...overheating....what can it be? I heard my car bubbling and I knew that it had to be the coolant b/c it happened to me already once last week. This time I saw smoke coming out so I immediately turned the car off. Then I waited a couple of minutes and opened the hood. I saw that the coolant level was above full. I also noticed that the liquid inside the coolant was a rusty color. I could not tell if it was leaking since it is raining and the ground is wet. I don't know what I need to do or check?? Someone told me that it could be my water pump or radiator.