a quick one to rule out belt start car run engine get some baby talcum powder and squirt on belt stand back or you will look like a snow man after it if the noise goes its the polly v belt
if the water pump look between the pulley and pump for a lot of oil it means the bearing may be burnt out then its the pump if its the tensioner pulley you will have play on it and with close inspection you may see cracks on the plastic