2001 Hyundai Elantra timing belt

I had to replace the water pump in my 2001 Hyundai Elantra and had to remove the timing belt. I put it all back together and think that I've over tightened the timing belt. When I start the engine and drive the car I hear a wining noise that to me sounds like the teeth on the timing belt are not meshing with the pulley. How tight do I make the timing belt.