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Installation Procedure

WARNING: This page is about a different car, the 2002 Buick Regal and 2002 Buick Century. However, it is still accessible from the selected car via links, so may be relevant.
  1. Install the heated oxygen sensor (HO2S). Refer to HEATED OXYGEN SENSOR
    2. Fig 1: Heated Oxygen Sensor (HO2S)
    G01766108Courtesy of GENERAL MOTORS CORP.
  2. Install a new exhaust manifold pipe gasket to the exhaust manifold pipe studs.
  3. Install and support the 3-way catalytic converter.
  4. Install the exhaust manifold pipe stud nuts.

    Tighten 

    Tighten the nuts to 35 N.m (26 lb ft).

    Fig 2: Exhaust Manifold Pipe Gasket To The Exhaust Manifold Pipe Studs
    G01766109Courtesy of GENERAL MOTORS CORP.
  5. Install the catalytic converter gasket.
  6. Install the catalytic converter bolts.

    Tighten 

    Tighten the bolts to 45 N.m (33 lb ft).

    Fig 3: Catalytic Converter Gasket And Bolts
    G01766110Courtesy of GENERAL MOTORS CORP.
  7. Install the catalytic converter hangers.
  8. Connect the heated oxygen sensor (HO2S) electrical connector and retainers. Refer to HEATED OXYGEN SENSOR
  9. Remove the support from the exhaust system.
  10. Inspect the exhaust system for leaks and underbody contact.
  11. Lower the vehicle.
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