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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 855 (Engine Mechanical - 4.8L, 5.3L & 6.0L) >> Repair Instructions >> On-Vehicle Repair Instructions >> Camshaft Replacement >> Removal Procedure

Removal Procedure

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  1. Raise the hood to the service position, perform the following:
    • Remove the hood hinge bolts (1).
    • Raise the hood until vertical.
    • Install the hood hinge bolts until snug in the service position (2).
  2. Remove the radiator support. Refer to RADIATOR SUPPORT REPLACEMENT in BODY FRONT END.
  3. Remove the front cover. Refer to Engine Front Cover Replacement  .
  4. Remove the valve lifters. Refer to Valve Lifter Replacement  .
    Fig 1: Removing Hood Hinge & Bolts
    G02116517Courtesy of GENERAL MOTORS CORP.
  5. Remove the camshaft sensor bolt and sensor.
    Fig 2: Removing Camshaft Sensor Bolt & Sensor
    G02116518Courtesy of GENERAL MOTORS CORP.
  6. Rotate the crankshaft until the timing marks on the crankshaft and camshaft sprockets are aligned.
    Fig 3: Rotating Crankshaft Until Timing Marks On Crankshaft & Camshaft Sprockets Are Aligned
    G02116519Courtesy of GENERAL MOTORS CORP.
  7. Remove the camshaft sprocket bolts.
    NOTE: Do not turn the crankshaft assembly after the timing chain has been removed in order to prevent damage to the piston assemblies or the valves.
  8. Remove the camshaft sprocket and reposition the timing chain.
    Fig 4: Removing Camshaft Sprocket Bolts
    G02116520Courtesy of GENERAL MOTORS CORP.
  9. Remove the camshaft retainer bolts and retainer.
    Fig 5: Removing Camshaft Retainer Bolts & Retainer
    G02116521Courtesy of GENERAL MOTORS CORP.
    NOTE: All camshaft journals are the same diameter, so care must be used in removing or installing the camshaft to avoid damage to the camshaft bearings.
  10. Remove the camshaft.
    1. 10.1. Install three M8-1.25 x 100 mm (M8-1.25 x 4.0 in) bolts to the bolt holes in the front of the camshaft.
    2. 10.2. Using the bolts as a handle, carefully rotate and pull the camshaft out of the engine block.
    3. 10.3. Remove the three bolts from the camshaft.
  11. If required, clean and inspect the camshaft and bearings. Refer to CAMSHAFT AND BEARINGS CLEANING AND INSPECTION  .
    Fig 6: Removing Bolts From Camshaft
    G02116522Courtesy of GENERAL MOTORS CORP.
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