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Home >> Cadillac >> 2021 >> CT4 Sport, 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 56 (Heating, Ventilation, And Air Conditioning - Repair Instructions) >> Repair Instructions >> Air Conditioning Compressor 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. It is necessary to perform the air conditioning compressor oil balance procedure when replacing the air conditioning compressor. Air Conditioning Compressor Oil Balancing 
  2. GM5316589Courtesy of GENERAL MOTORS COMPANY

    Maneuver the air conditioning compressor (3) into the engine compartment.

    3. CAUTION:

    Refer to Fastener Caution .

  3. Air Conditioning Compressor Bolt (2) - Install and tighten - Fastener Specifications
  4. Air Conditioning Compressor Nut (1) - Install and tighten - Fastener Specifications
  5. GM5479911Courtesy of GENERAL MOTORS COMPANY

    Air Conditioning Compressor Nut (1) - Install and tighten - Fastener Specifications

  6. GM5479910Courtesy of GENERAL MOTORS COMPANY

    Engine Wiring Harness Connector Bracket (2) - Install

  7. Engine Wiring Harness Connector Bracket Nut (1) - Install and tighten - Fastener Specifications
  8. GM5460376Courtesy of GENERAL MOTORS COMPANY
    CAUTION:

    Refer to Air Conditioning Sealing Washers Oil or Lubricant Exposure Caution .

    Air Conditioning Compressor and Condenser Hose Seal (3) - Install NEW

  9. Air Conditioning Compressor Hose Seal (2) - Install NEW
  10. Air Conditioning Evaporative Connector Hose/Tube and Compressor Hose (1) @ Air Conditioning Compressor - Install
  11. GM5315475Courtesy of GENERAL MOTORS COMPANY

    Air Conditioning Compressor Hose Nut (1) - Install and tighten - Fastener Specifications

  12. GM5321065Courtesy of GENERAL MOTORS COMPANY

    Connect the electrical connectors. (1) [3x]

  13. GM5471834Courtesy of GENERAL MOTORS COMPANY

    Position the radiator inlet hose (2) to its original routing and fasten the radiator inlet hose clip (1).

  14. GM5479896Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    Some components not shown for graphic clarity.

    Use the appropriate tool, rotate the drive belt tensioner (1) counterclockwise to install accessory drive primary belt (2) onto the air conditioning compressor (3).

  15. Rotate the drive belt tensioner (1) clockwise allowing tension to be applied to accessory drive primary belt (2).
  16. GM5480015Courtesy of GENERAL MOTORS COMPANY
    CAUTION:

    Verify the charge air cooler inlet and outlet air tube quick connect seal condition and location prior to installation. Seal must be evenly seated in the quick connector body and sealing surface must be free of deformation and damage. Deformed or damaged seals can lead to reduced engine power and/or engine stalling.

    NOTE:

    DO NOT insert fingers inside quick connect to manipulate duct during disassembly/assembly. Rubber pad gloves increase risk to dislodge seal.

    Position charge air cooler outlet air tube (2) perpendicular to charge air cooler (3) and install.

  17. Retainer Spring (1) - Engage
  18. Verify connection is properly made by pulling and pushing on the tube at the quick connector location.
  19. GM5422180Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    Some components not shown for graphic clarity.

    Front Wheelhouse Liner- Left Side (3) - Install

  20. Front Wheelhouse Liner Retainer (2) - Install [4x]
  21. Front Wheelhouse Liner Bolt (1) - Install and tighten [7x] - Fastener Specifications
  22. GM5421515Courtesy of GENERAL MOTORS COMPANY
    NOTE:
    • Some components not shown for graphic clarity.
    • Quantity of fasteners may vary based on option content.

    Engine Front Splash Shield (3) - Install

  23. Engine Front Splash Shield Screw (1) - Install and tighten [5x] - Fastener Specifications
  24. Front Compartment Air Deflector Retainer (2) - Install [2x]
  25. GM5422163Courtesy of GENERAL MOTORS COMPANY

    Front Bumper Upper Fascia Screw (2) - Install and tighten [2x] - Fastener Specifications

  26. Front Bumper Fascia Air Deflector Screw (1) - Install and tighten [3x] - Fastener Specifications
  27. GM5394612Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    Quantity of fasteners may vary based on option content.

    Front Tire Front Air Deflector (2) - Install

  28. Front Tire Front Air Deflector Bolt (1) - Install and tighten [4x] - Fastener Specifications
  29. Install the left front tire and wheel. Tire and Wheel Removal and Installation
  30. GM5314509Courtesy of GENERAL MOTORS COMPANY
    CAUTION:

    Verify the charge air cooler inlet and outlet air tube quick connect seal condition and location prior to installation. Seal must be evenly seated in the quick connector body and sealing surface must be free of deformation and damage. Deformed or damaged seals can lead to reduced engine power and/or engine stalling.

    NOTE:

    DO NOT insert fingers inside quick connect to manipulate duct during disassembly/assembly. Rubber pad gloves increase risk to dislodge seal.

    Charge Air Cooler Outlet Air Tube (2) @ Throttle Body (3) - Install

  31. Retainer Spring (1) - Engage
  32. Recharge the refrigerant. Refrigerant Recovery and Recharging 
  33. Inspect for refrigerant leaks.
  34. Start vehicle and listen for whistling at the charge air cooler outlet air tube quick connect located at the charge air cooler.
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