As I reported in the Mechanical section, I have had a noise coming from the front of the engine. I thought it was the tensioner pully, but wasn't sure. Today I went to HF and bought a Mechanics stethoscope for $4 and it really works well. It ID the water pump, but I wasn't convienced, so I checked the Focus with the tool and sure enough it was very quite. I got under the engine and removed a couple of plastic panels and saw a deposit trail coming from the pump. These things realy work.