I have a 98 ex and this morning i over heated for the first time so i pull off the freeway and find that i have no coolant so i fill with water and i do the same for the over flow... I get to work fine i have lil to no water left in the overflow and when car is ideling there is a lil white smoke and there is some liquid coming from the exhaust??? I also notcied the smell of collant in the engine bay but i couldnt see any leaks? If it is is the head gasket hard to replace? It seems pretty simple?