So yesterday i pressure washed my engine block and i had it in the sun a while for it to dry, today after going to a car show i opened the hood and i saw there was clearly like a wet patch between the head and the block, doesn't seem to on the other side, is this the head gasket seeping coolant? there seems to be no coolant getting into the cylinders as the fumes from the tailpipes are absolutely clear, no smoke or vapour.