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Home >> Buick >> 2015 >> Regal GS, AWD >> Repair and Diagnosis >> Engine Mechanical >> Engine Exhaust System >> Repair Instructions >> Catalytic Converter Replacement (LTG) >> Removal Procedure

Removal Procedure

WARNING:

Refer to Exhaust Service Warning .

WARNING:

Refer to Protective Goggles and Glove Warning .

  1. Disconnect the heated oxygen sensor - 1. Refer to Heated Oxygen Sensor Replacement - Sensor 1 .
  2. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle .
    3. Fig 1: Fasteners And Exhaust Front Pipe
    GM2859624Courtesy of GENERAL MOTORS COMPANY
  3. Remove the 3 fasteners (1) securing the exhaust front pipe (2) to the catalytic converter.
  4. Heated Oxygen Sensor Replacement - Sensor 2 »Remove
    5. Fig 2: Catalytic Converter Brace Fasteners
    GM2859626Courtesy of GENERAL MOTORS COMPANY
  5. Remove the catalytic converter bracket fasteners (1) and remove the catalytic converter bracket (3).
  6. Lower the vehicle.
    7. Fig 3: Catalytic Converter Brace Bracket Fastener
    GM2859623Courtesy of GENERAL MOTORS COMPANY
  7. Remove the catalytic converter brace bracket fasteners (1).
  8. Remove the catalytic converter brace bracket (2) securing the catalytic converter to the engine block.
    9. Fig 4: Fasteners And Catalytic Converter
    GM2859621Courtesy of GENERAL MOTORS COMPANY
  9. Remove the 4 fasteners (3) securing the catalytic converter (1) to the turbocharger.
  10. Inspect the exhaust manifold studs (2) for damage and replace as necessary.
    11. Fig 5: Catalytic Converter
    GM2859628Courtesy of GENERAL MOTORS COMPANY
  11. Remove the catalytic converter (3) from the engine compartment.
  12. Discard the turbocharger seal (2) and the exhaust front pipe gasket (1).
  13. If replacing the catalytic converter, transfer the catalytic converter brace to the NEW catalytic converter.
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