Coolant temperature

[JS1500]

Lately my coolant temperature has gotten up to 219* in city/short highway driving. It usually fluctuates between 204-219*, but 219* seems high. If it makes a difference, my truck is stock. Are these temps normal?

 

[Burla]

Yeah, way under what coolant boils at. You have the 8 speed? 2015?

 

[JS1500]

Yeah, way under what coolant boils at. You have the 8 speed? 2015?

Yep, I have the 8 speed.

 

[Burla]

What is your transmission temp when your coolant temp is 219? You guys with the 8 speed have a cluster **** known as the thermal bypass valve that is mated with your tranny. It is supposed to shut off and turn on yada yada to get the transmission at a perfect temp, but as we have seen on this forum it is horse ****. Some guys run religiously at 180f, and some others run religiously at 225f. I know the coolant heats the transmission oil in the name of fuel efficiency by heating the oil it makes it move faster and the epa says that is a good feature to have in a truck and FCA agreed, but I don't know if it can cool the transmission that would by default heat the coolant.

 

[69GWC]

Mine after 1.5hrs of pulling my 28ft camper.

Nothing wrong with 219 really imo.




And a pix of just normal driving temps.

 

[crash68]

Mine after 1.5hrs of pulling my 28ft camper.

Nothing wrong with 219 really imo.

View attachment 146648


And a pix of just normal driving temps.

View attachment 146649

Interesting, towing a 28' enclosed car hauler weighing about 8K lbs. The coolant was 215-220, trans stayed under 200 and the oil was 230-240 in 85-90 degree temps. Two different engine platforms, almost identical temps...it's like they engineered it that way [emoji44]

 

[JS1500]

What is your transmission temp when your coolant temp is 219? You guys with the 8 speed have a cluster **** known as the thermal bypass valve that is mated with your tranny. It is supposed to shut off and turn on yada yada to get the transmission at a perfect temp, but as we have seen on this forum it is horse ****. Some guys run religiously at 180f, and some others run religiously at 225f. I know the coolant heats the transmission oil in the name of fuel efficiency by heating the oil it makes it move faster and the epa says that is a good feature to have in a truck and FCA agreed, but I don't know if it can cool the transmission that would by default heat the coolant.

My transmission runs anywhere from 176*-181*. When the coolant is higher the transmission is usually around 179*.

 

[Burla]

All is normal with your truck.

 

[hualai]

Mine without towing ina 4.000 miles engine reads 224.6