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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 809 (Engine Exhaust System) >> Repair Instructions >> Exhaust Manifold Replacement - Right (8.1L Engine) >> Removal Procedure

Removal Procedure

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  1. Remove the wheelhouse panel. Refer to WHEELHOUSE PANEL REPLACEMENT in Body Front End.
  2. Remove the oil level indicator tube.

    Important:  Twist the spark plug boot one-half turn in order to release the boot. Pull on the spark plug boot only. Do not pull on the spark plug or the wire could be damaged.

  3. Remove the spark plug wires from the spark plugs and ignition coils.
    4. Fig 1: Removing Spark Plug Wires From Spark Plugs And Ignition Coils
    G02119404Courtesy of GENERAL MOTORS CORP.
  4. Remove the engine coolant temperature (ECT) sensor.
    5. Fig 2: Removing Engine Coolant Temperature (ECT) Sensor
    G02119405Courtesy of GENERAL MOTORS CORP.
  5. Remove the spark plugs. Refer to SPARK PLUGS in Engine Controls -8.1L.
  6. Remove the exhaust gas recirculation (EGR) pipe nuts (5) from the exhaust manifold.
    7. Fig 3: Removing Exhaust Gas Recirculation (EGR) Pipe, Bolt And Nuts
    G02119406Courtesy of GENERAL MOTORS CORP.
  7. Remove the EGR pipe bracket bolt (4).
  8. Remove and discard the EGR pipe gasket.
  9. Reposition the EGR pipe (2).
  10. Raise and suitably support the vehicle. Refer to LIFTING AND JACKING THE VEHICLE in General Information.
  11. Remove the exhaust manifold heat shield bolts and nuts.
    12. Fig 4: Removing Exhaust Manifold Heat Shield Bolts And Nuts
    G02119407Courtesy of GENERAL MOTORS CORP.
  12. Remove the exhaust manifold heat shield.
  13. Lower the vehicle.
  14. Remove the exhaust manifold bolt and nuts.
    15. Fig 5: Removing Exhaust Manifold Bolt And Nuts
    G02119408Courtesy of GENERAL MOTORS CORP.
  15. Remove the exhaust manifold.
  16. Remove and discard the exhaust manifold gasket.
  17. Clean and inspect the exhaust manifold, if the manifold is not being replaced.
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