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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 >> Off-Vehicle Repair Instructions >> Camshaft Bearing Removal

Camshaft Bearing Removal

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.

Tools Required 

J 33049  Camshaft Bearing Service Kit

  1. Select the cone (1), the handle (10), the expanding driver (4-8), the washer (2 or 3), and the expander assembly (15) from the J 33049  .
  2. Assemble the J 33049 
    Fig 1: View of J 33049 Components
    G01977862Courtesy of GENERAL MOTORS CORP.
    CAUTION: Refer to SAFETY GLASSES CAUTION in Cautions and Notices.

    Important: 

    • A loose camshaft bearing may be caused by an enlarged, out-of-round, or damaged engine block camshaft bearing bore.
    • Always remove the camshaft inner bearings #2 and #3 first. The camshaft outer bearings #1 and #4 serve as a guide for the J 33049  .
  3. Remove the camshaft inner bearings #2 and #3.
    1. 3.1. Insert the J 33049  through the front of the engine block and into the camshaft inner bearing #2.
    2. 3.2. Tighten the J 33049  expander assembly nut until snug.
    3. 3.3. Push the J 33049  guide cone into the camshaft front bearing in order to align the J 33049  .
      Fig 2: J 33049
      G01977863Courtesy of GENERAL MOTORS CORP.
    4. 3.4. Drive the camshaft inner bearing #2 from the camshaft inner bearing bore #2.
    5. 3.5. Loosen the J 33049  expander assembly nut.
    6. 3.6. Remove the camshaft inner bearing #2 from the J 33049  expander assembly.
    7. 3.7. Insert the J 33049  expander assembly into the camshaft inner bearing #3.
    8. 3.8. Tighten the J 33049  expander assembly nut until snug,
    9. 3.9. Push the J 33049  guide cone into the camshaft front bearing in order to align the J 33049  .
    10. 3.10. Drive the camshaft inner bearing #3 from the camshaft inner bearing bore #3.
    11. 3.11. Loosen the J 33049  expander assembly nut.
    12. 3.12. Remove the camshaft inner bearing #3 from the J 33049  expander assembly.
  4. Remove the J 33049  from the engine block.
  5. Remove the camshaft outer bearings #1 and #4
    1. 5.1. Insert the J 33049  into the camshaft outer bearing #1.
    2. 5.2. Tighten the J 33049  expander assembly nut until snug.
    3. 5.3. Drive the camshaft outer bearing #1 from the camshaft outer bearing bore #1.
    4. 5.4. Loosen the J 33049  expander assembly nut.
    5. 5.5. Remove the camshaft outer bearing #1 from the J 33049  expander assembly.
    6. 5.6. Remove the J 33049  from the engine block.
    7. 5.7. Insert the J 33049  into the camshaft outer bearing #4.
    8. 5.8. Tighten the J 33049  expander assembly nut until snug.
    9. 5.9. Drive the camshaft outer bearing #4 from the camshaft outer bearing bore #4.
    10. 5.10. Loosen the J 33049  expander assembly nut.
    11. 5.11. Remove the camshaft outer bearing #4 from the J 33049  expander assembly.
  6. Remove the J 33049  from the engine block.
  7. Discard the camshaft bearings.
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