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Home >> Cadillac >> 2019 >> CTS Base, AWD >> Repair and Diagnosis >> Engine Mechanical >> Exhaust System >> Repair Instructions >> Catalytic Converter Replacement (LTG) >> Installation Procedure
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Installation Procedure

  1. Inspect the anti-rotation tab of the lower brace bracket (2) to ensure that the tab is flush with the oil pan rib.
    GM4620920Courtesy of GENERAL MOTORS COMPANY
  2. CAUTION:

    Refer to Fastener Caution .

  3. If the brace bracket has been removed or adjustment is required, position the bracket and tighten the bolt (1) to 22 N.m (16 lb ft).
  4. Catalytic Converter Seal (3) - Install
    GM4406530Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    Install a NEW catalytic converter seal.

  5. Warm Up Three-Way Catalytic Converter (2) - Install
  6. Catalytic Converter Nut (1) - Hand tighten [4x]
  7. Catalytic Converter Brace Bracket-Upper (2) - Install
    GM4406306Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    Ensure the brace bracket is flush with the engine block boss.

  8. Catalytic Converter Brace Bracket Bolt (1) - Hand tighten [2x]
  9. Catalytic Converter Brace Bracket-Lower (3) - Install
    GM4620829Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    Ensure the brace bracket is flush with the catalytic converter tab.

  10. Catalytic Converter Brace Bracket Bolt (2) - Hand tighten
  11. Catalytic Converter Brace Bracket Bolt (1) - Hand tighten
  12. Catalytic Converter Nut (1) - Tighten [4x] 50 N.m (37 lb ft)
    GM4406530Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    Tighten the catalytic converter nuts in a cross pattern.

  13. Catalytic Converter Brace Bracket Bolt (1) - Tighten [2x] 22 N.m (16 lb ft)
    GM4406306Courtesy of GENERAL MOTORS COMPANY
  14. Catalytic Converter Brace Bracket Bolt (1) - Tighten 22 N.m (16 lb ft)
    GM4620829Courtesy of GENERAL MOTORS COMPANY
  15. Catalytic Converter Brace Bracket Bolt (2) - Tighten 58 N.m (43 lb ft)
  16. Heated Oxygen Sensor Electrical Connector (1) - Connect [2x]
    GM4406263Courtesy of GENERAL MOTORS COMPANY
  17. Exhaust Muffler - Install - Exhaust Muffler Replacement (LTG) 
  18. Turbocharger Heat Shield - Install - Turbocharger Heat Shield Replacement