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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 909 (Engine Exhaust System) >> Repair Instructions >> Exhaust Manifold Replacement >> Removal Procedure

Removal Procedure

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.
  1. Disconnect the battery negative cable. Refer to BATTERY NEGATIVE CABLE DISCONNECT/CONNECT PROCEDURE in Battery.
  2. Raise the vehicle. Refer to JACKING AND LIFTING in General Information.
  3. Remove the exhaust pipe from the exhaust manifold. Refer to Exhaust Manifold Pipe Replacement  .
  4. Lower the vehicle.
  5. Remove the upper fan shroud. Refer to FAN SHROUD REPLACEMENT in Engine Cooling.
  6. Remove the drive belt. Refer to DRIVE BELT REPLACEMENT .

    Important:  Do not evacuate the air conditioning system.

    Fig 1: Removing Exhaust Pipe From Exhaust Manifold
    G01979380Courtesy of GENERAL MOTORS CORP.
  7. Remove the air conditioning compressor, if equipped, and set it aside. Refer to COMPRESSOR REPLACEMENT (2.2L) or COMPRESSOR REPLACEMENT (4.3L) in Heating, Ventilation and Air Conditioning.
  8. Remove the power steering pump and set it aside, using the following procedure:
    1. 8.1. Two nuts from the cylinder head studs
    2. 8.2. One bolt from the rear bracket
    3. 8.3. Three bolts from the front of the power steering pump

      The bolts are accessible through the holes in the power steering pump pulley.

  9. Remove the oil level indicator tube. Refer to OIL LEVEL INDICATOR AND TUBE REPLACEMENT .
  10. Disconnect the oxygen sensor electrical connection.
    Fig 2: Removing Exhaust Manifold
    G01979381Courtesy of GENERAL MOTORS CORP.
  11. Remove the oxygen sensor from the exhaust manifold to prevent damage to the sensor.
    Fig 3: Removing Oxygen Sensor From Exhaust Manifold
    G01979382Courtesy of GENERAL MOTORS CORP.
  12. Remove the air injection nuts (1,2).
  13. Remove the air injection pipe from the exhaust manifold.
    Fig 4: Removing Air Injection Pipe From Exhaust Manifold
    G01979383Courtesy of GENERAL MOTORS CORP.
  14. Remove the exhaust manifold nuts.
  15. Remove the exhaust manifold.
  16. Remove the exhaust manifold gasket.
    Fig 5: Removing Exhaust Manifold Nuts
    G01979384Courtesy of GENERAL MOTORS CORP.
  17. Remove the heat shield, if replacing the exhaust manifold.
  18. Clean all sealing surfaces. Refer to EXHAUST MANIFOLD CLEANING AND INSPECTION in Engine Mechanical - 2.2L.
    Fig 6: Removing Heat Shield
    G01979385Courtesy of GENERAL MOTORS CORP.
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