What does it mean when the radiator overflow tank is bubbling?

Answer by  Xceptional (642)

It means that your car is running very hot without receiving much cooling or ventilation. You can either try adding more anti freeze or water or simply taking it in. It's possible that you either have a crack in your radiator, or simply i leak in the hose that connects your overflow.

Answer by  Amber40 (24961)

Well any type of bubbles in the coolant indicates air in the system. This could be something as simply as air trapped in the system that wasn't properly bled out when it was last filled or something as severe as cracked head. IF it keeps doing it then you should take it to mechanic and have them take a look.

Answer by  laura27 (1216)

Car is overheating and running hot, not receiving much cooling or ventilation. Try adding anti-freeze or water. You could have a cracked radiator or leaking hose that connects to overflow.

Answer by  ck (23)

Over heating,let the car cool off.Then check the radiator cap, and see if fluid is right color Usually red or green. If it is older than 4 years it might time to replace . Then check the oil and see if its white, if is the you have a head gasket out or a bad head. Call you macanic