so my 07 Impreza is leaking coolant, what a surprise right? head gaskets were done about 2k miles ago along with water pump and timing belt. I found a very small pool of coolant on the top of the engine on the passenger side however I can not locate the leak. It doesn't leak when the car idles, however when I drive it I usually lose 3/4 of the coolant in my reservoir...I've been refilling it but it seems pointless as I just continue to waste coolant. No hoses on the top or bottom of the engine appear to be leaking and the radiator appears to be fine- I'm stumped on this one any help would be appreciated.