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How To Super Flush Your Cars Cooling System

How To Super Flush Your Cars Cooling System

Keeping your vehicle from overheating requires regular maintenance of your cooling system. This will extend the life of your vehicle and prevent roadside emergencies. Check the manufacturer’s specs to see how much coolant your vehicle holds. That way you’ll know what percentage of the coolant drains out. A few days prior to flushing your vehicle add a chemical coolant flush to help flush out any debris and contaminants. A few days later the coolant flush will have circulated throughout the cooling system, the hoses, the radiator, etc.


  • Basic Hand Tools
  • Drain Pans
  • Distilled Water
  • A second container of Chemical Flush
  • Coolant (Check your owner’s manual to find out which coolant is recommended, and how much you need)

STEP 1 Draining the coolant

Start with a cool engine. Remove the radiator cap and open the radiator drain cock, allowing the coolant to drain into a pan. Next, move the dashboard temperature gauge lever to hot, so if your vehicle has a coolant control valve, it will open. Draining the radiator should remove 40-45 per cent of the coolant. The remaining 55-60 per cent of coolant needs to be drained from the coolant reservoir. After the initial drain, fill the system with distilled water, then warm up the engine and let it cool. Drain the radiator again and fill it once more with water. Repeat.

STEP 2 Bleed the system

Check your owner’s manual to find out how much liquid your system holds. If the system holds 20 litres, you want to install 10 litres of undiluted antifreeze, or exactly half of the cooling system’s capacity. The cooling system has a lot of nooks and crannies which trap air and make it difficult to fill the system with coolant. Check for air bleeds on the engine. If there’s an air bleed, open it. Pour in the recommended amount of antifreeze slowly until you see coolant oozing out of the open air bleeds. Then close the bleeds and top up the system with the remaining antifreeze and distilled water.

STEP 3 Choose which Antifreeze

Refer to your vehicle manufacturers recommendations. Pour in the recommended amount of antifreeze then top up with distilled water.

Note: The recommended antifreeze replacement interval is two years or 50,000 kilometres.