Actually, the black pepper will seep into the crevices of a leaking gasket or whatever and swell up to stop the leak. This is not the right way to fix it, but may, and I say MAY stop the leak. It won't hurt your system, so why not give it a try? I did it on my old F-150 and it worked. It's just a suggestion, so take it for what it is worth. Otherwise, pay the big bucks to have it done right.