About a month and a half ago i put some cleaner in my radiator cause it looked like swap water. Took the hose off the water pump and let it drain till it quit pouring out. Filled it back up with straight water and poured the liquid cleaner in it. Well it started getting cold here about 2 weeks ago so i changed it back out with antifreeze. Drained it the same exact way. Well ever since i put antifreeze back in when i turn my heater on i smell anitfreeze. Not the whole time, itll start smellin untill the jeep is completly warmed up then the smell will go away. When i crank it i dont start the heater but i usually wait till the temp guage says 100 or so (usually when i proceed to drive it) and from there till it gets to almost 200 (where it usually sits) only while the heater is on i can smell it. I felt in the floor on the passenger side and didnt feel anything. Well while i was cleaning it today i pulled the drivers top floor mat out (i have 2 floor mats in it- UGA ones and the factory ones) and there was a HUGE wet spot on the bottom floor mat and on the carpet. It didnt have a antifreeze smell but more of a musty smell. I looked at the radiator is full and the over flow bottle went from full to right above add so it hasnt lost much. I know it doesnt have a blow head gasket cause its no in the oil and i dont believe the water pump is leaking cause i havnt seen any spots on the driveway or anywhere where i park. The only thing ive ever seen leak is the cut hose right above the from coming off the firewall in the pic below. Anybody have any ideas of what could be leaking into my floor board?

 

Hello, I have had the same problem with my jeep xj 1998 sport. I thought it might have been the drain plug for the AC but checked that and it was not clogged or anything. I am going to try flushing the heater core (I think someone had a how to on here). From what I understand it may dislodge or clear any debris in the heater core itself. If you make any progress with this let me know. Oh yeah The drain for the AC should be on the passanger side of your jeep. (that is where i found my puddle). Appreciate it

 

the hose in the pic is for condensation that forms on the evaporator when using the ac if theres coolant coming out of it the heater core has a hole in it

 

Kind if a dumb question but are your floor boards rusted through?

I found out mine were when I stumbled upon a wet spot on my floor. Looked underneath and found out the only thing there was the carpet. And it was soaked from the wet roads.