Coolant temp

[Natesasr]

Just got my new 2500 4x4 6.4 yesterday. Driving unloaded 75 mph down highway my coolant temp stayed on 219..... What temps are you guys seeing?? I know it's not broke in yet but it seem a little high. Oil temp stays 5 degree higher which is ok.....my 392 challenger runs 210......

 

[Hootbro]

Your temps sounds about average. I run 215-225 depending on the day and how "spirited" I am on the throttle.

These 6.4's have a higher rated thermostat and run hotter by design it seems. I would not worry over what you are seeing.