Thoughts on 3.6 longevity

[Terrymo]

Op was definitely a yiffer.

TIL a new word “yiffer”. Urban Dictionary is a boomer’s best research resource.

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[Gangplank]

Or the entire state of Florida as a whole these days.

Jeez. The entire state. That’s a lot of hate.

 

[AnnDee4444]

Jeez. The entire state. That’s a lot of hate.

If only everyone would keep that in mind for California & Texas.

 

[AlphaWrangler]

I was reading about the issues with metal inside the 3.6 . I have a 2018 jl unlimited with the 3.6. I would like to know the mileage of the first oil change and all after that,also was the engine broken in properly. I would like to hear feedback from the people who have had this issue with their 3.6

Personally did my first oil change at 5k and have continued to do it every 5k. Ive done every oil change and without failure there is metal. less in the filter lately more in the pan.

 

[Gangplank]

Personally did my first oil change at 5k and have continued to do it every 5k. Ive done every oil change and without failure there is metal. less in the filter lately more in the pan.

Interesting. I did my oil change on my 21 JLUW 3.6L this weekend. 34,750 miles and about 7k between now and last oil change. It was dirty but no metal at all in the filter. If you are seeing metal I’d get an oil analysis done to get a base line and see what it is. I’d also probably bump up to 5w-30 for added wear protection.

 

[AlphaWrangler]

Interesting. I did my oil change on my 21 JLUW 3.6L this weekend. 34,750 miles and about 7k between now and last oil change. It was dirty but no metal at all in the filter. If you are seeing metal I’d get an oil analysis done to get a base line and see what it is. I’d also probably bump up to 5w-30 for added wear protection.

ive been using 5w-30 for a good bit now. since its no longer in the filter i assume its just whatever gunk stays at the bottle of the pan. the engine has self clearanced and whatever im seeing is left overs or whatever gunk gets knocked into the pan. 108k and still happily revs to the moon.

 

[TCogs1]

So then you DON'T believe they aren't all affected? Your wording is confusing.

It does happen at a wide range of miles, and for that reason no one can say at this point that they aren't all affected. Much like the DoD lifters on the Hemi and SBC V8s for example - the old single mode systems would generally fail in the 130-150k range. Some would fail sooner, some would last longer...but it's generally accepted that they all WILL fail, it's just a matter of when. Our JLs are relatively young, the vast majority of us haven't hit 100k miles yet...so there's still a lot of time left before we will know the full extent of this.

That said, the problem is a design issue. The only way to fix it is to fix the design. Different weight oil isn't going to fix it, different oil change intervals isn't going to fix it. If you want to keep your JL for the long haul, get a warranty.

But don’t use fca warranty, they are the worst….

 

[Ratbert]

But don’t use fca warranty, they are the worst….

Is there a better 3rd party alternative that you neglected to mention?

 

[WXman]

I'll say this... I started looking for a used JL for a low price to play with earlier this summer. Something in the $20k range. Almost every 2.0 equipped JL I found with 80-100k miles on it had engine issues, and the Jeep I liked the most had such serious 2.0 issues that it was in the dealership service bay for a couple of weeks. I passed.

You don't see that with the 3.6. They do have a couple of issues but at 100k miles they're usually still rock solid.

 

[c20040215]

• Jeep Grand Cherokee
• Dodge Durango
• Jeep Wrangler
• Chrysler 300
• Ram 1500
• Chrysler Voyager
• Jeep Gladiator
• Ram 1500
• Dodge Challenger

also use/used the 3.6L. Why does everyone have to go right to the minivan example?

• Jeep Grand Cherokee
• Dodge Durango
• Jeep Wrangler
• Chrysler 300
• Ram 1500
• Chrysler Voyager
• Jeep Gladiator
• Ram 1500
• Dodge Challenger

Because they all use the minivan motor

 

[TCogs1]

Is there a better 3rd party alternative that you neglected to mention?

Ally is what I use now and they have an option for lift kits… my dealer (crown dodge in Ventura) swears - praises this warranty.. but after lifting with teraflex and evo… all issues are gone.. ( death wobble )…

 

[Zandcwhite]

• Jeep Grand Cherokee
• Dodge Durango
• Jeep Wrangler
• Chrysler 300
• Ram 1500
• Chrysler Voyager
• Jeep Gladiator
• Ram 1500
• Dodge Challenger

Because they all use the minivan motor

The same ones hung up on "it's a minivan motor" miss the 4.0L and it's garbage 190hp and 235ftlbs. I'll take the 3.6L over that under powered boat anchor every day. I don't miss pulling grades in the slow lane at 45mph in the least bit.

 

[AnnDee4444]

The same ones hung up on "it's a minivan motor" miss the 4.0L and it's garbage 190hp and 235ftlbs. I'll take the 3.6L over that under powered boat anchor every day. I don't miss pulling grades in the slow lane at 45mph in the least bit.

The 4.0 is just an evolution of an engine designed for the Nash Rambler... a car that did not have a good reputation when new.

https://autohistorypreservationsociety.org/history-i-6-nash-and-amc-engines-1956-1991/

From: https://www.curbsideclassic.com/vin...e-new-1964-rambler-american-rather-unhappily/

"But even the excellent new sixes that arrived to replace it didn’t fix the other dynamic shortcomings of the American. There really was a reason Ramblers got the rep back then for being old ladies’ cars, even when they were trying hard not to be, appearance wise, like this very attractive ’64 American coupe"​

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[Zandcwhite]

The 4.0 is just an evolution of an engine designed for the Nash Rambler... a car that did not have a good reputation when new.

https://autohistorypreservationsociety.org/history-i-6-nash-and-amc-engines-1956-1991/

From: https://www.curbsideclassic.com/vin...e-new-1964-rambler-american-rather-unhappily/

"But even the excellent new sixes that arrived to replace it didn’t fix the other dynamic shortcomings of the American. There really was a reason Ramblers got the rep back then for being old ladies’ cars, even when they were trying hard not to be, appearance wise, like this very attractive ’64 American coupe"​

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It has an earned reputation for durability and reliability. Wheeled the hell out of everyone i owned and all went past 200k miles. Doesn't change the fact that it was under powered even in a <4k pound xj or tj in the mountains or on the freeway at speed. Aside from some full sized truck diesels, I think most engines were initially developed for cars period.

 

[AnnDee4444]

It has an earned reputation for durability and reliability. Wheeled the hell out of everyone i owned and all went past 200k miles. Doesn't change the fact that it was under powered even in a <4k pound xj or tj in the mountains or on the freeway at speed. Aside from some full sized truck diesels, I think most engines were initially developed for cars period.

HP/torque was low, but so was weight when first released. YJ & XJ were 3,000-ish pounds... while the JL is at least 4,000. The 8-speed really makes a difference...

I wonder if you can mount a ZF 8HP to a 4.0

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