Charge Air Cooling System Flushing (LF4)
WARNING: This page is about a different car, the 2017 Cadillac ATS. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
Do not use a chemical flush.
Store used coolant in the proper manner, such as in a used engine coolant holding tank. Do not pour used coolant down a drain. Ethylene glycol antifreeze is a very toxic chemical. Do not dispose of coolant into the sewer system or ground water. This is illegal and ecologically unsound.
Various methods and equipment can be used to flush the cooling system. If special equipment is used, such as a back flusher, follow the manufacturer's instruction.
When the charge air cooling (CAC) cooling system becomes contaminated, the CAC cooling system should be flushed thoroughly to remove the contaminants before the supercharger is seriously damaged.
- Drain the CAC cooling system. Refer to Charge Air Cooling System Draining and Filling (LF4)
- Follow the drain and fill procedure using only clean, drinkable water. Refer to Charge Air Cooling System Draining and Filling (LF4)
- Command the CAC pump to the ON position using the Tech 2 or by starting the engine. Run the CAC pump for 5 minutes.
- Drain the CAC cooling system. Refer to Charge Air Cooling System Draining and Filling (LF4)
- Repeat the procedure if necessary, until the fluid is colorless.
- Fill the CAC cooling system. Refer to Charge Air Cooling System Draining and Filling (LF4)