hrmm... I forgot to mention something before. When I turn my car on, well, ive only noticed then when I leave school, so at 4 in the evening after the car is sitting for a good 7 hours, when I turn the car on I can hear a rubbing noise coming from the engine. It is not continuous, but turns off and on about twice a second. After a few seconds, it goes away.... does this further point to the waterpump?