When I cold start my car I hear a horrid noise coming from the engine bay. I have narrowed it down to the water pump pulley. It sounds like a cricket, but its non stop. I sprayed some lubricant on the face of the pulley at the bearing point which quiets it down for about 2 seconds. It usually stops being noisy after about 10-15 minutes of driving. I just changed the alternator last week and the belt seemed a bit tighter afterwards, I was wondering if this could be caused by the belt being to tight?