Turbo on a long trip

[Zandcwhite]

This is not needed at all. The Turbo cooling pump continues to work after the vehicle is shutdown on it is on, if needed.

Drive your jeep hard and park right away in the garage, shut it off, go outside behind passenger front tire and you will hear that pump going for a few minutes. If you drive mildly, it is. not needed and doesn't come on.

This is not the 1970s anymore, evey manufacturer has learned how to keep turbos cool. Even Jeep.

Even the manual says 1 minute from highway speed. Unless your garage is on pit row, you've got that 1 minute covered in nearly every scenario I can envision short of pulling over on the side of the freeway (which nobody should do outside an emergency).

Sponsored

 

[Twisted10]

i only let my turbo cool down in my truck if im pulling

 

[Guv]

To be fair, the diesel has a big heat soak problem because the radiator can't shed enough heat. That engine generates a lot more heat than the 2.0 by a long shot. So the 2.0 doesn't need as much cool down.

Still, following that chart for the 2.0 won't hurt anything.

Except, gasoline engine exhaust is hotter than diesel.

 

[grimmjeeper]

Except, gasoline engine exhaust is hotter than diesel.

It's more about engine displacement than gas vs diesel. What matters is total heat load, not specific temperatures. Bigger engines generate more total heat energy.

The radiator can only dissipate so much heat. The 2.0 generates less total heat energy overall. So the radiator is better at dealing with the heat it generates.

A 2.0 diesel in the Jeep would probably be small enough to cool properly because it would generate about 1/3 less total heat.

 

[4Lo2Yolo]

Modern diesels also go through regen periodically in order to clean the diesel particulate filter.

The worst I've seen was the Ford 6.4 Powerstroke designed by Navistar. It was the first year powerstroke with DPF. It had exhaust gas recirculation (EGR) that sent the hot exhaust gasses back into the intake side (cold side) of the turbo, but first the exhaust gasses were sent through a water cooled heat exhanger. Because of this massive heat load it had a ridiculously large cooling system, with a water pump impeller so large that the pump vanes went supersonic around 2000 RPM. This caused cavitation, which eroded the front of the block until pinholes allowed coolant to leak into the crank case which contaminated the oil. Oh yeah, by design fuel was injected into the 7 and 8 cylinders during the exhaust stroke, which was ejected into the exhaust to ignite the soot in the DPF and turn it into ash. /which washed the oil off the cylinder walls in 7 and 8, which gouged the cylinder walls over time.

I had one in an F450 work truck, and it's a shame because it was a really good running engine ruined by clumsy emissions systems.

 

[Megawatt]

No, get in, sit down and drive worry free.

 

[gato]

This is in the manual for my EcoDiesel and is in line with what I’ve seen regarding turbocharger cooldown for everything I’ve had with a turbo in it.

That diesel is a disaster, and that is why Stellantis stopped making them after 3 years. The warranty costs were becoming astronomical. The diesel mandatory exhaust after treatment (DPF, EGR, etc) trap an insane amount of heat and the vehicle was never properly engineered.

Only solution was to cancel it.

 

[2nd 392]

Trip length is irrelevant, just don’t shut down immediately after a hard run or worse a hard pull. Even in the big rigs a 5 minute idle down was typically sufficient after a hard pull, 3 minutes normally … the old fashioned way.

 

[40Caliber]

No, get in, sit down and drive worry free.

or as worry free as you can.... it's a jeep after all

full disclosure , i have 3

 

[BDinTX]

That diesel is a disaster, and that is why Stellantis stopped making them after 3 years. The warranty costs were becoming astronomical. The diesel mandatory exhaust after treatment (DPF, EGR, etc) trap an insane amount of heat and the vehicle was never properly engineered.

Only solution was to cancel it.

I don’t care for the emissions crap on it but I still love it.

And you know what they say about opinions.

 

[Zandcwhite]

It's more about engine displacement than gas vs diesel. What matters is total heat load, not specific temperatures. Bigger engines generate more total heat energy.

The radiator can only dissipate so much heat. The 2.0 generates less total heat energy overall. So the radiator is better at dealing with the heat it generates.

A 2.0 diesel in the Jeep would probably be small enough to cool properly because it would generate about 1/3 less total heat.

The other huge factor when comparing turbos is boost pressure. The 2.0t tends to run about 12psi I believe. The ecodiesel 24-26psi. Even if you put a 2.0 diesel in it, running double the boost pressure is going to make the same or more heat than the 2.0t gas engine. Combine that with the low hp output of a diesel that small and they'd likely run 35+ psi. At that point I'm betting the little diesel runs hotter by a large margin. Of course the new 2.0t gas version is going to run up to 34psi which could make heat an issue if they put it in the wrangler.

 

[grimmjeeper]

The other huge factor when comparing turbos is boost pressure. The 2.0t tends to run about 12psi I believe. The ecodiesel 24-26psi. Even if you put a 2.0 diesel in it, running double the boost pressure is going to make the same or more heat than the 2.0t gas engine. Combine that with the low hp output of a diesel that small and they'd likely run 35+ psi. At that point I'm betting the little diesel runs hotter by a large margin. Of course the new 2.0t gas version is going to run up to 34psi which could make heat an issue if they put it in the wrangler.

The running temperature of the engine doesn't matter as much as you think it does.

What matters is the quantity of energy being generated as waste heat. Once you're up to operating temperature, you have to shed that energy. Whether you run at 195° or 235°, it doesn't matter. So long as the cooling stack can shed whatever heat pushes you higher, the set point makes little difference.


I have no doubt we'll see a different grille configuration in the next gen Wrangler. They will enlarge it to make room for a bigger cooling stack. With the high output engines they're making, they have no choice.

 

[MDMiles]

Indiana to Florida and back. Never had any problems in my ‘19 Rubicon 2.0 turbo.

 

[whitechocolate]

 

[openingshok]

Turbos don't need down time. The only time you want to consider anything for a turbo is like on a super duty pulling a trailer. You want to let the engine idle for a minute or two to let the bearings cool down before shutoff. For the 2.0 just run it.

Sponsored