Hello,
I have a problem with my 06 durango 5.7hemi. It's leaking antifreeze and over heats sometimes, the heater don't work sometimes and works on recirc. and this is where it over heats. From what I can see the leak is coming more towards the front-end of the vehicle. Thermostat has been changed, I have been putting antifreeze in to keep my vehicle warm, I live in northern mn and it's been in the -40 ranges this past 2wks almost. Any ideas of what this maybe would be most appreciated, I just hope it's not a headgasket.

 

Have you checked the water pump?

 

I would just recommend that you get under there and check every single spot where it can leak from. Its a daunting process and a pain in the rear. Have you smelled the anti freeze inside the vehicle. Do you have any leaks above the passengers feet? Is the passenger floorboard wet? If so that would mean your heater core. It doesn't sound like that is your problem though.