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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 1021 (Engine Mechanical - 8.1L) >> Repair Instructions >> Off-Vehicle Repair Instructions >> Crankshaft Balancer Installation

Crankshaft Balancer Installation

WARNING: This page is about a different car, the 2004 GMC Sierra, 2004 GMC Cab & Chassis Sierra, 2004 Chevrolet Silverado, and 2004 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.

Tools Required

    NOTE: Refer to Fastener Notice in Cautions and Notices.
    IMPORTANT:
    • Ensure that the teeth of the flywheel holding tool engage the engine flywheel teeth.
    • The balancer should be positioned onto the end of the crankshaft as straight as possible prior to tool installation.
  1. Install the J 42847  (1) to the starter bolt holes.

    Tighten:  Tighten the J 42847  bolts to 50 N.m (37 lb ft).

  2. Fig 1: View Of J 42847 & Bolts
    GM1310048Courtesy of GENERAL MOTORS CORP.
    IMPORTANT: Apply grease or clean engine oil to the inside of the crankshaft balancer or the end of the crankshaft, to prevent galling during assembly.
  3. Install the balancer onto the end of the crankshaft.
  4. Fig 2: View Of Crankshaft Balancer
    GM639537Courtesy of GENERAL MOTORS CORP.
    IMPORTANT: Apply the lubricant that comes with J 42845  each time the tool is used. Failure to lubricate J 42845  may prevent the balancer from installing completely.
  5. Use the J 42845  (1) in order to install the balancer.
  6. NOTE: Ensure the crankshaft balancer is installed to the proper depth. The crankshaft balancer nose must be seated against the crankshaft sprocket. Failure to install the crankshaft balancer properly may result in improper torque to the crankshaft balancer bolt. An improperly torqued crankshaft balancer bolt may loosen causing serious engine damage.
  7. Tighten the J 42845  until the crankshaft balancer is completely seated against the crankshaft sprocket.
  8. Fig 3: Installing Crankshaft Balancer Using J 42845
    GM639539Courtesy of GENERAL MOTORS CORP.
  9. Remove the J 42845  from the crankshaft.
  10. Fig 4: View Of J 42845
    GM639542Courtesy of GENERAL MOTORS CORP.
  11. Install the crankshaft balancer washer and bolt.

    Tighten:  Tighten the crankshaft balancer bolt to 255 N.m (189 lb ft).

  12. Fig 5: View Of Crankshaft Balancer Bolt & Washer
    GM470799Courtesy of GENERAL MOTORS CORP.
  13. Remove the J 42847  (1).
  14. Fig 6: View Of J 42847 & Bolts
    GM1310048Courtesy of GENERAL MOTORS CORP.