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Home >> Cadillac >> 2021 >> CT4 Sport, 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 47 (Exhaust System) >> Repair Instructions >> Warm Up Three-Way Catalytic Converter Replacement (L3B) >> Installation Procedure

Installation Procedure

WARNING: This page is about a different car, the 2022 Cadillac CT4. However, it is still accessible from the selected car via links, so may be relevant.
  1. GM5403768Courtesy of GENERAL MOTORS COMPANY

    Catalytic Converter Gasket (3) - Install NEW

  2. Exhaust Pipe Clamp (2) - Install NEW but do NOT tighten.
    3. NOTE:

    Ensure that the catalytic converter gasket is fully seated on the warm up three-way catalytic converter inlet flange.

  3. Warm Up Three-Way Catalytic Converter (1) - Install
  4. GM5442538Courtesy of GENERAL MOTORS COMPANY

    Catalytic Converter Brace (3) - Install

    5. CAUTION:

    Refer to Fastener Caution .

  5. Catalytic Converter Brace Bolt (2) - Install and tighten [2x] - Fastener Specifications 
  6. Catalytic Converter Brace Bracket Nut (1) - Install and tighten [2x] - Fastener Specifications 
  7. GM5403738Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    Inspect on all sides of the warm up three-way catalytic converter to verify it is fully seated prior to tightening the exhaust pipe clamp.

    Exhaust Pipe Clamp (1) - Tighten - Fastener Specifications 

  8. GM5399464Courtesy of GENERAL MOTORS COMPANY

    Front Crossmember Brace (2) - Install

  9. Front Crossmember Brace Nut (1) - Install and tighten [4x] - Fastener Specifications
  10. GM5394598Courtesy of GENERAL MOTORS COMPANY

    Catalytic Converter Gasket (2) - Install NEW

  11. Exhaust Muffler (1) - Install
  12. GM5309211Courtesy of GENERAL MOTORS COMPANY

    Exhaust Muffler (1) @ Exhaust Rear Muffler Insulator-Right Side (3) - Install

  13. Exhaust Muffler (1) @ Exhaust Intermediate Pipe Insulator-Right Side (2) - Install
  14. GM5309202Courtesy of GENERAL MOTORS COMPANY

    Exhaust Muffler (1) @ Exhaust Rear Muffler Insulator-Left Side (3) - Install

  15. Exhaust Muffler (1) @ Exhaust Intermediate Pipe Insulator-Left Side (2) - Install
  16. GM5394596Courtesy of GENERAL MOTORS COMPANY

    Electrical Connector (1) @ Exhaust Control Valve Actuator - Connect [2x]

  17. GM5309188Courtesy of GENERAL MOTORS COMPANY

    Catalytic Converter Nut (1) - Install and tighten [2x] - Fastener Specifications 

  18. GM5400756Courtesy of GENERAL MOTORS COMPANY

    Floor Panel Reinforcement (2) - Install

  19. Floor Panel Number 4 Cross Bar Reinforcement Bolt (1) - Install and tighten [6x] - Fastener Specifications
  20. GM5399124Courtesy of GENERAL MOTORS COMPANY
    CAUTION:

    Refer to Component Fastener Tightening Caution .

    NOTE:

    A special anti-seize compound is used on the heated oxygen sensor threads. The compound consists of liquid graphite and glass beads. The graphite will burn away, but the glass beads will remain, making the sensor easier to remove. New or service sensors will have the compound already applied to the threads. IF a sensor is removed and is to be reinstalled, the threads MUST have an anti-seize compound applied before installation. Adhesives, Fluids, Lubricants, and Sealers

    Using the appropriate tool, install the heated oxygen sensor (1). Fastener Specifications

  21. Connect the electrical connector.
  22. GM5395459Courtesy of GENERAL MOTORS COMPANY

    Turbocharger Heat Shield (1) - Install

  23. GM5395458Courtesy of GENERAL MOTORS COMPANY

    Turbocharger Heat Shield Bolt (1) - Install and tighten [2x] - Fastener Specifications 

  24. GM5395457Courtesy of GENERAL MOTORS COMPANY

    Turbocharger Heat Shield Bolt (1) - Install and tighten [2x] - Fastener Specifications 

  25. GM5399121Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    A special anti-seize compound is used on the heated oxygen sensor threads. The compound consists of liquid graphite and glass beads. The graphite will burn away, but the glass beads will remain, making the sensor easier to remove. New or service sensors will have the compound already applied to the threads. IF a sensor is removed and is to be reinstalled, the threads MUST have an anti-seize compound applied before installation. Adhesives, Fluids, Lubricants, and Sealers

    Using the appropriate tool, install the heated oxygen sensor (1). Fastener Specifications

  26. Connect the electrical connector.
  27. GM5399073Courtesy of GENERAL MOTORS COMPANY

    Air Cleaner Assembly (1) - Install

  28. GM5399053Courtesy of GENERAL MOTORS COMPANY

    Air Cleaner Bolt (1) - Install and tighten - Fastener Specifications

  29. Connect the electrical connector and install all wiring harnesses to the air cleaner assembly.
  30. GM5398967Courtesy of GENERAL MOTORS COMPANY

    Air Cleaner Outlet Duct (1) - Install

  31. Connect the electrical connector.
  32. GM5398955Courtesy of GENERAL MOTORS COMPANY

    Positive Crankcase Ventilation Tube (3) - Connect - Plastic Collar Quick Connect Fitting Service

  33. Evaporative Emission Canister Purge Tube (2) - Connect - Plastic Collar Quick Connect Fitting Service
  34. Air Cleaner Outlet Duct Clamp (1) - Tighten [2x] - Fastener Specifications
  35. GM5432174Courtesy of GENERAL MOTORS COMPANY

    Intake Manifold Cover (1) @ Upper Intake Manifold Bracket (2) - Install

  36. GM5432171Courtesy of GENERAL MOTORS COMPANY

    Push down on the front of the intake manifold cover (2).

  37. Intake Manifold Cover Bolt (1) - Install and tighten [2x] - Fastener Specifications
  38. Install the oil fill cap.
  39. Inspect the exhaust system for leaks.
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