Overheating, pushing water to overflow but not returning to radiator.

[Thefireman]

I have a 2012 ram 2500 6.7. Out of nowhere my truck started overheating. Has been running great. It is deleted. I just installed a monster ram intake. I was on my way home and truck red lined then cooled down. Then bounced between 220-240. Went home put a OEM thermostat in it. Overheated again. when I refilled the radiator I thought I might not have bled out all of the air. I bled out the air refilled, let cool, and bled again. Ran good for several days then same thing. I then changed water pump and radiator cap. Refilled, bled air several times. Was fine for about 2500 miles. I took a trip so this was in just over a week and now is overheating again. Any ideas? Why would it not suck water back from overflow? It is full.

 

[flan]

I’d get some test strips to see if there are any combustion gasses in the coolant. That would let you know if there’s a head gasket problem.

 

[Thefireman]

I’d get some test strips to see if there are any combustion gasses in the coolant. That would let you know if there’s a head gasket problem.

Thanks for the input. It turned out to be a loose hose clamp where the EGR was delegated.

 

[flan]

Easy one there, thanks for the follow up.