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

[Guv]

I think it’s the main chamber, goes back to 2020 for Alfa and JEEP according to the NGK website. I bet it goes all the way back to 18 I should have looked further.

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[embedded rock]

Do you know if this is the main or pre chamber plug?

Don't recall at the moment, but sumptim lead me to believe this is the primary plug.

 

[Guv]

I agree, just looked again, 2017 for Alfa and 2018 Alfa and JEEP. Apparently the JL 2.0 has been using it all along.

 

[JeepSoxHuskies]

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

I've had two vehicles in a run of CDJR with issues. First was the Renegade, sky roof would randomly not close which isn't great when it's raining. And the 4xe Wrangler which currently sits at a dealer waiting for a fix. We have had a total of 7 vehicles.

In that time we have had probably the same number of GM vehicles (Family large SUV or small car) and had just one that was an issue, granted it was the worst of all of them (Chevy Cobalt)

 

[Heimkehr]

I had supervisor that Tig welded another techs crescent wrenchs shut.

I've said before that I'd like to see impact wrenches sold only after a background check, or, barring that, sell them with CCW (i.e., loosening) rotation only. That's based on my having to pay for impact-caused damage for which the dealership stubbornly disclaimed responsibility.

The offending tech no longer works for that dealer (and that wasn't my doing), but my position on the matter remains unchanged.

 

[Tr4ckD4ys]

From an engineering perspective, I can absolutely appreciate the thought and design that is present in this new Hurricane I4 engine. I am a sucker for cool and beautiful machines. However, I agree with others. With Stellantis track-record (especially on their latest launch the Hurricane I6 engine), this is going to cause more pain for consumers than gain.

The other thing I still see is that automakers continue to prioritize efficiency for regulatory reasons over efficiency for mechanical reasons. One example is that factory engine tunes are optimized for emissions compliance even at the expense of consumption numbers. This is detrimental to almost everything: the planet, the engine longevity and the power output. Using less gasoline over the lifetime of an engine creates less pollutants over the lifetime of the engine when including the production cycle for the gasoline and the engine in the math. When only looking at emissions at the tailpipe over a 3-year or 5-year ownership cycle (which is the baseline for most regulations), you are missing the emissions it takes to produce the gas and run the engine to 100k miles. It only helps the immediate term but is harmful in the long term. Anyway - this is just one example how regulations drive sub-optimal engine design.

It is evident to me that our politicians and administrators who are in charge for coming up with regulations do not actually have the best interest of the planet or economy in mind. I look at some of the rules and it looks more like short-term voter gain marketing than true long term thinking. If manufacturers continue to have to succumb to those philosophies, then we will of course continue to see high-output/high-efficiency engines that safely last only 60k-100k miles, especially in this scenario of direct injection, high-compression.

 

[alphawolff]

Well, the engine has been in the field for a few months now and we've already got a bulletin about destroyed plugs. I wonder if some are getting installed incorrectly at the factory, lmfao.

 

[roaniecowpony]

Only time I've seen anything like that was with high boost engines detonating.

 

[croppz]

Leave the F1 tech to F1 engineers that can actually build shit without cutting corners

 

[gato]

Well, lucky us that the Grand Cherokee jockeys are going to be the ones going through the teething pains.

Looks to me that something is causing these spark plugs to be inserted too far down and getting wacked. Maybe too much torque at the factory, maybe dimension variations.

Either way, the probability of the average Jeep tech to reinstall all 8 spark plugs correctly is 50/50 on a good day.

 

[2nd 392]

From an engineering perspective, I can absolutely appreciate the thought and design that is present in this new Hurricane I4 engine. I am a sucker for cool and beautiful machines. However, I agree with others. With Stellantis track-record (especially on their latest launch the Hurricane I6 engine), this is going to cause more pain for consumers than gain.

The other thing I still see is that automakers continue to prioritize efficiency for regulatory reasons over efficiency for mechanical reasons. One example is that factory engine tunes are optimized for emissions compliance even at the expense of consumption numbers. This is detrimental to almost everything: the planet, the engine longevity and the power output. Using less gasoline over the lifetime of an engine creates less pollutants over the lifetime of the engine when including the production cycle for the gasoline and the engine in the math. When only looking at emissions at the tailpipe over a 3-year or 5-year ownership cycle (which is the baseline for most regulations), you are missing the emissions it takes to produce the gas and run the engine to 100k miles. It only helps the immediate term but is harmful in the long term. Anyway - this is just one example how regulations drive sub-optimal engine design.

It is evident to me that our politicians and administrators who are in charge for coming up with regulations do not actually have the best interest of the planet or economy in mind. I look at some of the rules and it looks more like short-term voter gain marketing than true long term thinking. If manufacturers continue to have to succumb to those philosophies, then we will of course continue to see high-output/high-efficiency engines that safely last only 60k-100k miles, especially in this scenario of direct injection, high-compression.

Per one of your points. When my 95 Ram was under warranty the mpg took a good 30 % drop from ~12 to ~8. I took it in, after extensive testing this resolution “it’s the new clean gas, sorry there’s nothing wrong and the bigger the engine the bigger the hit”. …. Drilling, refining, transporting, ~30% more polluted less overall ??? Plus the cost. .. As an added bonus the new miracle additive MTBE iirc was later found to be polluting ground water causing cancer and removed.
I have also wondered how the pollution numbers worked. … IE, if the “clean” gas produced X amount less pollution per gallon, but more gallons were needed the real world numbers ?

Per another, after performance TB, intake, air box, injectors, over ratio roller rockers, valve springs, headers/exhaust, and tune back to 10-11 mpg with more power. But premium required. A small price.

 

[Tr4ckD4ys]

Per one of your points. When my 95 Ram was under warranty the mpg took a good 30 % drop from ~12 to ~8. I took it in, after extensive testing this resolution “it’s the new clean gas, sorry there’s nothing wrong and the bigger the engine the bigger the hit”. …. Drilling, refining, transporting, ~30% more polluted less overall ??? Plus the cost. .. As an added bonus the new miracle additive MTBE iirc was later found to be polluting ground water causing cancer and removed.
I have also wondered how the pollution numbers worked. … IE, if the “clean” gas produced X amount less pollution per gallon, but more gallons were needed the real world numbers ?

Per another, after performance TB, intake, air box, injectors, over ratio roller rockers, valve springs, headers/exhaust, and tune back to 10-11 mpg with more power. But premium required. A small price.

Wow… referencing such an old post of mine. You are the first person to allow me a rational conversation on this platform again without referencing my insane “sell it don’t sell it” 80-page banger! Maybe I have a chance for some respect on here after all…

 

[2nd 392]

Wow… referencing such an old post of mine. You are the first person to allow me a rational conversation on this platform again without referencing my insane “sell it don’t sell it” 80-page banger! Maybe I have a chance for some respect on here after all…

Yours was the last of the old posts before today’s resurrection and hit a nerve. I will never believe a 30% increase in fuel consumption and it’s cost resulted in less overall pollution. But it was “clean gas” man…. that caused cancer.
Anyway, I’ll check out the mentioned thread and perhaps pile on resurrecting it for others to pile on too.

 

[Ratbert]

Well, the engine has been in the field for a few months now and we've already got a bulletin about destroyed plugs. I wonder if some are getting installed incorrectly at the factory, lmfao.

Holy shit. I wonder if those on this thread that insisted it wasn't really an issue will pipe up.

 

[Blues Fan 30]

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

I mean sticking things in the wrong hole will usually land you in some trouble

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