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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 602 (Engine Exhaust System) >> Repair Instructions >> Catalytic Converter Replacement (3.1 L) >> Installation Procedure

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
    Fig 1: Heated Oxygen Sensor (HO2S)
    G01766099Courtesy of GENERAL MOTORS CORP.
  2. Install a new exhaust manifold pipe gasket.
    Fig 2: Exhaust Manifold Pipe Gasket
    G01766100Courtesy of GENERAL MOTORS CORP.
    NOTE: To prevent internal damage to the flexible coupling of the catalytic converter assembly, the converter must be supported. The vertical movement at the rear of the catalytic converter assembly must not exceed 6 degrees up or down.
  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 3: Exhaust Manifold Pipe Stud Nuts
    G01766101Courtesy 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 4: Catalytic Converter Bolts
    G01766102Courtesy of GENERAL MOTORS CORP.
  7. Install the catalytic converter hangers.
    8. Fig 5: Catalytic Converter Hangers And Gaskets
    G01766103Courtesy of GENERAL MOTORS CORP.
  8. Remove the support from the exhaust system.
  9. Connect the heated oxygen sensor (HO2S) electrical connector and retainers. Refer to HEATED OXYGEN SENSOR
  10. Inspect the exhaust system for leaks and underbody contact.
  11. Lower the vehicle.
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