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Home >> Cadillac >> 2021 >> CT4 Sport, 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 279 (Engine Cooling System - Repair Instructions) >> Repair Instructions >> Cooling System Draining and Filling (LSY GE 47716) >> Draining Procedure

Draining Procedure

WARNING: This page is about a different car, the 2022 Cadillac CT5. However, it is still accessible from the selected car via links, so may be relevant.
WARNING:

With a pressurized cooling system, the coolant temperature in the radiator can be considerably higher than the boiling point of the solution at atmospheric pressure. Removal of the surge tank cap, while the cooling system is hot and under high pressure, causes the solution to boil instantaneously with explosive force. This will cause the solution to spew out over the engine, the fenders, and the person removing the cap. Serious bodily injury may result.

WARNING:

To avoid being burned, do not remove the radiator cap or surge tank cap while the engine is hot. The cooling system will release scalding fluid and steam under pressure if radiator cap or surge tank cap is removed while the engine and radiator are still hot.

  1. Park the vehicle on a level surface.
  2. GM5318373Courtesy of GENERAL MOTORS COMPANY

    Radiator Surge Tank Cap (1) - Remove

  3. Raise and support the vehicle. Lifting and Jacking the Vehicle
  4. Front Bumper Fascia Center Air Deflector - Remove - Front Bumper Fascia Center Air Deflector Replacement
  5. Place a drain pan under the drain cock.
  6. GM5313433Courtesy of GENERAL MOTORS COMPANY

    Radiator Drain Cock (1) - Open

  7. Drain the cooling system.
  8. Inspect the coolant.
  9. If the coolant is discolored, perform the flushing procedure. Flushing 
  10. Radiator Drain Cock (1) - Close
  11. Front Bumper Fascia Center Air Deflector - Install - Front Bumper Fascia Center Air Deflector Replacement
  12. Remove the drain pan.
  13. Lower the vehicle.