6.4 hemi Engine running cold not throwing much heat

[Trucktracy]

My 2014 6.4 hemi ran cold and didn’t throw much heat. I was thinking thermostat, but have heard others say could be water pump or other things. 170000 miles. Any thoughts would be appreciated

 

[tron67j]

FYI, you are in 5th gen. Could be heater core too. Good luck.

 

[SniperDroid]

With that kind of milage, I'm guessing a typical Chrysler blocked heater core...

 

[WoodGuy]

Is the engine temp cold, or just no heat in the cab?

 

[crash68]

Is the engine temp cold, or just no heat in the cab?

^^^ this
What's the coolant temperature while driving? If that's not up around 200°F then it's a t-stat, if it is up there then suspect the heater core. There have been a few people reporting plugged heater cores on the HD trucks with about 50/50 shot of unplugging them by back flushing. My buddy just had to have his changed in his '14 2500.

 

[Trucktracy]

Engine temp is low about 125 to 140.

 

[crazykid1994]

You said coolant temp is 125°-140° when fully warmed up? Yea bad tstat for sure. Dang. That’s a wide open tstat. Coolant temp should be around 200°. No wonder you have no heat.

 

[buckeyexx]

What?? It only gets up to 125-140? Not sure how that’s possible. Maybe I’m wrong. Is that at full operating temps after driving around for a while. When my thermostat stuck open in my 6.4 I would still see temps around 185.

 

[MarineBSP]

If Trucktracy is anywhere near where I live, I'm not surprised. I can drive for over fifteen minutes on the highway after a cold start and none of the fluids will be up to temp this time of year - so an open T-stat would do that on shorter trips.

 

[buckeyexx]

If Trucktracy is anywhere near where I live, I'm not surprised. I can drive for over fifteen minutes on the highway after a cold start and none of the fluids will be up to temp this time of year - so an open T-stat would do that on shorter trips.

I agree if its a short trip and cold. I live in Ohio and it takes a bit to get up to temp. I was assuming he was saying thats the highest temp he could reach after driving all day or something. Thats how I read it anyway.