I have a 86 IROC Z28 and have been having some issues with its stock 305 Engine. Radiator Coolant is leaking from the upper lip of the oil pan, however when I check my Oil their isnt any coolant leaking into my oil which would result to foam bein on my dipstick whenever i check. I have no idea where or how it could be leakin the way it is without water in my oil. can anybody give me any suggestions on what could be the matter and how i can fix it?

 

Check the weep hole on the bottom of the water pump or the bottom of the pump itself where it mounts to the engine, could be leaking enough down on the upper lip to cause what you're finding. Alternatively, check the Fan Switch sensor on the passenger side, the knock sensor hole on the passenger side and the temp gauge sensor on the drivers side. Any one of those could be leaking down enough to cause what you're finding.