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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 257 (Engine Mechanical - 4.0L (On-Vehicle)) >> Repair Instructions >> Camshaft Cover Replacement - Left >> Removal Procedure

Removal Procedure

WARNING: This page is about a different car, the 2002 Oldsmobile Aurora. However, it is still accessible from the selected car via links, so may be relevant.
  1. Remove the 2 nuts (2) from the intake manifold sight shield (1).
  2. Remove the sight shield (1) from the engine.
    3. Fig 1: Removing Fuel Injector Sight Shield
    G01819292Courtesy of GENERAL MOTORS CORP.
  3. Partially drain the cooling system. Refer to DRAINING AND FILLING COOLING SYSTEM .
  4. Position the J 38185  (2) to the clamp in order to remove the radiator inlet hose (1) from the water housing crossover.
    Fig 2: Removing Radiator Inlet Hose
    G01819293Courtesy of GENERAL MOTORS CORP.
  5. Disconnect the PCV fresh air tube (1) from the camshaft cover.
    6. Fig 3: Disconnecting PCV Fresh Air Tube
    G01819294Courtesy of GENERAL MOTORS CORP.
  6. Remove the Ignition coil cassette. Refer to IGNITION CONTROL MODULE .
  7. Remove the 4 spark plug boots.
    Fig 4: Removing Spark Plug Boots
    G01819295Courtesy of GENERAL MOTORS CORP.
  8. Disconnect the cable harness clips at the front of the camshaft cover and position the cable harness aside.
  9. Remove the secondary AIR valve bracket nut closest to the center of the engine.
  10. Pry outward slightly on the secondary AIR valve bracket in order to gain clearance to remove the water pump drive belt shield nut.
  11. Remove the water pump drive belt shield fasteners.
  12. Remove the water pump drive belt shield.
  13. Disconnect the water pump drive belt.
    Fig 5: Removing Water Pump Drive Belt Shield
    G01819296Courtesy of GENERAL MOTORS CORP.
  14. Loosen the 2 bolts (3) attaching the water pump belt tensioner (1) to the water crossover.
  15. Remove the water pump belt tensioner (1).
    Fig 6: Removing Water Pump Belt Tensioner
    G01819297Courtesy of GENERAL MOTORS CORP.
  16. Remove the plastic dust cap from the end of the intake camshaft.
    Fig 7: Removing Intake Camshaft Plastic Dust Cap
    G01819298Courtesy of GENERAL MOTORS CORP.
  17. Remove the water pump drive pulley from the intake camshaft using the J 38825. 
    Fig 8: Removing Water Pump Drive Pulley
    G01819299Courtesy of GENERAL MOTORS CORP.
  18. Remove the 3 camshaft seal retainer bolts.
    Fig 9: Removing Camshaft Seal Retainer Bolts
    G01819300Courtesy of GENERAL MOTORS CORP.

    Important:  DO NOT reuse the camshaft seal.

  19. Remove the camshaft seal.
    Fig 10: Removing Camshaft Seal
    G01819301Courtesy of GENERAL MOTORS CORP.
  20. Remove the 9 camshaft cover bolts.
    Fig 11: Removing Camshaft Cover Bolts
    G01819302Courtesy of GENERAL MOTORS CORP.
  21. Lift the camshaft drive end of the camshaft cover up.
    Fig 12: Lifting Camshaft Drive End Of Camshaft Cover Up
    G01819303Courtesy of GENERAL MOTORS CORP.
  22. Remove the camshaft cover reward to clear the water pump drive shaft.
    23. Fig 13: Removing Camshaft Cover Reward
    G01819304Courtesy of GENERAL MOTORS CORP.
  23. Discard the camshaft cover perimeter seals and spark plug seals if there is any evidence of damage or if the seal comes out of the groove in the cover during removal.
  24. Clean and inspect the camshaft cover. Refer to CAMSHAFT COVER CLEANING AND INSPECTION .
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