Diesel cooling options and ideas

[SquirrelChaser]

I've had mine derate on moderate hills in Texas when it's above 90f. https://www.jeepgladiatorforum.com/...latform-wish-there-was-a-return-policy.46233/

Elevation doesn't matter, it's the ambient temp and load the engine is under. I overheated climbing out of Death Valley where the climb started below sea level.

Wow, not the answer I was hoping for. I may need to pause and see if there is a fix or update to the 2022. I Really want the diesel, but will be towing a ~ 5,000 lbs camper 2-3 times a year. It's sad that the factory can't handle the issue, but I would still pull the trigger if there was an aftermarket fix.

Sponsored

 

[CrazyCooter]

Wow, not the answer I was hoping for. I may need to pause and see if there is a fix or update to the 2022. I Really want the diesel, but will be towing a ~ 5,000 lbs camper 2-3 times a year. It's sad that the factory can't handle the issue, but I would still pull the trigger if there was an aftermarket fix.

I began noticing there was a heat issue once I started traveling with temps over 80° in hilly country with only a 2,000 lb trailer.

 

[Bulldog10]

Has anyone researched these!? RunCool Hood Louvers - Hood Vents For Your Vehicle - Cool Your Engine

 

[ChimeraJT]

Just saw a post about a "H.E.R.O." (Heat Expulsion, Ram Opening) hood over on the JL forum.

https://www.jlwranglerforums.com/fo...3-0l-ecodiesel-why-why-not.72045/post-1506477

Direct link to the hood: http://totlinnovations.com/jl-h-e-r-o-hood/

Says it's compatible with JL and JT Diesels.

Just wanted to get it in this thread as an option to discuss. I'll let someone more knowledgeable than I comment on the possible effectiveness.

Edit: Adding some images from their site:

 

[staying_tuned]

This is how I will determine

Just saw a post about a "H.E.R.O." (Heat Expulsion, Ram Opening) hood over on the JL forum.

https://www.jlwranglerforums.com/fo...3-0l-ecodiesel-why-why-not.72045/post-1506477

Direct link to the hood: http://totlinnovations.com/jl-h-e-r-o-hood/

Says it's compatible with JL and JT Diesels.

Just wanted to get it in this thread as an option to discuss. I'll let someone more knowledgeable than I comment on the possible effectiveness.

This looks quite elegant and I love that the vents are designed as not to auto fog the windshield. I don’t even plan to tow much at all but this, along with a simple inline oil cooler, seems like it would mitigate most if not all of the issues without having to perform surgery.

Emailed them to see if they’d be open to a group buy at 10+ units for 20% off.

 

[ShadowsPapa]

This is mostly gas engine talk, normally aspirated engines - but higher elevation has often been a cause of engine over-heating.
Two reasons, especially for NA engines - the air is thinner, it lowers your compression and combustion camber pressures, you get less power (and that's the reason you can use lower octane fuel in gasoline engines). You need more throttle to compensate, the engine is working harder.

I've been thinking that maybe you have fewer molecules being blown past the tubes of the radiator - less air to absorb and carry away the heat.

So there's two reasons for a normally aspirated gas engine to suffer over-heating at altitude.
How that impacts a diesel that's having air forced in - well, maybe similar because the turbo can't pack the cylinders like it would at lower altitude.

I don't know how efficient the turbos are on these engines.

The fact over-heating happens at sea level or below speaks to something abnormal going on in those cases. Engine should be making peak power.
But then with the ambient air temp being high you can't pull out as much heat energy as the air already has a lot.

Does any of that apply to the diesel??

 

[staying_tuned]

@ShadowsPapa what are your thoughts on the hood above? I hate to call you out man but it would be great to hear what you think. Aero means of heat extraction is purely witchcraft to me despite rereading the pressure discussion points a few times.

 

[am1978]

Thanks for putting in the work to collect this data for us. Your findings confirm what I would have expected, and I agree the most effective place for vents would be the forward area of the hood.

-TJ

Not on the Rubi hood.

 

[Chance575]

The Ford Gt photo is completely useless in this. That is a mid engine car. The radiator is set leaning forward just like a C7 corvette. Air is brought in through the lower grill area and through the radiator and exits the front hole on the hood. On the corvette it keeps the heat out of the engine bay and drag down when the air flow goes over the car at that point.

now if you want to lean the radiator forward, push out the grill and make a large air duct for this that will work quite fine

https://mobile.corvettestory.com/2014-corvette-technology.php

 

[redrider]

The elephant in the room is water intrusion. Depending on location, fuse blocks, batteries and the like do not care for excessive moisture. I like the forward hood location if the electricals are kept dry and the open side vents would keep rain water out. So let us ask the experts!-those folks who already modded their CJ/YJ/TJ/JK/WJ etc.

 

[yolo]

The elephant in the room is water intrusion. Depending on location, fuse blocks, batteries and the like do not care for excessive moisture. I like the forward hood location if the electricals are kept dry and the open side vents would keep rain water out. So let us ask the experts!-those folks who already modded their CJ/YJ/TJ/JK/WJ etc.

I feel the same. I ordered a set of hood scoops (well, back-ordered anyway) because they come with silicone plugs. That way I can plug them up during fording, car washes, etc. The scoops are a shot in the dark, but hoping they help.

 

[jeepin48]

I

I feel the same. I ordered a set of hood scoops (well, back-ordered anyway) because they come with silicone plugs. That way I can plug them up during fording, car washes, etc. The scoops are a shot in the dark, but hoping they help.

Down side of those are they create pressure under the hood which will make less air flow through the radiator. They should be mounted backwards so they suck air out of the hood. I'm considering those as well to turn them backwards.

 

[Pike1892]

I feel the same. I ordered a set of hood scoops (well, back-ordered anyway) because they come with silicone plugs. That way I can plug them up during fording, car washes, etc. The scoops are a shot in the dark, but hoping they help.

Do you think the hood scoops with mesh/ vented inner fenders will get enough heat out of the engine bay and help flow more air through. It's so tight in the engine bay that I don't think air is flowing/ escaping after it has passed through the radiator.

 

[yolo]

I

Down side of those are they create pressure under the hood which will make less air flow through the radiator. They should be mounted backwards so they suck air out of the hood. I'm considering those as well to turn them backwards.

Maybe, we'll see if I ever get them. In the meantime, I'm going to order a scan guage/logger so I can track before/after temps. Not a huge deal if they don't work out.

 

[am1978]

I feel the same. I ordered a set of hood scoops (well, back-ordered anyway) because they come with silicone plugs. That way I can plug them up during fording, car washes, etc. The scoops are a shot in the dark, but hoping they help.

Same here, ordered last week.

Sponsored