Re: Water Pump Failure - Why and How? I worked for a company that remanufactured water pumps for all makes of cars, and can only conclude that there was a defective bearing involved in your case. Running a pump dry would only damage the seal, not the bearing. And since you saw no leakage, your seal was okay. An over-tight belt is not a good thing, but these bearings are very, very tough with extremely high radial load ratings, and it is pretty unlikely that one could fail in three months only because the belt was over-tight. Unless, maybe, one of your pulleys has a groove that's non-concentric to the shaft, and it's putting REALLY high and oscillating loads on it. But really, I suspect it's just a bad batch of pump bearings that maybe they left the grease out of or something. |