Overheating issues 2023 JL

[Willys41]

The cool thing about that fan controller is that you can ask him to modify the programming to allow for the engine to run a little warmer (but still cooler than factory).

I got one as last year we had 90something days above 100 degrees and I'm just trying to give my jeep all the help it can get to survive that heat. Especially with the slow ranch/beach driving i do.

I am glad to see someone else is taking advantage of the RPM fan controller.
An added benefit to the fan controller is keep air movement in the engine compartment.
Pushing out the extreme hot air the that the exhaust manifolds and catalytic converts produce.

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[Ratbert]

Just compare other vehicles temps to the jeep wrangler. They are not running 235 and higher range
Here is a great example
The Maserati 3.0 v6 is the same motor as the the jeep 3.6 put a smaller displacement
Maserati 3.0 v6 runs at 195 degrees and also uses 5w40 oil
I will let you decide witch temp is better for your jeep motor
235+ or 195
I chose 195

@Willys41, how is that video related to this topic? Does it in some way indicate that lower thermometer settings are better than what Jeep's engineers chose?

Asking for someone that apparently wasted nearly 46 minutes of their life blindly trying to find your point.

 

[Willys41]

@Willys41, how is that video related to this topic? Does it in some way indicate that lower thermometer settings are better than what Jeep's engineers chose?

Asking for someone that apparently wasted nearly 46 minutes of their life blindly trying to find your point.

The Maserati 3.0 v6 runs at 195 degrees coolant temp.
So you have to ask why dose Maserati run at 195 and the jeep 3.6 run as high as 235 or higher
They also use 5w40 oil
Is it because Maserati doesn't have the MPG mandates like the USA and chooses to do whats best for the motor
With every mod that I have made larger tires / lower gearing / more wight and so on I have seen a steep rise in coolant and oil temps
With a lot of testing different option I found that the rad. fan comes on to little to late
With the RPM Extreme JL fan controller all high temps are gone. Problem solved
I now run at an average of 195 temp like the Maserati 3.0 and also changed from 5w30 to 5w40 oil

 

[OrneryBear]

Personally I would not be changing the operational temp range without knowing what range the engine was designed for. It is entirely possible to over cool an engine. There is a reason you should let an engine come up to temperature before working it hard. Tolerances and clearances change with temp, that includes cooling. Metal properties changes with temp, that includes cooling. I do this sort of thing for a living both working with metals and plastics, and a temp swing of 20-30 degrees can really affect the dimensional tolerances of metal components.

This is exactly the same as the oil weight discussions. Without knowing the intended design spec and criteria for that spec, it's hard to make an informed decision.

Comparing the 3.6 to the masserati 3.0 is still apples to oranges because you don't know the engineering specifications and where they differ.

 

[jav_eee]

Personally I would not be changing the operational temp range without knowing what range the engine was designed for.

in the service manual, under the oil pressures section, it says “values in table are valid for temperatures between 89-100°C (192-212°F).

would it be safe to assume that those temps are the operational temp range the engine was designed for?

 

[OrneryBear]

in the service manual, under the oil pressures section, it says “values in table are valid for temperatures between 89-100°C (192-212°F).

would it be safe to assume that those temps are the operational temp range the engine was designed for?

I would have to see the table in context, but from that wording it doesn't sound like that is the operation temp range of the engine and just a temp range for the sensor values being valid, diagnosed, or something. Without context for that I can't say what that is.

 

[Willys41]

Personally I would not be changing the operational temp range without knowing what range the engine was designed for. It is entirely possible to over cool an engine. There is a reason you should let an engine come up to temperature before working it hard. Tolerances and clearances change with temp, that includes cooling. Metal properties changes with temp, that includes cooling. I do this sort of thing for a living both working with metals and plastics, and a temp swing of 20-30 degrees can really affect the dimensional tolerances of metal components.

This is exactly the same as the oil weight discussions. Without knowing the intended design spec and criteria for that spec, it's hard to make an informed decision.

Comparing the 3.6 to the masserati 3.0 is still apples to oranges because you don't know the engineering specifications and where they differ.

The 3.6 has a 190 degree thermostat and at 212 it is fully open. In cold climates with the heater running you will never see much above 212

 

[Tncdrew]

in the service manual, under the oil pressures section, it says “values in table are valid for temperatures between 89-100°C (192-212°F).

would it be safe to assume that those temps are the operational temp range the engine was designed for?

And I've seen Ram 1500 owners that report these lower temps are the norm... for the same 3.6L (albeit slightly more HP).

Why? Because of less packaging constraints, and a more effective cooling system ?

 

[jav_eee]

I would have to see the table in context, but from that wording it doesn't sound like that is the operation temp range of the engine and just a temp range for the sensor values being valid, diagnosed, or something. Without context for that I can't say what that is.

 

[UncleJimmy]

I'm sure that the high temps of these engines are what they were designed at for emissions purposes, but IMO they're just too high. There are so many plastics underhood that would likely see a lot longer lifespan with lower temps.
I mean, on a hot (or even not so hot) day, you can hardly touch things under the hood, they're so hot!
It's kinda ridiculous!

I agree. I suspect CAFE related as well, even though it's electrical, it cost fuel to boost the alternator out put to charge the battery. For reference, my Tundra runs 182-192F typical.

pulled into a light and stopped, ess did not kick in with a/c on, temp was 221, fan quietly started for 10 seconds, temp went right back down to 217, fan shut off.

While I like the rpm fan controller as a concept, I am definitely not getting anywhere close to splice factory wiring harness while under a 6 year bumper to bump warranty.

I am using Tazer to manually operate the fan. I will be posting a new thread asking for members to submit a feature request to them to offer a user programable threshold similar to RPM. No additional cost to those who own the Tazer, no cutting wires or additional purchase.

 

[UncleJimmy]

I also got the extended warranty (mistake)
With all my mods there is no way in hell the the dealer is going to warranty any thing on my Jeep
After the second free oil change and oil dripping from the bottom of my jeep it was the last time it will ever see a dealer for repairs. Its all on me
I will do what ever it takes to correct what the engineers F--up and that includes the fan controller

Have you contacted them about cancelling the warranty and refunding you? I don't know which warranty you have but some have provisions where they will prorate and return some funds.

 

[jav_eee]

And I've seen Ram 1500 owners that report these lower temps are the norm... for the same 3.6L (albeit slightly more HP).

Why? Because of less packaging constraints, and a more effective cooling system ?

Willys41 words on the spacing of the radiator and all that make sense. I’ve noticed higher coolant temps (continuously climbing) while cruising down the road, in an instance where you’d think passive airflow would cool the radiator until what I can only imagine is the fan turning on that eventually makes them come back down. Once it cools the cycle repeats itself.

 

[Tncdrew]

That Jalopnik article posted a few pages back really describes well the cooling challenges the engineers were faced with regarding packaging... yes its about the JT, but they're basically the same.

 

[mwilk012]

The Maserati 3.0 v6 runs at 195 degrees coolant temp.
So you have to ask why dose Maserati run at 195 and the jeep 3.6 run as high as 235 or higher
They also use 5w40 oil
Is it because Maserati doesn't have the MPG mandates like the USA and chooses to do whats best for the motor
With every mod that I have made larger tires / lower gearing / more wight and so on I have seen a steep rise in coolant and oil temps
With a lot of testing different option I found that the rad. fan comes on to little to late
With the RPM Extreme JL fan controller all high temps are gone. Problem solved
I now run at an average of 195 temp like the Maserati 3.0 and also changed from 5w30 to 5w40 oil

So you’re just going to ignore the fact that you’re wrong about this? The Maserati has a HIGHER temp thermostat. Not lower.

 

[Ratbert]

The Maserati 3.0 v6 runs at 195 degrees coolant temp.
So you have to ask why dose Maserati run at 195 and the jeep 3.6 run as high as 235 or higher
They also use 5w40 oil
Is it because Maserati doesn't have the MPG mandates like the USA and chooses to do whats best for the motor
With every mod that I have made larger tires / lower gearing / more wight and so on I have seen a steep rise in coolant and oil temps
With a lot of testing different option I found that the rad. fan comes on to little to late
With the RPM Extreme JL fan controller all high temps are gone. Problem solved
I now run at an average of 195 temp like the Maserati 3.0 and also changed from 5w30 to 5w40 oil

Hopefully you realize that the video says nothing about any of that. It merely shows the commonality between the two. You seem to be using speculation while implying that the video says something that it very much does not.

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