3.6 epic failure

[Dgriff]

Hey all,
I have a 2021 Mojave with 9010 miles, heard some unusual engine noise took it to Jeep and engine is toast rod bearings metal in pan. Has anyone heard of this? I could not believe it and there is a strike on so waiting to see how long too get an engine. I will say the dealership is replacing it with no hassle.

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[Hootbro]

Been a few rod bearings and lower ends letting loose. Would still say it is rare with most engine failures due to top end stuff.

All I can say is given the current events, patience will be a virtue on this.

 

[ShadowsPapa]

Hey all,
I have a 2021 Mojave with 9010 miles, heard some unusual engine noise took it to Jeep and engine is toast rod bearings metal in pan. Has anyone heard of this? I could not believe it and there is a strike on so waiting to see how long too get an engine. I will say the dealership is replacing it with no hassle.

Heard of this? Sure! With the other brands, yes.
With Jeep? It's like anything else, one in 100,000 may break.
It's not "a thing" with Jeep, thankfully.
You have a bad one. It's not normal, but like any other failure it can happen.
There's over a million 3.6 engines out there, and catastrophic engine failures like that are rare. Can't say that for the other companies, though........

 

[Charles 236]

In my experience working in the service department of a large CDJR dealership from before the Pentastar was introduced, the Pentastar engines are the best gasoline fueled engines in the Stellantis product line. In the entire time that the Pentastar, in both the original and the upgrade versions, has been in production, I have seen only one bottom end failure that was caused by a problem from the factory. I have worked on a couple with bottom end problems (bent connecting rods), that were caused by driving through water that was too deep to ford. The one with factory installed problems was assembled without one of the thrust bearings.

 

[In3briatedPanda]

to ease your mind, I have a 2023 LX600 tore down bc it spun a rod bearing and was knocking 600 miles on it.

Ive seen a 10 mile, brand new ES350 just drop a transmission.

it happens

 

[redriderjf87]

Extremely frustrating for you no doubt, regardless of how rare it is. Glad the dealer is at least trying to take care of you on it.

 

[Wheelin98TJ]

Heard of this? Sure! With the other brands, yes.
With Jeep? It's like anything else, one in 100,000 may break.
It's not "a thing" with Jeep, thankfully.
You have a bad one. It's not normal, but like any other failure it can happen.
There's over a million 3.6 engines out there, and catastrophic engine failures like that are rare. Can't say that for the other companies, though........

Do you have any facts about engine failures by brand?

Posting Google hits picks up threads like this. What does that prove?

 

[Dgriff]

In my experience working in the service department of a large CDJR dealership from before the Pentastar was introduced, the Pentastar engines are the best gasoline fueled engines in the Stellantis product line. In the entire time that the Pentastar, in both the original and the upgrade versions, has been in production, I have seen only one bottom end failure that was caused by a problem from the factory. I have worked on a couple with bottom end problems (bent connecting rods), that were caused by driving through water that was too deep to ford. The one with factory installed problems was assembled without one of the thrust bearings.

Wow thanks that gives me confidence that the new engine will last a long time. I did buy this used at 5000 miles.

 

[ShadowsPapa]

Do you have any facts about engine failures by brand?

Posting Google hits picks up threads like this. What does that prove?

If people bother to do any searches or looking beyond "anyone heard of this" on a forum, they'd see that the feds are investigating Ford engines (a specific engine) and if anyone bothers to search and follow one or two links, they'd find GM engines are having a lot more incidents of "epic failure" than Jeep.
It proves that the answers to the OP's question are out there for anyone who dares to look and it proves you'll find more issues with Ford and GM than Jeep.
People don't bother to dig, though.
What I proved is that Ford and GM have far more trouble on the engine side of things than Jeep. No one else even bothers to look.
I'm to do ALL of the work? Look into the Ford and GM issues.
He asked "anyone heard of this". I could say "Duh" because any engine can have such failures, yeah, it happens. I'm proving it's a fact of life with gas engines, but worse with non-Pentastar engines.

 

[ShadowsPapa]

In my experience working in the service department of a large CDJR dealership from before the Pentastar was introduced, the Pentastar engines are the best gasoline fueled engines in the Stellantis product line. In the entire time that the Pentastar, in both the original and the upgrade versions, has been in production, I have seen only one bottom end failure that was caused by a problem from the factory. I have worked on a couple with bottom end problems (bent connecting rods), that were caused by driving through water that was too deep to ford. The one with factory installed problems was assembled without one of the thrust bearings.

Ah, hydro-locking the engine. Things are bound to "give". Ouch.

 

[Wheelin98TJ]

If people bother to do any searches or looking beyond "anyone heard of this" on a forum, they'd see that the feds are investigating Ford engines (a specific engine) and if anyone bothers to search and follow one or two links, they'd find GM engines are having a lot more incidents of "epic failure" than Jeep.
It proves that the answers to the OP's question are out there for anyone who dares to look and it proves you'll find more issues with Ford and GM than Jeep.
People don't bother to dig, though.
What I proved is that Ford and GM have far more trouble on the engine side of things than Jeep. No one else even bothers to look.
I'm to do ALL of the work? Look into the Ford and GM issues.
He asked "anyone heard of this". I could say "Duh" because any engine can have such failures, yeah, it happens. I'm proving it's a fact of life with gas engines, but worse with non-Pentastar engines.

You didn't prove anything. It's your claim, it's your job to back it up.

 

[BearFootSam]

You didn't prove anything. It's your claim, it's your job to back it up.

Cars Most Likely to Need an Engine Rebuild - Consumer Reports

I doubt there is a lot of good data on this from objective sources. Another perspective is not just whether anything will go wrong, but what. Over the course of 200k miles you expect some sensors, little things like hoses, belts, maybe a water pump or something. That is typical stuff and fairly inexpensive and easy to repair. Put another way, I would prefer an engine that has a few small issues that are easy to fix than one that is trouble free until it fails catastrophically.

The 3.6 having a good bit of room in the engine bay and with a comparatively simplistic design offers ease of maintenance and repair as an asset. With an eco-boost or a diesel, you have to contend with complex and expensive systems that are absent on the 3.6, like turbos and associated plumbing. Direct injection can leave carbon buildup in the intake and the high-pressure fuel systems are more sensitive. That the PentaStar is low stressed and somewhat antiquated is in your favor when it comes to reliability AND maintainability.

 

[Dgriff]

If people bother to do any searches or looking beyond "anyone heard of this" on a forum, they'd see that the feds are investigating Ford engines (a specific engine) and if anyone bothers to search and follow one or two links, they'd find GM engines are having a lot more incidents of "epic failure" than Jeep.
It proves that the answers to the OP's question are out there for anyone who dares to look and it proves you'll find more issues with Ford and GM than Jeep.
People don't bother to dig, though.
What I proved is that Ford and GM have far more trouble on the engine side of things than Jeep. No one else even bothers to look.
I'm to do ALL of the work? Look into the Ford and GM issues.
He asked "anyone heard of this". I could say "Duh" because any engine can have such failures, yeah, it happens. I'm proving it's a fact of life with gas engines, but worse with non-Pentastar engines.

Thanks for the information that this is very rare in jeep/penstar I did research but only on jeep and did not see much so I thought I would reach out to jeep owners thanks to all for your input!

 

[Jeeperjamie]

It's rare but it happens. At least it sounds like you have a solid dealership that has got your back. It happens in all makes and models,nothing is perfect and no auto manufacturer has a perfect record. Be patient and it should all work out.

 

[ShadowsPapa]

Difficult to prove a negative. Proving a positive is easy - just find instances.
One can assume by lack of evidence that something exists that it must not be there, but the point is, proving a negative isn't so straight forward.
A search shows almost nothing on Jeep, but shows up a lot on GM and Ford.
So in that respect, i have proven that GM and Ford have a lot of engine issues related to major failures - and there's a lack of any evidence that Jeep has similar issues.
I showed what someone with critical thinking skills, pattern recognition skills, should be able to see - when seeking engine failures if you instantly come up with huge numbers in other makes, to the point of the feds being involved in the case of Ford, but the same searching doesn't show anything for Jeep/Pentastar - does that not indicate there's nothing out there to find?
GM and Ford show up fast- lots to find, many thousands, Jeep, not so much.
I did searches for failures for each of the "big three" as far as engine failures.
All I found with Jeep was ticking and misfires, and some of the law suits even being dismissed.
You saw what I found with Ford and GM.
It's a pattern of failures of the lower end on those engines, not the 3.6
In the day of the internet, people gripe when anything goes wrong. Huge failures often ignite more than complaints, but raging hate and posting all over any site that will take their posts.
So why isn't anything showing up when I run the same test, the same search, for each of the 3, and I get "ticks" for Jeep, catastrophic failures for GM and FORD.
I'd say I've proven something.

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