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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 1497 (Engine Mechanical - 4.2L) >> Repair Instructions >> On-Vehicle Repair Instructions >> Crankshaft Balancer Replacement >> Installation Procedure

Installation Procedure

WARNING: This page is about a different car, the 2003 Oldsmobile Bravada, 2003 GMC Envoy XL, 2003 GMC Envoy, and 2003 Chevrolet TrailBlazer. However, it is still accessible from the selected car via links, so may be relevant.
IMPORTANT: The crankshaft balancer does not have a key-way; so the crankshaft could turn when tightening, causing an improper torque. Make sure to follow the installation procedure to prevent damage.
  1. Raise the vehicle. Refer to LIFTING AND JACKING THE VEHICLE in General Information.
  2. Remove the torque converter access plug in the dry part of the oil pan.
  3. Use the torque converter holding tool from the J 44226  kit and secure the torque converter while tightening the crankshaft balancer.
  4. Install a new crankshaft balancer shim GM P/N 12573950 over the crankshaft snout, against the crankshaft gear.
  5. Using the J 41478  install and seat the crankshaft balancer.
  6. Remove the J 41478  .
    Fig 1: Installing Crankshaft Balancer
    G02128539Courtesy of GENERAL MOTORS CORP.
    NOTE: Refer to FASTENER NOTICE in Cautions and Notices.
  7. While still holding the flywheel, install the balancer washer and the bolt.

    Tighten 

    Tighten the crankshaft balancer bolt to 150 N.m (110 lb ft). Use the J 36660-A  in order to tighten the balancer bolt an additional 180 degrees.

  8. Remove the torque converter holding tool.
  9. Install the torque converter access plug into the oil pan.
  10. Lower the vehicle.
  11. Install the drive belt. Refer to DRIVE BELT REPLACEMENT   .
  12. Install the cooling fan and shroud. Refer to COOLING FAN AND SHROUD REPLACEMENT  in Engine Cooling.
    Fig 2: Installing Balancer Bolt
    G02128540Courtesy of GENERAL MOTORS CORP.
  13. Install the hood latch support. Refer to HOOD LATCH SUPPORT REPLACEMENT  in Body Front End.
  14. Install the radiator diagonal brace. Refer to BRACE REPLACEMENT - RADIATOR SUPPORT DIAGONAL  in Body Front End.
  15. Install the grill. Refer to GRILLE REPLACEMENT (GMC)  or GRILLE REPLACEMENT (OLDSMOBILE)  or GRILLE REPLACEMENT (CHEVROLET)  in Exterior Trim.
  16. Install the radiator air intake baffle. Refer to AIR INTAKE BAFFLE REPLACEMENT - RADIATOR  in Body Front End.
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