its either the water pump, doubtful, never seen one leak from the top, could be a hose, could be the intake, if its the intake feel lucky, i checked the oil in my show truck today, and it was chocolate milk colored, my moter is now a boat anchor, when it goes outside like yours did if its bad, nothing bad happens, gaskets need changed, the bad news is if you dont want to do major engin work, its going to cost you between 650 and 1200 usd