I have a 2000 olds intrgue with a 3.5 engine. It leaks antifreeze after it's hot, I can hear water sloshing around from the inside, sometimes the windows fog a little bit but I smell no antifreeze inside, I can see where water has leaked and ran down the drives side of the engine. I'm not sure if the intake can be leaking (plastic) and thats where I'm hearing the sloshing water or if it's in my heater box (heater core) but if it were there I think i'd smell antifreeze?