20-10-12, 07:02 PM
When the engine first over heated it could have loosened all sorts of crap which may be what you are now seeing. If you run the engine with the pressure cap off and see loads of bubbles in the water, that would indicate the head gasket has blown. Darrsi's suggestion for locating the source of the leaks sounds good. Otherwise a short ride might reveal where the water is coming from. If after a short ride the plastic tank has considerable more water in, then again it could be the head gasket due to the system becoming over pressurised.