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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 1618 (Engine Mechanical - 4.3L) >> Repair Instructions >> Off-Vehicle Repair Instructions >> Camshaft Bearing Installation >> Tools Required

Tools Required

WARNING: This page is about a different car, the 2003 GMC Sierra and 2003 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.

J 33049  Camshaft Bearing Service Kit

IMPORTANT: When installing the camshaft bearings, always look in order to ensure that the camshaft bearing lubrication hole is located above the 3 o'clock position (1) or the 9 o'clock position (2). The proper positioning of the camshaft bearing lubrication hole is in order to ensure the best lubrication of the engine camshaft journals.
Fig 1: Positions Of Camshaft Bearing Lubrication Hole
G02106266Courtesy of GENERAL MOTORS CORP.
  1. Assemble the J 33049  handle (10), the expanding driver (4-8), the washer (2 or 3), and the expander assembly (15).
    Fig 2: Identifying Camshaft Bearing Service Kit
    G02106267Courtesy of GENERAL MOTORS CORP.
    CAUTION: Refer to SAFETY GLASSES CAUTION .
    IMPORTANT: The camshaft bearings vary in size. When ordering the new camshaft bearings, be sure to order the correct camshaft bearings for the application to be serviced.

    Always install the camshaft outer bearings #1 and #4 first. The camshaft outer bearings serve as a guide for the J 33049  and help center the camshaft inner bearings during the installation process.

  2. Install the NEW camshaft outer bearings #4 and #1.
    1. 2.1. Install the NEW camshaft outer bearing #4 onto the J 33049  expander assembly.
    2. 2.2. Tighten the J 33049  expander assembly nut until snug.
    3. 2.3. Align the lubrication hole of the camshaft outer bearing #4 above the 3 o'clock position or the 9 o'clock position of the camshaft outer bearing bore #4 at the rear of the engine block.
      Fig 3: J 33049 (Camshaft Bearing Service Kit)
      G02106268Courtesy of GENERAL MOTORS CORP.
    4. 2.4. Drive the camshaft outer bearing #4 into the camshaft outer bearing bore #4 at the rear of the engine block.
    5. 2.5. Loosen the J 33049  expander assembly nut.
    6. 2.6. Remove the camshaft outer bearing #4 from the J 33049  expander assembly.
    7. 2.7. Install the NEW camshaft outer bearing #1 onto the J 33049  expander assembly.
    8. 2.8. Tighten the J 33049  expander assembly nut until snug.
    9. 2.9. Align the lubrication hole of the camshaft outer bearing #1 above the 3 o'clock position or the 9 o'clock position of the camshaft outer bearing bore #1 at the front of the engine block.
    10. 2.10. Drive the camshaft outer bearing #1 into the camshaft outer bearing bore #1 at the front of the engine block.
    11. 2.11. Loosen the J 33049  expander assembly nut.
    12. 2.12. Carefully slide the J 33049  into the engine block until the J 33049  expander assembly is positioned between the camshaft inner bearing bores.
  3. Install the NEW camshaft inner bearings #3 and #2.
    1. 3.1. Install the NEW camshaft inner bearing #3 onto the J 33049  expander assembly.
    2. 3.2. Tighten the J 33049  expander assembly nut until snug.
    3. 3.3. Align the lubrication hole of the camshaft inner bearing #3 above the 3 o'clock position or the 9 o'clock position of the camshaft inner bearing bore #3 of the engine block.
    4. 3.4. Push the J 33049  guide cone into the camshaft front bearing bore #1 in order to align the J 33049  .
    5. 3.5. Drive the camshaft inner bearing #3 into the camshaft inner bearing bore #3.
    6. 3.6. Loosen the J 33049  expander assembly nut.
    7. 3.7. Carefully slide the J 33049  until the J 33049  expander assembly is positioned between the camshaft inner bearing bore #2 and the camshaft outer bearing bore #1.
    8. 3.8. Install the NEW camshaft inner bearing #2 onto the J 33049  expander assembly.
    9. 3.9. Tighten the J 33049  expander assembly nut until snug.
    10. 3.10. Align the lubrication hole of the camshaft inner bearing #2 above the 3 o'clock position or the 9 o'clock position of the camshaft inner bearing bore #2 of the engine block.
    11. 3.11. Push the J 33049  guide cone into the camshaft front bearing bore #1 in order to align the J 33049  .
    12. 3.12. Drive the camshaft inner bearing #2 into the camshaft inner bearing bore #2.
    13. 3.13. Loosen the J 33049  expander assembly nut.
  4. Carefully remove the J 33049  from the engine block.
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