Diesel cooling options and ideas

[22EcoDs]

No company has a solid fix for this yet?

Nope, they're working on it.

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[@californiajeeping]

I am almost to purchasing....Run a two core cold case aluminum radiator and also drill some holes in the thermostat to get the "idle" or "running" temp down prior to the temp spiking. If I see 250 oil im at 228+ coolant. If we get the coolant down to 200 I dont see how the oil that splashes on a 200 degree engine could be 250 with an oil cooler right?

I think this is going to be a winter project unfortunately.

 

[Sandevino]

No issues with mine when I had it. Diesel‘s need heat for efficiency and the EPA loves them some efficiency all else be damned.

The first thing I did when I got mine was remove the check valve in the oil cooler allowing the oil to flow through without hitting the 235-240 degree mark.

Hot oil equates to hot cylinders which helps efficiency.

Go buy a spare and experiment.

 

[@californiajeeping]

No issues with mine when I had it. Diesel‘s need heat for efficiency and the EPA loves them some efficiency all else be damned.

The first thing I did when I got mine was remove the check valve in the oil cooler allowing the oil to flow through without hitting the 235-240 degree mark.

Hot oil equates to hot cylinders which helps efficiency.

Go buy a spare and experiment.

Can you clarify the check valve that was removed?

 

[PJZ]

Some observations from a drive LA to PHX. No science here, just what I noticed. My bumper has huge lights in front and I keep assuming it is blocking the air flow and cooling capacity. Drove to Phx last week in 115ish temps along the way. Running 75 on cruise the oil temp hovers in the 235 - 237 range. Accelerating to pass wold push the temp up quickly.

Got to Phx, removed the lights, made the drive back. Similar temps or higher in some areas, cruise on 75 and the same oil temps. Accelerating to pass wold push the temp up quickly just as before.

Both trips I would kick on the fans with the Tazer and it lowers the oil temps considerably.

No derating or other issues on the trip.

In general I didnt see any reduction in temps with increased air flow. There is still a lot going on in the front of the grill, but removing the lights and opening up the air flow didnt change anything. The computer is keeping things hot just as noted in many of the posts here.

Lots of chatter about adding the new '24 grill. Cant imagine that would change anything, at least on the diesel. Stating the obvious that the solution needs to be mechanical, oil cooler bigger radiator, all the solutions noted in the thread.

 

[22EcoDs]

https://bulletproofdiesel.com/products/bulletproof-supplemental-cooling-system-2021-2023-jeep-diesel

 

[bl1ndman]

https://bulletproofdiesel.com/products/bulletproof-supplemental-cooling-system-2021-2023-jeep-diesel

Is it just my eye, or will this not be compatible with a winch?

 

[MF Comics]

https://bulletproofdiesel.com/products/bulletproof-supplemental-cooling-system-2021-2023-jeep-diesel

Pair that with deletes, and should be on the right step to being golden

Is it just my eye, or will this not be compatible with a winch?

Good question, could also make mods to make both work

 

[OrangeCJ]

In June/July we did a road trip. Las Vegas, the Canyon, California Liquor shopping.

We derated and shutdown just outside of Tonopah NV, going about 75 mph, 4 people, 2 suitcases and a cooler... Dash lit up with drivetrain ane throttle control errors and vehicle slowed down to approx 30 MPH... we had to pull over and let it cool down. I was not driving, but I was monitoring the Oil temp, 248 when the derate started. Not sure if it when any higher as it was a pretty sketchy situation trying to help the wife navigate off the road safely in the middle of nowhere. Side note... I switched to that Premium Blue Def for the trip since some people mentioned they thought that might help...

Again, as I have said before, these trucks should be able to haul some people and luggage...

It was hot here yesterday, 105... I saw the oil temp at 239 just going 60 on the freeway...

Since I had the shutdown in NV it flagged Jeep and they asked me to bring the truck in for service... I am doubtful they will do anything as they will not be able to "reproduce" the situation.

Just sharing my experience, as mine seems to be an exception... Although it is very similar to may Dads experiences with his JL Diesel. Since we are both in the Pac Northwest, I keep going back to a Tune, or some issue with the vehicle adjusting to elevation and fuel mix ratio.

Based on my experience I can' see how some of you are seeing the temps you are without a derate.

 

[rharr]

i removed all the engine insulation, and hood gaskets, and engine cover. after that the engine oil temp goes higher. my theory is all that crap holds heat which prematurely trips a sensor.

 

[22EcoDs]

In June/July we did a road trip. Las Vegas, the Canyon, California Liquor shopping.

We derated and shutdown just outside of Tonopah NV, going about 75 mph, 4 people, 2 suitcases and a cooler... Dash lit up with drivetrain ane throttle control errors and vehicle slowed down to approx 30 MPH... we had to pull over and let it cool down. I was not driving, but I was monitoring the Oil temp, 248 when the derate started. Not sure if it when any higher as it was a pretty sketchy situation trying to help the wife navigate off the road safely in the middle of nowhere. Side note... I switched to that Premium Blue Def for the trip since some people mentioned they thought that might help...

Again, as I have said before, these trucks should be able to haul some people and luggage...

It was hot here yesterday, 105... I saw the oil temp at 239 just going 60 on the freeway...

Since I had the shutdown in NV it flagged Jeep and they asked me to bring the truck in for service... I am doubtful they will do anything as they will not be able to "reproduce" the situation.

Just sharing my experience, as mine seems to be an exception... Although it is very similar to may Dads experiences with his JL Diesel. Since we are both in the Pac Northwest, I keep going back to a Tune, or some issue with the vehicle adjusting to elevation and fuel mix ratio.

Based on my experience I can' see how some of you are seeing the temps you are without a derate.

Derates from cooling package temps occur at ~235 coolant and ~265 oil from what I have been told by reputable sources. I suspect you had something else wrong or your coolant was meeting that number. Def wouldn't cause this to my knowledge. Did you pull codes?

 

[OrangeCJ]

Derates from cooling package temps occur at ~235 coolant and ~265 oil from what I have been told by reputable sources. I suspect you had something else wrong or your coolant was meeting that number. Def wouldn't cause this to my knowledge. Did you pull codes?

Yeah I wrote them down... but I need to find them... They codes were related to a engine malfunction and electronic throttle control.

Thanks for the temp numbers you mentioned, I have never seen any of my numbers go that high, and I have experienced 5 derates... Only 3 put me and the family in serious danger on the freeway.

Maybe I should put the foam back on the engine and see if things run cooler

 

[CrazyCooter]

Yeah I wrote them down... but I need to find them... They codes were related to a engine malfunction and electronic throttle control.

Thanks for the temp numbers you mentioned, I have never seen any of my numbers go that high, and I have experienced 5 derates... Only 3 put me and the family in serious danger on the freeway.

Maybe I should put the foam back on the engine and see if things run cooler

I think your throttle control code issues and the overheating derates we're talking about are different scenarios.

In the 46K miles I have driven/towed with my truck, I have never gotten a code, but 100's of derates.

 

[OrangeCJ]

I think your throttle control code issues and the overheating derates we're talking about are different scenarios.

In the 46K miles I have driven/towed with my truck, I have never gotten a code, but 100's of derates.

I thought I saw previous references to the "Christmas Tree" of lights on the dash some people have seen when derating, but I can't seem to find it now.

Normally when it has derated there is nothing on the dash, but this time the truck actually would not recover, and the dash did look like a Christmas Tree. IDK seems like my results are different than most... I am the LUCKY WINNER!

I still think @NCJL was onto something with the heat shield around the wire loom, but I didn't get to it before our trip, sadly.

 

[CrazyCooter]

I thought I saw previous references to the "Christmas Tree" of lights on the dash some people have seen when derating, but I can't seem to find it now.

Normally when it has derated there is nothing on the dash, but this time the truck actually would not recover, and the dash did look like a Christmas Tree. IDK seems like my results are different than most... I am the LUCKY WINNER!

I still think @NCJL was onto something with the heat shield around the wire loom, but I didn't get to it before our trip, sadly.

Yes, have a look at the heat shielding along the frame under the passenger's foot. I had a truck in the shop where the harness was touching. Then after I moved it, I got error codes for the transmission shifter? 4 of 5 trucks I've looked at have been OK.

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