check your radiator hoses, they like to break right where the hose goes on the tube to the radiator. look for wetness. and it may only leak when the engines hot, not so much when cold if its the hoses, you also have 2 heater hoses on the pass side behind the alternator. same deal the hose wear out.

then the plastic elbow off the manifold, water pump, or even the radiator itself could be leaking. you just need to find the wet spot and trace it.