text:  What do you mean? I said, you need a new radiator cap. What's that to do with it? He said, well, you're pushing coolant out, but it's not pulling any back in. I said, your overflow bottle? Yep, it's full. So it's spilling on the ground. Go get yourself a cap, fill it up, let me know what happens. So I took the cap loose. We put the right amount of coolant in it, left it loose a little bit. He went to the store, bought a cap.