Hey guys I'm in the process of building my XJ. its going to the shop this week to have a D44 mounted up front with a toyota E-locker * inch in the rear next week(because I don't have the time). anyways its been steaming and leaking coolant around the top hose for the past few days and today it overheated on me in thebrixk 2 degree wyoming air. my heater does NOT put out any hot air as of yesterday and I topped off the overflow tank tday(it was almost empty) and its still at the level I left it. I haven't had much of a chance to look at it yet but if anyone has had a similar problem, some advice would be great. O yeah and I replaced my thermostat about six months ago.
Thanks

 

Hows the antifreeze mix? Could it have froze?