I had been losing some coolent on the ground recently and i thought that i had located the lower radiator hose as where the coolent was getting by. I took it and replaced the whole thing and put new coolent in and in the resevoir. I drove it around the block and the coolent in the resevoir went from full down to low. It did this earlier when i was letting the car run and i just thought that i had not added enough coolent. Please help i need to use my car tonight and i don't want it to overheat.