97 v6

i have a 97 2.5 v6 and it is over heating,,,i noticed water under the intake manifold running down off of it ,,,are there any water coolant line under the intake mannifold and top of engine block....is there coolant running through intake??also when i take the radeator cap off and fill it with water it will burp up almost all the water i put in it ,,,if i idle it up a tiny bit and fill it then put cap on its ok for a day or so,,,but it bubbles out the water into the resovoiur say at red lights
and i cant seem to be able to see were the water is leaking from,,i replaced cap but i still hear the blurp blurp coming from the return line