Charge Air Cooling System Flushing
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:
Dispose of the used engine coolant properly. Store the used coolant in a used coolant holding tank awaiting proper disposal or recycling. Do not pour used coolant down the drain. Ethylene glycol antifreeze is a very toxic chemical. Disposal into the sewer system or into the ground water is both environmentally irresponsible and illegal.
NOTE:
Do NOT use a chemical flush.
When the charge air cooling (CAC) system becomes contaminated, the CAC system should be flushed thoroughly to remove all contaminants.
- Drain the CAC system. Charge Air Cooling System Draining and Filling (LGY) , or Charge Air Cooling System Draining and Filling (LT4)
- Fill the CAC system using only clean, drinkable water. Charge Air Cooling System Draining and Filling (LGY) , or Charge Air Cooling System Draining and Filling (LT4)
- Using the scan tool function, activate the CAC system pump and allow the pump to run for 5 minutes.
- Drain the CAC system. Charge Air Cooling System Draining and Filling (LGY) , or Charge Air Cooling System Draining and Filling (LT4)
- Repeat the procedure if necessary, until the fluid is colorless.
- Fill the CAC system. Charge Air Cooling System Draining and Filling (LGY) , or Charge Air Cooling System Draining and Filling (LT4)