I'm having difficulties finding a leak also, but I'm getting a puddle on the floor just inside the passenger side front tire. The only wetness I see is under the metal tube going to the heater core that runs across the bottom front of the engine (just under the crank pulley). I suppose it could be a pinhole leak in it, but I'm losing quite a bit of coolant. What would I see if the water pump was leaking? I'm seeing no staining that would indicate coolant dripping from the pump, but since it's buried, I'd assume I wouldn't see much anyway.
