My 2000 XJ 4X4 4.9L serpentine belt or tensioner pulley squeals like 100 dying cats when I start her up. I cannot determine whether or not it's the belt or tensioner. I just put a brand new belt on (per the routing diagram) and tightened her down (has about 1/2" - 1/4" depression). The belt is tight on there so it shouldn't be squealing but she is like a stuck 🐷!! Also when I installed the new belt and tightened her up and hit the throttle I was sprayed by water, if that helps the diagnostic any?