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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 1318 (Engine Exhaust System) >> Repair Instructions >> Catalytic Converter Replacement (3.1L) >> Installation Procedure

Installation Procedure

WARNING: This page is about a different car, the 2002 Pontiac Grand Prix. However, it is still accessible from the selected car via links, so may be relevant.
  1. Install the heated oxygen (HO2S) sensor. Refer to HEATED OXYGEN SENSOR .
    Fig 1: Heated Oxygen (HO2S) Sensor
    G01704095Courtesy of GENERAL MOTORS CORP.
  2. Install a new exhaust manifold pipe gasket.
    Fig 2: Exhaust Manifold Pipe Gasket
    G01704096Courtesy 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 three way catalytic converter.
    NOTE: Refer to FASTENER NOTICE .
  4. Install the exhaust manifold pipe stud nuts.

    Tighten 

    Tighten the exhaust manifold pipe stud nuts to 35 N.m (26 lb ft).

    Fig 3: Exhaust Manifold Pipe Stud Nuts
    G01704097Courtesy of GENERAL MOTORS CORP.
  5. Install the catalytic converter gasket.
  6. Install the catalytic converter bolts.

    Tighten 

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

  7. Remove the support from the exhaust system.
  8. Connect the heated oxygen (HO2S) sensor wiring harness connector and retainers.
  9. Inspect the exhaust system for leaks and underbody contact.
  10. Lower the vehicle.
    Fig 4: Catalytic Converter Gasket & Bolts
    G01704098Courtesy of GENERAL MOTORS CORP.
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