1997 Chevy Silverado 1500, 5.7 liter, Automatic, 4X4, Z-71 I have a water leak on the drivers side rear of engine, I can see it coming down the back of the engine, it drips on the exhaust. I can't see exactly where it comes from. I did notice a small leak in the last few weaks. The leak is now bigger. What can it be that is leaking at the back of the engine, the manifold or something? I have never overheated the truck or had any kind of over heating problems in the past. I was thinking of using BAR's Stop leak. Any suggestions would be great. Thanks.