I have my flywheel off right now and have noticed a ...what I thought is a oil leak. I Was not sure if it was the pan or a rear crank seal... which I have replaced both of those lately anyway. I noticed some oil like stuff on the back of the motor....so I wiped it all down from the head to the crank just to clean things up abit. I have not ran the engine after I cleaned it up... FYI.
It looks like a oil stuff that is coming from the passenger side freeze plug? I have new antifreeze in the system (almost pure antifreeze... not much water) but have not looked for oil in the cooling system while running (it would seperate later). Not seen antifreeze in the oil either? After I wipe it down it takes a day or so to show up. Is it possible that the antifreeze could be looking like oil after the any H2O evaporates? Feels and looks like clean oil between the fingers? Not any smell to give direction either. The engine oil is clean too right now.... So It has looked like oil to me so far.
Like to take care of this one before I put the flywheel on. The engine is a '67 230.
Thanks, Clyde