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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 906 (Engine Mechanical - 4.3L (LU3)) >> Repair Instructions >> On-Vehicle Repair Instructions >> Crankshaft Balancer Replacement >> Removal Procedure

Removal Procedure

WARNING: This page is about a different car, the 2003 GMC Sonoma, 2003 GMC Jimmy, 2003 Chevrolet S10 Pickup, and 2003 Chevrolet Blazer. However, it is still accessible from the selected car via links, so may be relevant.
  1. Disconnect the negative battery cable. Refer to BATTERY NEGATIVE CABLE DISCONNECT/CONNECT PROCEDURE in Battery.
  2. Remove the fan shroud assembly. Refer to FAN SHROUD REPLACEMENT in Engine Cooling.
  3. Remove the drive belt. Refer to Drive Belt Replacement  .
    Fig 1: Removing Fan Shroud Assembly
    G01977543Courtesy of GENERAL MOTORS CORP.
    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. Remove the bolts and the crankshaft pulley.
    Fig 2: Removing Bolts & Crankshaft Pulley
    G01977544Courtesy of GENERAL MOTORS CORP.
    NOTE: Refer to FASTENER NOTICE in Cautions and Notices.
  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 J 23523-F
    G01977545Courtesy of GENERAL MOTORS CORP.
  8. Note the position and length of any front groove pins (crankshaft balancer) (if applicable).
    Fig 4: Identifying Front Groove Pins
    G01977546Courtesy 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
      G01977547Courtesy of GENERAL MOTORS CORP.
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