How to Get Air Out of Coolant System?

Let the engine cool completely

Park on a level surface or with the front slightly elevated

Check the coolant level and top off the reservoir with the correct coolant mix

Open the radiator cap only when the engine is cold

Start the engine and set the heater to maximum heat

Let the engine idle and watch the coolant level

Add coolant as the level drops

Squeeze the upper and lower radiator hoses gently to help move trapped air

Use the vehicle’s bleed screw or air-bleed valve if equipped

Keep the radiator or reservoir filled to the proper level

Wait until the thermostat opens and the upper hose gets hot

Continue idling until bubbles stop appearing

Rev the engine lightly a few times if needed

Replace the radiator cap securely

Let the engine reach operating temperature

Shut the engine off and allow it to cool

Recheck the coolant level in the radiator and reservoir

Top off again if needed

Repeat the bleeding process if overheating or gurgling continues

Suggested for You

Trending Today