I have a 2000 tibby auto.. pretty much base model. My car has been over heating lately and i have check all the usuall suspects; Radiator, hoses, water pump, dipstick, ect. I found that every few days now my coolant is empty. Recently I put in a new radiator in the car, new hoses, new t-stat. I see no leaks under the car and no leaks in the engine bay. I started smelling cooland in the car so i started looking around. I pulled the floor mat on the drivers side and the carpet is soaking wet. Could this be a bad heater core? I had a 1987 Nissan 300 zx that had over heating problems so i wouldent say in a novice, but i've never dealt this this exact issue. Could some one offer advise?