| Mine certainly does none of those. Antifreeze is very good at finding its way out past very small holes. The dried residue should give you a clue where it came from.
Leaking past the filler cap might suggest excessive crankcase pressurisation. Unless the o-ring has got clear damage then I would have thought it shouldn't leak under normal circumstances. I'm not very familiar with these engines (yet) but is it possible that a blown head gasket could be pressurising both oil and water?
Keith |