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Home >> GMC >> 2006 >> Sierra 1500 HD, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1392 (Engine Mechanical - 4.3L) >> Repair Instructions - Off Vehicle >> Balance Shaft Installation >> Installation Procedure

Installation Procedure

WARNING: This page is about a different car, the 2009 GMC Sierra and 2009 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.
    Fig 1: Installing Balance Shaft
    GM5141Courtesy of GENERAL MOTORS CORP.
    NOTE: The balance shaft and the balance shaft front bearing are serviced only as an assembly. Do not remove the balance shaft front bearing from the balance shaft.
  1. Apply clean engine oil GM P/N 12345610 (Canadian P/N 993193) or equivalent, to the balance shaft front bearing.
    2. WARNING: Refer to Safety Glasses Warning .
  2. Use the J 36996:  installer and the J 8092:  handle in order to install the balance shaft.
    3. Fig 2: View of Balance Shaft Retainer & Bolts
    GM188031Courtesy of GENERAL MOTORS CORP.
    CAUTION: Refer to Fastener Caution .
  3. Install the balance shaft retainer and bolts and tighten to 12 N.m (106 lb in).
    4. Fig 3: Locating Balance Shaft Driven Gear
    GM5136Courtesy of GENERAL MOTORS CORP.
  4. Install the balance shaft driven gear onto the balance shaft.
  5. If reusing the fastener, apply threadlock GM P/N 12345382 (Canadian P/N 10953489) or equivalent, to the threads of the balance shaft driven gear bolt.
  6. Install the balance shaft driven gear bolt.
    1. Use a wrench to secure the balance shaft.

      Place the wrench onto the balance shaft near to the balance shaft front bearing.

    2. Install the balance shaft driven gear bolt.
      1. Tighten the balance shaft driven gear bolt on the first pass to 20 N.m (15 lb ft).
      2. Tighten the balance shaft driven gear bolt on the final pass using the J 45059:  meter an additional 35 degrees.
  7. Remove the wrench from the balance shaft.
  8. Rotate the balance shaft by hand in order to ensure that there is clearance between the balance shaft and the valve lifter pushrod guide. If the balance shaft does not rotate freely, check to ensure that the retaining ring on the balance shaft front bearing is seated on the case.
    9. Fig 4: View Of Balance Shaft Drive Gear
    GM9847Courtesy of GENERAL MOTORS CORP.
    NOTE: DO NOT install the camshaft sprocket bolts at this time.
  9. Install the balance shaft drive gear.
    10. Fig 5: Locating Balance Shaft Drive Gear Timing Mark In The 12 O'clock Position
    GM9848Courtesy of GENERAL MOTORS CORP.
  10. Rotate the engine camshaft so that the timing mark on the balance shaft drive gear is in the 12 o'clock position.
    11. Fig 6: View Of Balance Shaft Drive Gear
    GM9847Courtesy of GENERAL MOTORS CORP.
  11. Remove the balance shaft drive gear.
    12. Fig 7: View Of Balance Shaft Driven Gear & Timing Mark
    GM9849Courtesy of GENERAL MOTORS CORP.
  12. Rotate the balance shaft so that the timing mark on the balance shaft driven gear is in the 6 o'clock position.
    13. Fig 8: Aligning Balance Shaft Drive Gear & Balance Shaft Driven Gear Timing Marks
    GM5144Courtesy of GENERAL MOTORS CORP.
  13. Position the balance shaft drive gear onto the engine camshaft.
  14. Look to ensure that the balance shaft drive gear and the balance shaft driven gear timing marks are aligned.
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