'06 4.4i grinding noise from engine bay

[kvc]

Be sure to replace the o-rings in the hoses you take off the water pump, as the old ones may leak having been 'flattened' over time. Bottom bolt on water pump is a bitch to remove, without taking crank-shaft pulley off (10mm short open-ended wrench will do). To make it easier to put back on, grind off about 2mm of the bolt length. Just done this job - a bit fiddly but not too difficult. It's recommended to replace the thermostat, belts and tensioner/idler pulleys while in there too.