Diesel cooling options and ideas

[@californiajeeping]

Airflow only does so much if you can’t remove the BTU’s I’ve read on FB that people turn the cooling fans on when towing even on the highway and it helps. That tells me either the radiators can’t shed the BTU with normal airflow through the grill or the radiator is inadequate. It is the same as a 3.6l with a intercooler in front of it. We need a 2-3 row aluminum option. Preferably cross flow.

Sponsored

 

[ZoneArc]

I have no foam, no skids, opened vents and added rams in place of the factory Rubi vents, snorkel to pull air from outside the engine compartment, added an oil cooler using insane diesel's cap, vented inner fenders, and I'll still get to 255 oil temps and 250 engine temps when I run it above 2600 Rpms when towing. In my case that's 65mph towing a 4500lb trailer since I'm on 40" tires on 4.88s.

 

[CrazyCooter]

Airflow only does so much if you can’t remove the BTU’s I’ve read on FB that people turn the cooling fans on when towing even on the highway and it helps. That tells me either the radiators can’t shed the BTU with normal airflow through the grill or the radiator is inadequate. It is the same as a 3.6l with a intercooler in front of it. We need a 2-3 row aluminum option. Preferably cross flow.

Turning the fan on does make a little difference which just made me think the blades were blocking when they aren't spinning. Doesn't keep it from overheating though.

Here's your 2 row crossflow radiator: https://www.coldcaseradiators.com/product/18-20-jeep-wrangler-jl-aluminum-performance-radiator

No claims that it will cure the problem though. I called them last year and the tech advised me NOT to install that radiator for fear of voiding any engine or cooling component warranty. Who knows what that outcome could be........

 

[NC_Overland]

I have no foam, no skids, opened vents and added rams in place of the factory Rubi vents, snorkel to pull air from outside the engine compartment, added an oil cooler using insane diesel's cap, vented inner fenders, and I'll still get to 255 oil temps and 250 engine temps when I run it above 2600 Rpms when towing. In my case that's 65mph towing a 450lb trailer since I'm on 40" tires on 4.88s.

450 lb or 4500 lb? I tow a trailer a lot that’s around 1500 lbs empty. I can’t even hardly tell it’s back there except for the occasional slight tug if I hit a pot hole or something. 3.6l, not diesel. I’m mentioning it because the diesel should be way better at towing.

 

[@californiajeeping]

I have no foam, no skids, opened vents and added rams in place of the factory Rubi vents, snorkel to pull air from outside the engine compartment, added an oil cooler using insane diesel's cap, vented inner fenders, and I'll still get to 255 oil temps and 250 engine temps when I run it above 2600 Rpms when towing. In my case that's 65mph towing a 450lb trailer since I'm on 40" tires on 4.88s.

I think the bypass cooler and oil filter should be converted to full flow. Then remove the stock heat exchanger because it’s basically a oil heater at that point.

 

[ZoneArc]

450 lb or 4500 lb? I tow a trailer a lot that’s around 1500 lbs empty. I can’t even hardly tell it’s back there except for the occasional slight tug if I hit a pot hole or something. 3.6l, not diesel. I’m mentioning it because the diesel should be way better at towing.

4500lbs. Sorry.

 

[NC_Overland]

4500lbs. Sorry.

Ok. I was about to say. This diesel is complete garbage. Hah

 

[Rusty PW]

Found this article about the engineering in the cooling system.

https://jalopnik.com/the-engineering-behind-the-jeep-gladiators-tow-rating-1833657453

 

[Mr._Bill]

Found this article about the engineering in the cooling system.

https://jalopnik.com/the-engineering-behind-the-jeep-gladiators-tow-rating-1833657453

That's an excellent article that all JT owners should read, especially if they Tow or have the diesel. I remember reading that after buying my truck years ago.

 

[mrmo]

So....will the higher rated max tow fan fit into a standard Sport w the diesel? That may be a start, with the strategy in the PCM or stand alone controller to run a larger fan at a designated temp (thermostat driven)

 

[CrazyCooter]

So....will the higher rated max tow fan fit into a standard Sport w the diesel? That may be a start, with the strategy in the PCM or stand alone controller to run a larger fan at a designated temp (thermostat driven)

Pretty sure we established in the past that the diesel already has the 850 watt fan.

 

[Escape.idiocracy]

I think the bypass cooler and oil filter should be converted to full flow. Then remove the stock heat exchanger because it’s basically a oil heater at that point.

I agree with this post. We ran a fairly hot tune on a wildcatxx sxs for DP4. Hammering down in ambient temps above 100* we were over heating quite a bit- started with a huge aluminum radiator with the largest cfm fans we could find. This helped- but helped push the problem. Still over heated but over heated later… we then jumped to a larger oil sump- (in heinsight this was obviously going to do the same as the radiator…. More oil just takes longer to heat up…?- the aluminum sump was still nice ?)
We finally added this between the motor and sump on the return side:

Derale 15845 Hyper Dual-Cool Remote Cooler https://a.co/d/7DvmRdp

For the sxs application, we threw it on a toggle switch and as soon as oil hit 215 and we were racing- turned it on…. Oil temps would get warm but stayed under 230.

The crappy part about what we are working with on the Jeep is minimal space, no external cooler…. And a warranty that most want to maintain.

I have seen one person ( https://www.jeepgladiatorforum.com/forum/threads/bypass-filter-and-cooler-install.54743/ ) that has added a bypass oil filter setup, and within the bypass has a cooler. The only thing I see with this is bypass isn’t cooling the majority of the oil….
If we can find a location to tap into the system for an oil cooler line. The same cooler could be added along with a thermo switch.

My thoughts….


Edit: I have heard that bulletproof is working on a couple things for the gladiator diesels. I saw they recently released the EGR cooler….. maybe if we are lucky they will kick out an oil cooler option. Just hope it isn’t as pricey as when they kicked something out for the power stroke back in the day…

 

[@californiajeeping]

we already have the high powered fan. The radiator is the same as a 3.6L.

The JL wrangler shares radiator and fans across the 392/3.0L/3.6L.

The cleanest setup would be to run a oil cooler bypass plate. Use the engines oil pump to push oil through an external oil cooler with fans and then run a large 2-3 row radiator.

Doing that under warranty is a pain in the butt.

 

[Escape.idiocracy]

The cleanest setup would be to run a oil cooler bypass plate. Use the engines oil pump to push oil through an external oil cooler with fans

So- where do you hook this up at? ?

 

[@californiajeeping]

I think a company may make a plate for this:

https://www.sofakingtuned.com/store/p47/ecodieseloilplateadapter.html#/

Sponsored