My girlfriends Uno has a leak, coming from the heater outlets, I thought it was a shagged matrix, but the coolant hasn't went down, and I caught some of the water in a container and it doesn't taste of antifreeze, I also think it is dependant on the amount of rain, we were driving tonight in the dry and nothing came out, even after 50 miles on the motorway, is there some drain for water going down the heater vents so it doesn't flood the car.?