squeak detection

Hi
finnally got the landy back together but detected a squeak (more of a squeal) from the drive belt area, thought I had it sourced to the tensioner pulley but a new one has not fixed it, still seems to be around the tensioner/water pump (the pump is new as well)
I have tried the bar on the pulley to hear it better but no joy
any ideas

Try dribbling some water on the belt and see if it shuts up , if it does then either live with a noisy belt or buy a new one