The belt tensioner assembly is new. And it wasn't squeaking until after I put the new harmonic balancer on. This may sound basic, but what is it about bad belts that make them squeal? Also, there is a small coolant leak around my water pump. I believe it is the gasket, as it seems to be leaking out near the back of the pump over the power steering pump. The weep hole is under the pulley right, so I should get coolant on the belts and all around the engine bay if it was coming out of that right? (Just want to make sure my noise is not coming from the water pump, although I had the pump off a couple of weeks ago and all seemed ok).