:tiphat Welcome :tiphat . The only way to prevent that would be to have an overflow reservoir for the overflow reservoir, etc, etc. There should be COLD/HOT markings on the front side of the overflow tank. Is the level above the HOT mark?Mike I agree with you that is the way it appears, I just find it hard to believe that the overflow would dump a hazardous chemical on to the ground.
My motor was recentlry replaced and I suspected this connection did not get reconnected.