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Home >> Buick >> 2007 >> Allure CX >> Repair and Diagnosis >> External Pages >> Different car >> Section 51 (Engine Exhaust System) >> Repair Instructions >> Exhaust Manifold Replacement - Right Side (3.8L) >> Removal Procedure

Removal Procedure

WARNING: This page is about a different car, the 2008 Buick LaCrosse and 2008 Buick Allure. However, it is still accessible from the selected car via links, so may be relevant.
    Fig 1: View Of Right Exhaust Crossover Heat Shield
    GM910984Courtesy of GENERAL MOTORS CORP.
  1. Remove the fuel injector sight shield. Refer to Fuel Injector Sight Shield Replacement .
  2. Remove the exhaust crossover heat shield nuts (1).
  3. Remove the exhaust crossover heat shield (2).
    4. Fig 2: View Of Exhaust Crossover Pipe
    GM911162Courtesy of GENERAL MOTORS CORP.
  4. Remove the exhaust crossover pipe studs (3) from the right exhaust manifold.
  5. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle .
    6. Fig 3: View Of Right Exhaust Manifold & Catalytic Converter Pipe
    GM911163Courtesy of GENERAL MOTORS CORP.
  6. Remove the exhaust manifold pipe stud nuts (2) and the catalytic converter pipe (3) from the right exhaust manifold.
  7. Lower the vehicle.
  8. Rotate the engine to access the right side of the engine. Refer to Rotating the Engine for Service Access .
    9. Fig 4: View Of HO2S Electrical Connector & Right Exhaust Manifold
    GM911055Courtesy of GENERAL MOTORS CORP.
  9. Disconnect the heated oxygen sensor (HO2S) electrical connector (1).
  10. Remove the HO2S electrical connector (1) from the engine sight shield bracket.
  11. Remove the HO2S (2) from the right exhaust manifold. Refer to Heated Oxygen Sensor 1 Replacement .
  12. Remove the right side spark plugs from cylinders 2, 4 and 6. Refer to Spark Plug Replacement .
    13. Fig 5: Identifying Fuel Injector Sight Shield Bracket & Nuts
    GM911011Courtesy of GENERAL MOTORS CORP.
  13. Remove the fuel injector sight shield bracket nuts (2).
  14. Remove the fuel injector sight shield bracket (1).
    15. Fig 6: Identifying Right Engine Lift Bracket Bolt & Nut
    GM910986Courtesy of GENERAL MOTORS CORP.
  15. Remove the right engine lift bracket bolt (2) and the nut (3).
  16. Remove the right engine lift bracket (1).
    17. Fig 7: Identifying Right Exhaust Manifold Heat Shield & Bolts
    GM911016Courtesy of GENERAL MOTORS CORP.
  17. Remove the right exhaust manifold heat shield bolts (2).
  18. Remove the right exhaust manifold heat shield (1).
  19. Raise the vehicle.
    20. Fig 8: Identifying EGR Valve Adapter Bolt & Right Exhaust Manifold
    GM911025Courtesy of GENERAL MOTORS CORP.
  20. Remove the exhaust gas recirculation (EGR) valve inlet adapter pipe bolt (1) from the right exhaust manifold.
  21. Lower the vehicle.
    22. Fig 9: Right Exhaust Manifold Gasket
    GM910980Courtesy of GENERAL MOTORS CORP.
  22. Remove the right exhaust manifold studs (4) and the nuts (3).
  23. Remove the right exhaust manifold (2).
  24. Remove the right exhaust manifold gasket (1).
    25. Fig 10: Locating Exhaust Manifold Studs
    GM305693Courtesy of GENERAL MOTORS CORP.
  25. Remove the exhaust manifold studs if damaged.
  26. Clean and Inspect the right exhaust manifold. Refer to Exhaust Manifold Cleaning and Inspection .
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