicle) >> Repair Instructions >> Crankshaft Balancer Replacement >> Removal Procedure

Removal Procedure

  1. Disconnect the negative battery cable. Refer to BATTERY NEGATIVE CABLE DISCONNECT/CONNECT PROCEDURE .
  2. Remove the fan shroud assembly. Refer to FAN SHROUD REPLACEMENT .
  3. Remove the drive belt. Refer to Drive Belt Replacement .
    NOTE: To prevent damage to the end of the crankshaft when using a crankshaft balancer removal tool install a bolt in the crankshaft. Use a shorter bolt with the same threads as the crankshaft balancer bolt. This bolt will allow a place for the tool to push against. The shorter bolt is to keep from going past the threads in the crankshaft and damaging the crankshaft threads.
  4. Remove the crankshaft balancer bolt and washer.
    5. Fig 1: Crankshaft Balancer Bolt & Washer
    G01661173Courtesy of GENERAL MOTORS CORP.
  5. Remove the bolts and the crankshaft pulley.
    Fig 2: Crankshaft Pulley & Bolts
    G01661174Courtesy of GENERAL MOTORS CORP.
    NOTE: Refer to FASTENER NOTICE .
  6. Use the J 23523-F  in order to remove the crankshaft balancer.
    1. 6.1. Install the J 23523-F  plate and bolts onto the crankshaft balancer.

      Tighten 

      Tighten the bolts to 25 N.m (18 lb ft).

    2. 6.2. Install the J 23523-F  forcing screw into the plate.
    3. 6.3. Rotate the J 23523-F  forcing screw clockwise in order to remove the crankshaft balancer.
  7. Remove the J 23523-F   from the crankshaft balancer.
    Fig 3: Removing Crankshaft Balancer Using J 23523-F
    G01661175Courtesy of GENERAL MOTORS CORP.
  8. Note the position and length of any front groove pins (crankshaft balancer) (if applicable).
    Fig 4: Front Groove Pin
    G01661176Courtesy of GENERAL MOTORS CORP.
  9. Clean the crankshaft balancer in cleaning solvent.
  10. Dry the crankshaft balancer with compressed air.
  11. Inspect the crankshaft balancer for the following:
    • Loose or improperly installed front groove pin (1) (crankshaft balancer)

      A properly installed front groove pin should be installed until flush or below flush with the face of the crankshaft balancer.

      Important:  A crankshaft front oil sealing surface with excessive scoring, grooves, rust, or other damage must be replaced.

    • Worn, grooved, or damaged crankshaft front oil sealing surface (2)

      Minor imperfections on the crankshaft balancer crankshaft front oil seal surface may be removed with a polishing compound or fine grade emery cloth.

    • Worn, chunking, or deteriorated rubber (3) between the hub and the outer ring
    • Worn or damaged keyway (4)
    • Worn or damaged bolt hole threads (5)
    Fig 5: Inspecting Crankshaft Balancer
    G01661177Courtesy of GENERAL MOTORS CORP.
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