Coolant temp overheat

[ScotM]

The coolant would have most likely been contaminated from the last few times you drove the jeep. You did your diligence by waiting for the whole system to come up to temperature, so any contamination should be picked up by the kit.

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[jimim]

The coolant would have most likely been contaminated from the last few times you drove the jeep. You did your diligence by waiting for the whole system to come up to temperature, so any contamination should be picked up by the kit.

Ok cool. Ok so I’m out. I’ll watch my temps when driving during the days. Man knows I live in that damn Jeep. lol I’ll check the level each morning before I leave for work and just let it ride. I’m feeling way more confident I’m in the clear. Prob is a very very slow leak that comes and goes with expansion and contraction and it went down little at a time over a long period of time. Who knows. But I think I’m confident the engine is ok.

 

[jimim]

Hey I just want to say thanks sooooo much for this community and all you who have helped me so much past few days. It’s so appreciated!

 

[jimim]

AM vs yesterday.

 

[ScotM]

could be the angle, but that looks a little lower.

 

[jimim]

could be the angle, but that looks a little lower.

Top is actually this morning so the top one is higher vs yesterday which looks a tad lower. So since Friday there are pics which go from monday down to Friday

 

[jimim]

Monday first pic. Sunday second. Saturday third. Friday last pic.​

 

[ScotM]

That does look good.

Friday to Monday​

 

[jimim]

That does look good.

so in my eyes i see no issue with levels. first day high second and third day a bit down but today back to higher like first day. all at same temp in my garage. not started for the day yet.

if i was burning coolant getting into the engine or had a crack or leak going into the engine would i see a difference in level by now you think. i know that's hard to say but in your opinion or anyone elses opinion?

 

[ScotM]

I think you’re doing great. Just keep in monitoring mode

 

[AVGeek99]

Glad I found this tread. I've been lurking since late last week.

So my situation. I have a 2025 2.0T, got it in June, brand new. Since I got it I noticed that it ran pretty warm, similar to my 2021 Pentastar typically ranging from 200-220, sometimes up to 2025 in normal driving.

At the beginning of Oct we moved from MN to CO Springs. I towed a 12 ft U-Haul trailer behind my Jeep with some of our more fragile and/or valuable items. It was filled floor to ceiling (about 5.5 ft) front to back. The Jeep towed it like a champ. I took the interstate until about the last 150 miles.

The last 60 miles from Limon, CO to Peyton, where we live, the drive on US24 is very hilly constantly going up and down and gaining about 2000 ft in elevation. Some of the hills were long with steeper sections, typically near the top. On the first long steep climb I glanced down at the dash and notice my temp guage was above the normal range. I quickly checked the coolant temp, it was 245 and climbing. I immediately let off the gas and the temp stopped climbing and a few seconds later it started dropping. I crested the hill and the temp continued to drop to the nomral range around 200. The outside temp that day was mid to upper 80s.

I monitored the coolant temp very closely until we arrived. It reached 235 a few more times on the the steeper longer climbs. I was a bit surprised and a little conerned about the high temps but chalked this up to the Jeep working hard towing the trailer; I was holding a steady 65mph on those climbs.

I occasionally monitor the coolant temp and it is typically in the "normal" 200 to 220 range. Then I found this thread late last week. I immediately checked the black coolant reservoir and it was indeed low. I picked up some antifreeze (Zerex G30) Friday night and filled it Saturday morning, adding a bit less than a quart.

Then on Saturday my wife and I did some light offroading. We did Mt Baldy. The trail is about 90 minutes from our house, about 40 minutes on paved roads through CO Springs, and then about another 50 minutes on gravel roads through the mountains. The gravel roads are windy so speed ranges from about 15 to 30 or so and you gain a few thousand feet of elevation. The air time was mid to upper 50s the whole day. I monitored the coolant temp closely.

Through the entire drive up to the trail, and on the trail itself the temp would climb up to about 225, then the fan would kick in and the temp would drop into the 190s and the fan would turn off. Then back up to 225, then the fan, dropping to 190s... pretty much the entire day.

Is this normal? Should it be doing this when it's only in the mid 50s? I know on the trail, you're going slow so not a lot of air passing through the radiator, and working the engine harder so it's not uncommon. But for the whole drive up? Should I be concerned?

I finally remembered to check the coolant again today and it is at the same level I filled it to on Saturday morning, so coolant level is good. I have a winch, but it sits down in the bumper so it blocks very little if any air flow.

The only potential issue I can think of is in August we took a trip to the UP MI and did did some eaisy trails. There was a lot of big (Jeep size or bigger) puddles. I didn't do any full sends but there were a few times that a little (more wanter than mud) splashed up onto the hood. I wonder if I got a little mud in the fins of the radiator? I'm going to clean it out with the garden hose this weekend, but I really don't think it should be that bad. I learned my lesson with going too fast through much in my 2021 and I filled the fins up with mud which caused severe overheating, so I now purposely avoid doing that.

Sorry for the long post.

Is this completely normal?

 

[EbyCreek]

Glad I found this tread. I've been lurking since late last week.

So my situation. I have a 2025 2.0T, got it in June, brand new. Since I got it I noticed that it ran pretty warm, similar to my 2021 Pentastar typically ranging from 200-220, sometimes up to 2025 in normal driving.

At the beginning of Oct we moved from MN to CO Springs. I towed a 12 ft U-Haul trailer behind my Jeep with some of our more fragile and/or valuable items. It was filled floor to ceiling (about 5.5 ft) front to back. The Jeep towed it like a champ. I took the interstate until about the last 150 miles.

The last 60 miles from Limon, CO to Peyton, where we live, the drive on US24 is very hilly constantly going up and down and gaining about 2000 ft in elevation. Some of the hills were long with steeper sections, typically near the top. On the first long steep climb I glanced down at the dash and notice my temp guage was above the normal range. I quickly checked the coolant temp, it was 245 and climbing. I immediately let off the gas and the temp stopped climbing and a few seconds later it started dropping. I crested the hill and the temp continued to drop to the nomral range around 200. The outside temp that day was mid to upper 80s.

I monitored the coolant temp very closely until we arrived. It reached 235 a few more times on the the steeper longer climbs. I was a bit surprised and a little conerned about the high temps but chalked this up to the Jeep working hard towing the trailer; I was holding a steady 65mph on those climbs.

I occasionally monitor the coolant temp and it is typically in the "normal" 200 to 220 range. Then I found this thread late last week. I immediately checked the black coolant reservoir and it was indeed low. I picked up some antifreeze (Zerex G30) Friday night and filled it Saturday morning, adding a bit less than a quart.

Then on Saturday my wife and I did some light offroading. We did Mt Baldy. The trail is about 90 minutes from our house, about 40 minutes on paved roads through CO Springs, and then about another 50 minutes on gravel roads through the mountains. The gravel roads are windy so speed ranges from about 15 to 30 or so and you gain a few thousand feet of elevation. The air time was mid to upper 50s the whole day. I monitored the coolant temp closely.

Through the entire drive up to the trail, and on the trail itself the temp would climb up to about 225, then the fan would kick in and the temp would drop into the 190s and the fan would turn off. Then back up to 225, then the fan, dropping to 190s... pretty much the entire day.

Is this normal? Should it be doing this when it's only in the mid 50s? I know on the trail, you're going slow so not a lot of air passing through the radiator, and working the engine harder so it's not uncommon. But for the whole drive up? Should I be concerned?

I finally remembered to check the coolant again today and it is at the same level I filled it to on Saturday morning, so coolant level is good. I have a winch, but it sits down in the bumper so it blocks very little if any air flow.

The only potential issue I can think of is in August we took a trip to the UP MI and did did some eaisy trails. There was a lot of big (Jeep size or bigger) puddles. I didn't do any full sends but there were a few times that a little (more wanter than mud) splashed up onto the hood. I wonder if I got a little mud in the fins of the radiator? I'm going to clean it out with the garden hose this weekend, but I really don't think it should be that bad. I learned my lesson with going too fast through much in my 2021 and I filled the fins up with mud which caused severe overheating, so I now purposely avoid doing that.

Sorry for the long post.

Is this completely normal?

Yes, very normal. In my opinion the easiest way to fix this is to install the RPM Extreme Fan Controller.
https://www.rpmextreme.com/

Factory Fan Settings

203* t-stat starts to open

206* t-stat if fully open

226* fan starts to run

235* fan on full

250* limp mode



RPM Extreme Fan Controller

195 degrees = 15%

199 degrees = 30%

205 degrees = 50%

212 degrees = 75%

218+ degrees = 100%

 

[Heimkehr]

I have a 2025 2.0T, got it in June, brand new. Since I got it I noticed that it ran pretty warm...typically ranging from 200-220, sometimes up to 225 in normal driving.

I've a 2021 JLU w/the 2.0T. The coolant temperature trend exceeds 200°F only infrequently, no matter the time of year and then only if I'm climbing a grade or towing the loaded motorcycle trailer in the heat of summer. It may increase a bit if I really press my right foot down, too, but that's understood. Lifting my foot then causes the number to go back down as expected.

If I saw the bolded numbers during daily, steady-state driving, that'd be cause for immediate concern, if only because after 5 years of ownership they'd be outliers.

Possibly the owner's driving habits, and/or frequency of elevation changes during everyday driving, has an effect here.

 

[AVGeek99]

Yes, very normal. In my opinion the easiest way to fix this is to install the RPM Extreme Fan Controller.
https://www.rpmextreme.com/

Factory Fan Settings

203* t-stat starts to open

206* t-stat if fully open

226* fan starts to run

235* fan on full

250* limp mode



RPM Extreme Fan Controller

195 degrees = 15%

199 degrees = 30%

205 degrees = 50%

212 degrees = 75%

218+ degrees = 100%

I've seen many posts about the RPM Extreme Fan conroller. I've given it some thought, haven't made up my mind.

 

[EbyCreek]

It’s simple and it just works. It’s in my top 3 favorite mods. It’s keeps everything 25 degrees cooler. I probably could of saved a coupe of power steering pumps if I had installed it sooner.

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