My car is making a loud sort of clicking noise I was told it's the water pump?

What should I be looking for once I remove the belt?

Remove the accessory drive belt then momentarily start engine and let it run a minute to see if noise is gone... If it is, stop engine and turn ALL driven components by hand trying to duplicate what you heard before .... If noise doesn't go away with belt removed, it's obviously an engine problem, 'not' the accessories which includes the H2o pump!