My truck only has 41,000 miles (completely stock) and the water pump needs replacing. Dealership is doing the work since it is under warranty. When I discovered the leak, the coolant looked more brown than I was expecting and I am wondering if there could be a larger problem I should look for (i. e. oil in the coolant possibly?). Any suggestions would be appreciated or is this normal for the coolant. I am a little concerned, not to mention #@$%! that I have issues at 41k.