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Home >> Buick >> 2007 >> Allure CX >> Repair and Diagnosis >> External Pages >> Different car >> Section 14 (Heating, Ventilation, And Air Conditioning) >> Repair Instructions >> Compressor Replacement (LS4) >> Installation Procedure

Installation Procedure

WARNING: This page is about a different car, the 2008 Buick LaCrosse and 2008 Buick Allure. However, it is still accessible from the selected car via links, so may be relevant.
    NOTE: Refer to Fastener Notice .
  1. Install the compressor drain plug.

    Tighten:  Tighten the drain plug to 16 N.m (12 lb ft).

    2. Fig 1: Identifying Rear Mounting Bolt At A/C Compressor
    GM1548417Courtesy of GENERAL MOTORS CORP.
    IMPORTANT: Install the A/C compressor ensuring that the back of the A/C compressor is inserted onto the bolt. Do not tighten the bolt at this time.
  2. Install the A/C compressor into the vehicle.
    3. Fig 2: View Of Front Mounting Bolt At A/C Compressor
    GM1548416Courtesy of GENERAL MOTORS CORP.
    IMPORTANT: Do not tighten at this time.
  3. Install the front A/C compressor mounting bolt.
  4. Install the front A/C compressor mounting stud.

    Tighten:  Tighten the stud to 10 N.m (89 lb in).

  5. Install the front A/C compressor nut.

    Tighten: 

    • Tighten the nut to 50 N.m (36 lb ft).
    • Tighten the front bolt to 50 N.m (36 lb ft).
    • Tighten the rear bolt to 50 N.m (36 lb ft).

    6. Fig 3: Locating A/C Compressor Electrical Connector
    GM1548455Courtesy of GENERAL MOTORS CORP.
  6. Connect the A/C compressor electrical connector.
  7. Raise the cradle into position and tighten the bolt.

    Tighten:  Tighten the bolt to 145 N.m (107 lb ft).

  8. Remove the floor stand from under the vehicle.
    9. Fig 4: View Of Stud At A/C Compressor
    GM1548471Courtesy of GENERAL MOTORS CORP.
  9. Install the stud to the back of the A/C compressor.

    Tighten:  Tighten the stud to 10 N.m (89 lb in).

    10. Fig 5: View Of A/C Compressor Hose At A/C Compressor
    GM1548414Courtesy of GENERAL MOTORS CORP.
  10. Install new sealing washers. Refer to Sealing Washer Replacement .
  11. Install the A/C compressor hose to the A/C compressor.
    12. Fig 6: Locating A/C Compressor Hose Nut
    GM1548415Courtesy of GENERAL MOTORS CORP.
  12. Install the A/C compressor hose nut.

    Tighten:  Tighten the nut to 17 N.m (12.5 lb ft).

  13. Install the lower radiator air baffle and deflector. Refer to Radiator Air Lower Baffle and Deflector Replacement .
  14. Install the drive belt. Refer to Drive Belt Replacement - Accessory .
  15. Evacuate and recharge the A/C system. Refer to Refrigerant Recovery and Recharging .
  16. Leak test the fittings of the component using J 39400-A  . See Special Tools .
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