How to Get Air Out of Cooling System?

Let the engine cool completely

Park on a level surface or with the front slightly raised

Check the coolant level in the radiator and overflow tank

Remove the radiator cap or coolant reservoir cap if safe to do so

Fill the system with the correct coolant mixture

Open any bleed screws on the cooling system

Start the engine and set the heater to maximum heat

Let the engine idle until it reaches operating temperature

Watch for air bubbles escaping from the radiator or bleed screws

Add coolant as the level drops

Squeeze the upper radiator hose gently to help move trapped air

Close the bleed screws once only coolant flows out

Replace the radiator cap securely

Let the engine run until the cooling fan cycles on and off

Shut off the engine and let it cool again

Recheck coolant levels in the radiator and reservoir

Top off coolant if needed

Inspect for leaks and repeat the bleeding process if necessary

Suggested for You

Trending Today