We are having a coolant leak problem. We cannot tell so far if its coming from the rear heater core, if the vehicle is equiped with a auxiliary condenser if that is leaking, if its coming from the pipes or hoses of if it is coming from the front heater core. There is no flooding in passennger apartment. Water is dumped onto the ground as soon as car is started. It comes from the middle of the car on the bottom on the frame.