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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 1443 (Engine Mechanical - 4.2L (Ll8)) >> Repair Instructions >> On-Vehicle Repair Instructions >> Camshaft Replacement >> Installation Procedure

Installation Procedure

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  1. Coat the camshaft journals, camshaft journal thrust face, and camshaft lobes with clean engine oil.
    2. Fig 1: Identifying Camshafts
    GM637768Courtesy of GENERAL MOTORS CORP.
  2. Install the intake and exhaust camshafts to their original positions.
  3. Install the J 44221  with the camshaft flats up and the number 1 cylinder at top dead center. See Special Tools and Equipment .
    4. Fig 2: Installing Camshaft Retainer Caps
    GM637767Courtesy of GENERAL MOTORS CORP.
    NOTE: Refer to Fastener Notice in Cautions and Notices.
    IMPORTANT: Install the camshaft caps onto their original locations. The camshaft caps are pin stamped for direction and numerical order.
  4. Install the camshaft caps and bolts.

    Tighten:  Tighten the camshaft cap bolts to 12 N.m (106 lb in).

  5. Remove the J 44221  . See Special Tools and Equipment .
    6. Fig 3: View Of J 44222 Installed Onto Cylinder Head
    GM760724Courtesy of GENERAL MOTORS CORP.
  6. Carefully move the sprockets back onto the camshafts and remove the J 44222  . See Special Tools and Equipment .
  7. Install the intake camshaft sprocket washer and bolt, and the exhaust camshaft actuator bolt.

    Tighten: 

    • Tighten the intake camshaft sprocket bolt the first pass to 20 N.m (15 lb ft).
    • Use the J 36660-A to tighten the intake camshaft sprocket bolt the final pass an additional 100 degrees.
    • Tighten the exhaust camshaft actuator bolt the first pass to 25 N.m (18 lb ft).
    • Use the J 36660-A to tighten the exhaust camshaft actuator bolt a final pass an additional 135 degrees.

  8. Install the camshaft cover. Refer to Camshaft Cover Replacement  .
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