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Home >> Pontiac >> 2003 >> Aztek AWD >> Repair and Diagnosis >> Engine Mechanical >> Engine Exhaust System >> Repair Instructions >> Exhaust Manifold Replacement - Right >> Removal Procedure

Removal Procedure

  1. Disconnect negative battery cable.
  2. Remove the throttle body air inlet duct.
  3. Remove the accelerator cable bracket from the throttle body.
  4. Remove the manifold air pressure (MAP) sensor.
  5. Remove the exhaust gas recirculation (EGR) valve.
    Fig 1: Removing Right Upper And Lower Exhaust Manifold Heat Shields
    G01501617Courtesy of GENERAL MOTORS CORP.
  6. Rotate the engine for service access. Refer to ROTATING THE ENGINE FOR SERVICE ACCESS .
  7. Remove the ignition module and the ignition coils with the bracket.
  8. Remove the spark plug wires from the engine right bank spark plugs.
  9. Disconnect the oxygen sensor electrical connector.
  10. Remove the evaporative emissions (EVAP) solenoid bracket.
  11. Remove the exhaust crossover pipe. Refer to EXHAUST CROSSOVER PIPE REPLACEMENT  .
  12. Raise and support the vehicle.
  13. Remove the catalytic converter. Refer to CATALYTIC CONVERTER REPLACEMENT  .
  14. Remove the exhaust manifold heat shield bolts.
  15. Remove the exhaust manifold heat shields.
  16. Remove the exhaust manifold nuts.
  17. Remove the exhaust manifold.
  18. Remove the exhaust manifold gasket.
  19. Lower the vehicle.
  20. Clean the engine right side exhaust manifold sealing surfaces and the cylinder head sealing surfaces. Refer to EXHAUST MANIFOLD CLEANING AND INSPECTION .
  21. If you are REPLACING the engine right side exhaust manifold, remove the exhaust gas recirculation (EGR) valve pipe.
  22. If you are REPLACING the engine right side exhaust manifold, remove the Heated Oxygen Sensor (HO2S).
    Fig 2: Removing Right Exhaust Manifold And Gasket
    G01501618Courtesy of GENERAL MOTORS CORP.
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