94 f150, i6. was having heat issues AND a small coolant leak in the cab. Replaced the heater core, the leaking is still persisting, haven't gotten around to the heat yet. The pics show where it is leaking from. Did i get a bad heater core, or what else is there, or did I do something wrong?

 

Could be left over coolant from the bad core draining now. Depending on how long the old core leaked it will probably diminish.