Nothing worked for me. I am an ASE certified mechanic. A customer walked in with a small coolant leak in the water pump of a 2000 Chevy Cavalier. After finding out that his correct solution would cost $750, he wanted to try one of the stop leaks. He saw it on the TV show Truck U and wanted to try it. Follow the directions and I don't think it helped stop the leak. It's a real shame because I think he just threw the car away because it's not worth such a serious and expensive repair. It was leaking such a small drop that I hoped it would work, but it didn't.
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