how many 3.6 engine failures

[Rodeoflyer]

Here's a better one for finding the rocker/lifter tick bank

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[Spank]

This was right when my buddies got that tick as well. You should jump on this asap to see if you can save it. He couldn't so it's Hemi time.

I don't have a tick and the engine runs smooth, but I do have the infamous Pentastar "injector noise." But the computer reports the engine is running perfectly... for now.

 

[Rodeoflyer]

 

[Rodeoflyer]

Injector noise is not drivetrain rattle.. it's a tick vs rattle noise easy to discern.

 

[djxizodu]

Police cars end up having issues with their timing chains. I think that the oil gets diluted with fuel from lots of idle hours and PDs won’t change the oil because “it’s not due because of mileage yet” which is complete ignorance.

if you keep your oil changed they will last longer than you need it to.

 

[djxizodu]

My 2016 JKU 75th Anniversary at 55k miles looks to have developed an oil leak, luckily I have Powertrain Coverage up until 4/2024 via Certified Pre Owned purchase which is 7 year/100000 miles. I took it to my local mechanic who said it looks to be the main seal, not the typical oil cooler issue, he did not touch after I found out I still have coverage.

this recent cold blast seems to have disabled the “most capable vehicle ever”, with the failure of the TStat housing and a week later this leak, and throughout its history a new radiator at 22k miles, failed rear axle seal at 40k, failed front calipers at 35k, on a vehicle that I baby with only Pennzoil synthetic oil changes, never beyond 5K miles, 1/2 recommended interval fluid changes (diffs, Xfer case changed every 15k miles, only Mopar fluids), 2 quarts of ONLY Mopar ATF+4 swapped every oil change, and never taken off pavement. It’s truly an embarrassment. A Toyota is barely broken in at 55k miles, but FCA GARBAGE ? Ready for the trash heap. My ”weak” Mazda CX-5 Unaffected from the same cold snap.

Ah. The old “bUT toYOtA” antidote. Always has to come up.

just like how Toyota Matrixes (Matricees, Matrix???, anyways) are rated more reliable than the completely different /s Pontiac Vibes?

or how a guy told me about XJ transmissions being junk but his Toyota trans was so good and how his mind stopped working when I told him they were the same Aisin transmission.

Same when people talk trash about Chrysler transmissions but BMW and Mercedes, now they can make a transmission! Yeah? The same ZF trans? Lol

My friends JL had 90k miles put on it before any work was done to it. And that was to change tires. Made it to 130k before a bad wheel bearing was the first issue. Other friend put 120k miles on with no issues. So.. maybe it’s you? Maybe it’s a bad Jeep? But pentastar JK and JL jeeps are some of the most reliable vehicles that exist.

 

[Antonio]

I had a 2016 3.6 rubi before going diesel in 22” and the only issues with the engine l had was about 5 years and just around 65K miles it developed an oil leak which was taken care of under extended warranty, aside from this I’ve had nothing but positive experience with the motor during the 6 years of ownership

 

[Swisskidd]

We own a 2013, bought in 2017 with 70k miles. Developed lifter Tick at 83k - was repaired under 100k factory powertrain warranty (dealer told us previous owner had 8 lifters replaced at 62k; they replaced the remaining lifters at our incident). We’re now at 135k with zero issues/zero oil consumption. (Considering water pump at 120k and a couple thermostats over time, as maintenance).

Drove 58k miles on my 2018 JK in a bit over 2 years - no issues.

Did 60k miles on my 2020 Grand Cherokee in a bit over 2 years - zero issues.

Each engine is fitted with an oil catch can. The GC engine seemed to fill it the fastest, not sure if the new design 3.6 (VVT and Variable Lift) has lower friction rings than the older design 3.6.
Am also a firm believer in preventive maintenance and frequent(5k) oil/filter changes - Mobil-1 5W30 in all three engines.

Needless to say my incoming JL has the 3.6 also.

 

[Swisskidd]

I have a total of 80K between two engines... no issues (other than a failed battery at 30K and 2 years.
I did add this oil check valve system to my Rubicon. Apparently the 3.6 drops oil out of the top of the engine (oil filter) in about 10 minutes or so.. this keeps that from happeining.
Pentastar 3.2L and 3.6L 2014 to present. MS-201-BK Cartridge to Spin-on Adapter - Baxter Performance (baxterperformanceusa.com)

Interesting link - thanks for posting.

 

[Cyclrder]

you are quite welcome. I think it's a pretty neat product and extremely well made and it gives me piece of mind.

 

[ebclark2]

Depends on who you ask. A lot of people have no issues with them. But a lot of people did encounter issues, particularly the 3.6 that was used in the JKs and most chrysler vehicles between 2011 and 2015 or so. (The JL uses an upgraded version that among other things, changed the style of the lifters, I think?)

https://www.pentastars.com/engines/PUG.php

I've still seen people run into issues, but not many.

I want to say it's too soon to really get a feel for how reliable they are in the JL. The oldest JLs are 4 years old now. (2019s that were made in 2018?). So we're.. getting close. As it stands, you either have people that put like 50k a year on their motor and have high mileage, or people who have like 50k from putting average mileage on them. Neither of those usage patterns are known for causing engine issues.

What you want to see, is how reliable it is after say 8 years and 100k miles. Or maybe people who've managed to rack up 150k miles on a 2018 by now. I suppose that counts.

As far as I can tell, most of the reliability issues on the JL come from the electronics. Stuff like the Rubicon's rear locker sensor failing, or the ESS batteries having issues, or a jump start on a 2018-2019 blowing a fuse and causing issues, or some other electrical issue.

Yea, changed the style of lifter to variable lift. I'm sure it's going to be super reliable. Me, being a dumbass, didn't realize this until after purchasing.

 

[mwilk012]

Yea, changed the style of lifter to variable lift. I'm sure it's going to be super reliable. Me, being a dumbass, didn't realize this until after purchasing.

It’s the rocker arm that is actuated for variable valve lift. It’s a perfectly fine system, and common across many makes and models.

 

[TheRaven]

So.. maybe it’s you? Maybe it’s a bad Jeep? But pentastar JK and JL jeeps are some of the most reliable vehicles that exist.

Hold on...I think maybe you want to qualify that statement a bit. Perhaps if you said "Pentastar JK and JL DRIVETRAINS are some of the most reliable that exist" then yes, I think you are probably right. But as a total vehicle? Hell no. The JL is a frikin disaster. But this illustrates very well the point I always try to hammer home in the "should I buy an extended warranty" threads - it is not the engine/transmission/suspension that you need to be worried about. It's everything else.

 

[Rodeoflyer]

If if it's a disaster, its the best disaster ever made.

 

[mwilk012]

Hold on...I think maybe you want to qualify that statement a bit. Perhaps if you said "Pentastar JK and JL DRIVETRAINS are some of the most reliable that exist" then yes, I think you are probably right. But as a total vehicle? Hell no. The JL is a frikin disaster. But this illustrates very well the point I always try to hammer home in the "should I buy an extended warranty" threads - it is not the engine/transmission/suspension that you need to be worried about. It's everything else.

based on what data do you make this claim?

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