1. 3.6L life expectancy

    Hi,

    I am looking at potentially purchasing a 2013 Rubicon JKU.
    The Good - Single Owner (older couple), never off road, meticulously maintained, decent price.
    The bad - 270 000 km (about 168k Miles)

    Is that kind of milage a concern for a 3.6L pentastar that has been serviced regularly and will taken care of?

    Would love any feedback.

    Thanks

  2. #2

    Re: 3.6L life expectancy

    Mine has 113k but is a '16. 3.6L is a strong engine if taken care of. I just did $1300 worth of needed stuff - tune up, injectors, and serpentine belt. I'm assuming the price is right... mine runs great! Engine wise... I wlhave a front hun giving me problems now?!? Oy vey

    Sent from my SM-S906U using Jeepz.com mobile app
    Wind therapy is the best therapy...

  3. #3
    Join Date
    Feb 2009
    Location
    Dayton Ohio Area
    Posts
    6,661

    Re: 3.6L life expectancy

    Any lifter type knock may be the rocker arms loosening.

    08 liberty 95k mi running strong


    Never look down on anyone unless you are helping them up - Jesse Jackson
    "Never look down on anybody unless you're helping him up" - Jesse Jackson

  4. Re: 3.6L life expectancy

    I have a 14 jk with the 3.6. Iíve replaced my oil cooler, radiator, and all rockers and lifters. 80k when the oil cooler went and 90k when a rocker bearing failed. I drove it 24k miles one summer towing a teardrop around the USA. It really is a solid engine that isnít too difficult to work on. If you arenít doing the work yourself it can be pricey because some simple maintenance things require a lot of dismantlement. Most of the issues that the early 3.6s had should have been resolved considering the mileage. If the price is right listen to your gut when you see it.


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  5. #5
    Join Date
    Jul 2021
    Location
    Middle Tennessee
    Posts
    17

    Re: 3.6L life expectancy

    I thought about "Modernizing" From my old YJ to a JK.....And after looking at four and ALL of them had replacement motors, I decided to stay "Antiquated",,,,,,,,

  6. Re: 3.6L life expectancy

    The 3.6 is actually a pretty solid engine. The issues are relatively small in comparison to how many have been produced. The bottom end can last 500k miles and the rocker issue should be resolved after replacement. I donít know of anyone that has had to replace the whole engine. And I know lots of people with close to 200k miles relatively problem free. Some mechanics are lazy and would rather replace the engine than break it down and fix the issue. Sometimes itís best to just stick with good old faithful.


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  7. Re: 3.6L life expectancy

    Quote Originally Posted by Eclektq View Post
    I thought about "Modernizing" From my old YJ to a JK.....And after looking at four and ALL of them had replacement motors, I decided to stay "Antiquated",,,,,,,,
    I thought about doing the same last year, but decided against it after realizing that I wouldn't run the trails as hard in a new one like I do in the Old Dawg YJ. Since the YJ is my fun weekend vehicle and not my primary ride, I decided to keep it instead. At 30 years old its taken a lickin and just keeps on ticking. Good ole bullet proof AMC designed 4.0 inline six. They dont make them like that anymore, it just wont die.
    Plus the money that I've saved from not having vehicle payments, has allowed me to have the funds to maintain its mechanical condition, appearance and upgrades.
    Last edited by zebraranger; 02-10-2023 at 01:52 AM.

  8. #8

    Re: 3.6L life expectancy

    when did they put the 3.6 in jeeps? i think that is what my buddy has and he is having to replace it now. it blew something out on the highway and he had it rebuilt but he had to replace the heads and now it looks like the bottom end needs replacing so he is just going to do a crate motor
    03 rhd tj

  9. Re: 3.6L life expectancy

    Quote Originally Posted by superj View Post
    when did they put the 3.6 in jeeps? i think that is what my buddy has and he is having to replace it now. it blew something out on the highway and he had it rebuilt but he had to replace the heads and now it looks like the bottom end needs replacing so he is just going to do a crate motor
    If I recall right, I believe they switched from the 3.8 to the 3.6 around 2012, prior to that it was used in the Grand Cherokee.

  10. Re: 3.6L life expectancy

    The 3.6 is actually a fantastic engine.I have driven this car many times, it is really a wonderful car, I really like it.

  11. #11
    Join Date
    Jul 2021
    Location
    Middle Tennessee
    Posts
    17

    Re: 3.6L life expectancy

    Looks great...

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