I had a coolant leak for about 6 months now. At first I thought it was a hose leaking but then I saw a crack in my radiator. Whenever my engine had a lot of stress (hard acceleration over 80 mph), the leak opened up and squirted coolant like a thin water fountain. It felt as if my maxi was loosing blood and dying. Now I had a decision to make, buy a new radiator or refill it every week. As a last effort, I went to my local pep boys and found a funny looking green bottle of some type radiator leak sealant. I know what you people are thinking "no don't do it" but I did. Followed the instructions on the back and poured that sucker in. Radiator has be fine ever since. Best of all the internal sealant thingy cost me four bucks and it has a money back guarantee. A guarantee that made the total cost of my fix 0.00. Now that's the most bang for the buck.