Florida to Wyoming in my Class A

I use foaming A/C coil cleaner in the Sahara twice a year. There's an additional issue with this rig because the intercooler is sandwiched against the rad so stuff builds up in between. CAT motors also have a slobber tube that dumps the crankcase vent under the motor adding to the problem. I've done the slobber tube re-route and it seemed to help with the amount of muck.

My thermostat is 195° so 200 is ok. On most new electronic engines, the ECM won't allow the motor to self destruct. Downshifting circulates the water faster and runs the fan higher.