[sarotara]

If it's an external leak you can look around the engine bay with a flashlight after driving the car for a bit and try to find where the coolant is leaking from. Carefully, because the engine will be hot. If it's an internal leak, you will get some white smoke out of the exhaust. There might also be a distinctive coolant smell after driving the car. If I had to take a guess, I would say that it's most likely the lower intake manifold gasket that's leaking. Make sure that you bought the revised gasket.