Hey guys. I have a 2008 6.4L F250. Coolant being forced out of degas bottle under the cap. Very few bubbles in tank when running.
EGR is still on truck. However, coolers and DPF has been removed. EGR disconnected.
Test was done for gasses in degas bottle. Was negative. Passenger side of radiator not above warm, if that. Lower hose is also not getting hot. Any suggestion. Thanks

 

Sounds like a waterpump issue. Those trucks have a plastic water pump impeller that has a tendency to crack. When it does the impeller no longer spins with the pump causing no coolant flow and thus overheating.

 

Degas caps are known to go bad esp if it's the original one from Ford.....Are the heater core lines getting hot? What does dummy gauge on dash say for coolant temps? Thermostats could be stuck closed maybe? As mentioned above could also be faulty water pump as well.