[91supraT]

Lately I have been hearing the waterfall behind the dash whenever I start the car, and today, i saw some coolant dripping, so I pop the hood, and my overflow bottle is completely filled. Im guessing the dripping was coming from the overflowed bottle, but what is causing this?

sounds like it is probably a bhg. causes you to kick back coolant through the overflow when the coolant and oil and combustion gases all mix