Many of you followed the saga of the noise coming from my timing belt area after I changed the belt and the water pump.
The noise eventually went away on it's own, and I think we determined with a pretty high level of certainty that the source of the noise ( metallic clicking at a uniform 16 Hertz ) was the water pump.
The water pump is a GMB, which I understood to be a pretty reliable company.
So why would a brand new water pump make noise like this which after a few hours of operation goes away on it's own?