Just another cooling issue

[TimTaylor]

2018 ram 1500 6 cyl. I had an overheating problem. Found a small leak in the radiator so changed the radiator. Fan stopped working so changed the fan. Changed the thermostat. Now the display temp says 220, fan is not running and upper and lower radiator hose is cool to the touch. I am lost and now officially hate modern trucks. Any advice?

 

[crash68]

Changed the thermostat. Now the display temp says 220, fan is not running and upper and lower radiator hose is cool to the touch. I am lost and now officially hate modern trucks. Any advice?

Unless the new thermostat is bad it sounds like the system is air bound or possibly the water pump went out.
A cooling system still works the same on a 2018 as one from 1968.
There seems to be an uptick of bad temperature sensors being reported across multiple engine platforms on the forums so that a possibility but I would try to rule out any mechanical issues first

 

[Ken226]

2018 ram 1500 6 cyl. I had an overheating problem. Found a small leak in the radiator so changed the radiator. Fan stopped working so changed the fan. Changed the thermostat. Now the display temp says 220, fan is not running and upper and lower radiator hose is cool to the touch. I am lost and now officially hate modern trucks. Any advice?

As Crash68 said, a hot engine and cool radiator hose sound like air in the system.

Did you burp the cooling system when you refilled after the radiator swap?

If not, the you very likely have air in the system. I'm not sure what the procedure is in the v6, but perhaps this will help:

How to burp get air out while adding coolant on Pentastar 3.6 & other engines.

Bleeding air out of cooling system. (EP 349.494)âð© If this video helped you & you would like to make a modest donation to the channel, why not buy me a cof...

youtu.be

 

[crazy jerry]

best to use a vacuum tool but nobody ever does. thats why your heater dont work. rad hose are cold. and temp gauge is going wonky

 

[Taifun7]

Ya gotta love the technology that followed with this burp the cooling system BS. What a
pain, in the %*%*. The thermostat function operates off of hot liquid nothing else. If
there is air in the system against the thermostat it will not function properly. A closed
thermostat will not allow coolant flow hence the cold hoses. Good luck with burp. At
least start with that.