New Jeep 2.0T Hurricane 4 has complex tech [Engineering Explained]

[Richard_JL]

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[Ratbert]

Up to 35 PSI of boost is insane!

But man, that's one complex AF engine.

 

[jeepingib]

From the company with such a stellar reliability record and great customer support and service. How can this possibly go wrong?

 

[Murphy Slaw]

From the company with such a stellar reliability record and great customer support and service. How can this possibly go wrong?

My best vehicles have been Mopar. My Ram needed a water pump once. 10 years and over 100K miles, it’s still on original brakes.

I must be lucky, but we’ve had the best luck with them, even the wife’s Caravan back when the kid was playing soccer (20 years ago) was extremely dependable.

I see those same lists, but have never had those results from Mopar. It’s all we own.

 

[4Play1]

Agree. Been on the CDRJ team since 95. 10+ vehicles and only trouble was a 2006 Jeep Liberty windows.

 

[embedded rock]

I'd like to hear how Jeep is going to manage the additional heat generated with that boost and compression ratio.

 

[Stetson]

This is super cool. Very innovative. Exciting to see something like this in a production car. With the investment in this engine, I think we’ll see it deployed accross other vehicle lines. Maybe a hi performance version of the new Cherokee. Maybe the wrangler.

Nice to see this. What an improvement over their current offerings

 

[Guv]

I'd like to hear how Jeep is going to manage the additional heat generated with that boost and compression ratio.

Maybe a higher capacity boost and engine cooler

 

[alphawolff]

8 spark plugs, two different types, and if you stick them in the wrong hole it destroys the engine

 

[Guv]

8 spark plugs, two different types, and if you stick them in the wrong hold it destroys the engine

Probably won’t fit, different size hex and socket for pre and main chamber.

 

[alphawolff]

Probably won’t fit, different size hex and socket for pre and main chamber.

If that was the case, they wouldn't need to put this in giant red warning text:

 

[2nd 392]

If that was the case, they wouldn't need to put this in giant red warning text:

My son’s 98 low tech, low power for size 318 Dakota was starting to burn a little oil and struggled to pass the smog test at only 328,000 mi. ….. the unreliable POS. I’m sure the new complex, high tech, high boost engines will be more reliable and last much longer, ya think ?

 

[Traveller128]

And people will want to run this on 87 octane.

Volvo 2.0 T6 in 2016: 306 HP, 295 TQ in normal calibration. 324HP 354TQ Polestar software. Full warranty coverage. Ford Mustang 2.3L performance package, 332HP 350TQ, or 310/350 in base trim.

My last Mustang PP 2.3 made 340HP/378 TQ at the wheels on 91 octane, 380HP/422TQ throwing a 5 gallon can of unleaded race gas in it and bumping the programming to the calibration for it. On 91 octane it still hit 31 MPG when traveling.

This isn't new for 2.0 performance, it's a highly technologically advanced way of running an ICE. Historically, the highly advanced combustion cycle engines made by any manufacturer, did NOT end up being the most cost efficient high mileage versions of those engines. This kind of tech is NOT cheap.

It remains to be seen how it does but understand that F1 tech has never transferred well to passenger vehicles over the years. It's unnecessary tech for passenger cars in most respects. Having 4 overhead cam V8's with 32 valves is not as simple or inexpensive as a single cam pushrod V8 with 16 valves. Complex timing chains/belts versus MUCH simpler systems. Formula 1 tech is more complex, more expensive, more expensive to maintain. F1 tech is NOT for longevity, it's for specific output. They get to replace their engines during the season at a certain schedule.

It's cool, it's interesting from an engineering standpoint, it usually doesn't last as long as simpler designs. It costs more money to design, produce, maintain. You spend a lot of resources to then claim it's better on resources.

Having worked on complex engines for longer than Stellantis has been making them, I can say that there are things that will make this a lot more expensive to repair during the life of the vehicle. For people that are willing to spend a lot of money on vehicles, it's not an issue. For people looking to buy and keep a vehicle, this won't be something you want to own in 10 years. It will start burying you in upkeep unlike just buying an older tech vehicle and doing simple things to keep it running.

Not a luddite, I like tech, but not on passenger vehicles that are daily driver's. The more complex you make the plumbing, the easier it is to stop up the drain.

 

[Guv]

If that was the case, they wouldn't need to put this in giant red warning text:

They do it for people that don’t pay attention to what they’re doing.
Is it really that hard to follow the instructions?

 

[Heimkehr]

From the company with such a stellar reliability record and great customer support and service. How can this possibly go wrong?

A fair point, but the same hand-wringing occurred when the 2.0T GME found a home in the 2018+ Wrangler. At that point, the engine was already two years old, having landed first in certain Alfa Romeos. More to the point, with the design now a decade old, the 2.0T in our Jeeps has arguably proven more reliable than the current iteration of the cam/rocker/O2 sensor-eating Pentastar V6.

With history as a guide, it's only fair to give the new GMET4 Evo (its proper name) a fair chance.

If that was the case, they wouldn't need to put this in giant red warning text:

The engineers did everything except the one simple thing that should have been done: a different thread pitch for each plug.

...understand that F1 tech has never transferred well to passenger vehicles over the years.

Paddle shifters are popular, and reliable. The AutoStick feature of the 850RE is functionally the same thing.

Hybrid powertrains, traction control, lightweight body materials...all of that, and more, is now dependable, mature technology that was cross-walked from the Formula racing world. Traction control has been a required feature on all new cars sold in the U.S. since 2012.

Some of these things have indeed worked out well.

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