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Home › Buick › 2005 › Century Base › Repair and Diagnosis › Engine Mechanical › Engine Exhaust System › Repair Instructions › Exhaust Manifold Replacement - Right › Installation Procedure

Installation Procedure

    Fig 1: View Of Heated Oxygen (HO2S) Sensor
    GM190526Courtesy of GENERAL MOTORS CORP.
  1. If replacing the right exhaust manifold install the HO2S. Refer to Heated Oxygen Sensor Replacement - Position 1 in Engine Controls - 3.1L.
    2. Fig 2: View Of Exhaust Manifold
    GM61923Courtesy of GENERAL MOTORS CORP.
  2. Install the right exhaust manifold gasket.
  3. Install the right exhaust manifold.
    4. NOTE: Refer to Fastener Notice in Cautions and Notices.
  4. Install the right exhaust manifold nuts.

    Tighten:  Tighten the nuts to 16 N.m (12 lb ft).

    5. Fig 3: View Of Exhaust Manifold Lower Heat Shield
    GM61831Courtesy of GENERAL MOTORS CORP.
  5. Install the right exhaust manifold lower heat shield.
  6. Install the right exhaust manifold lower heat shield bolts.

    Tighten:  Tighten the bolts to 10 N.m (89 lb in).

    7. Fig 4: View Of Exhaust Manifold Upper Heat Shield
    GM61830Courtesy of GENERAL MOTORS CORP.
  7. Install the right exhaust manifold upper heat shield.
  8. Install the right exhaust manifold upper heat shield bolts.

    Tighten:  Tighten the bolts to 10 N.m (89 lb in).

  9. Install the EGR pipe to the right exhaust manifold. Refer to Exhaust Gas Recirculation (EGR) Pipe Replacement in Engine Controls - 3.1L.
  10. Install the catalytic converter. Refer to Catalytic Converter Replacement (3.1L) .
  11. Lower the vehicle.
    12. Fig 5: Locating Exhaust Crossover Pipe Nuts
    GM190525Courtesy of GENERAL MOTORS CORP.
  12. Install the exhaust crossover pipe nuts to the right exhaust manifold.

    Tighten:  Tighten the nuts to 25 N.m (18 lb ft).

    13. Fig 6: View Of Exhaust Crossover Pipe Heat Shield
    GM190524Courtesy of GENERAL MOTORS CORP.
  13. Install the exhaust crossover pipe heat shield.
  14. Install the exhaust crossover pipe heat shield bolts.

    Tighten:  Tighten the bolts to 10 N.m (89 lb in).

  15. Install the thermostat bypass pipe. Refer to Thermostat Bypass Pipes Replacement in Engine Cooling.
    16. Fig 7: Identifying HO2S Electrical Connector
    GM73896Courtesy of GENERAL MOTORS CORP.
  16. Connect the HO2S electrical connector.
  17. Install the ignition control module and the ignition control module bracket. Refer to Ignition Control Module Replacement in Engine Controls - 3.1L.
  18. Install the MAP sensor. Refer to Manifold Absolute Pressure (MAP) Sensor Replacement in Engine Controls - 3.1L.
  19. Return the engine to the original position.
  20. Install the engine mount struts. Refer to Engine Mount Strut Replacement in Engine Mechanical - 3.1L.
  21. Install the accelerator and cruise control cables with the bracket to the throttle body. Refer to Accelerator Controls Cable Bracket Replacement in Engine Controls - 3.1L.
  22. Install the air cleaner intake duct. Refer to Air Cleaner Intake Duct Replacement in Engine Controls - 3.1L.
  23. Connect the negative battery cable. Refer to Battery Negative Cable Disconnect/Connect Procedure in Engine Electrical.
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