Can the additive crap do some damage? What do you mean by save my radiator? The liquid on the floor seemed watery unlike clutch and brake fluid. I will check again, but it really seems like coolant. I also cannot find a trail, just the puddle. The rear heater line leak was spraying upwards from underneath when it happened, but the chances of it somehow going through the floor seems small. If the heater core is on the passenger side I am really confused. I am hoping someone with similar experience will help.I need a vacation <img src="/forums/images/graemlins/zombie.gif" alt="" />