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Help! Ticking Noise

Discussion in 'Wrangler JK (2007-2017)' started by BPjku2008, Dec 31, 2020.

  1. Dec 31, 2020 at 9:01 PM
    #1
    BPjku2008

    BPjku2008 [OP] New Member

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    Hey Guys,


    I've got this issue with my 2008 Jeep Rubicon w/ 190k miles. Its making this ticking noise and I cannot figure out what it is. It originally had cracked exhaust manifolds which I replaced. I then did an engine oil flush with liqui moly and added lifter additive with 5w-20 fully synthetic and a new mopar filter. I just did another oil change 200 miles later with 5w-30 and lucas oil stabilizer and at that time added lucas fuel injector cleaner. I ended up getting a misfire last night and put in new NGK spark plugs which got rid of the misfire. Today, I cleaned out all the fuel injectors using carb cleaners and a battery to cycle it through them. Put the injectors back in along with a new one for cylinder 5 where the misfire was coming from (darn injectors at dodge cost $112 a piece and the only had one). Anyways, there is still this loud ticking/tapping noise coming from the engine. Funny thing is at cold starts, it will not tick until around 30 seconds of idling. It did this after both oil changes and on every cold start that I can remember. Dash is currently clear and there are no codes. I used a stethoscope and could hear ticking that looks like it is coming from under the intake manifold so I suspect that is where it is. I also hear a tiny bit of ticking coming from the valve covers but I assume that is just normal and I would assume it isn't lifters/rockers since on cold starts it does not make the tapping noise. The noise also increases when I step on the gas pedal but the second I release it, it goes away then comes back when it idles. I'm going to post the link to a video of what the noise sounds like. Does anybody have an idea on what it could be? Also if anyone is in the Sacramento CA area, I am willing to take it over to a shop that anyone recommends.

    https://www.youtube.com/watch?app=desktop&v=jMFZCHUb8lQ
     
  2. Jan 1, 2021 at 9:53 PM
    #2
    Prerunner1982

    Prerunner1982 Well-Known Member

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    Ticking is hard to diagnose without being around the engine but I would not be surprised if you have some piston slap. The 3.8 is known for burning oil and it may have caused some wear, did you notice if the #5 spark plug looked different than the others?
     
  3. Jan 1, 2021 at 10:17 PM
    #3
    BPjku2008

    BPjku2008 [OP] New Member

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    If I remember it was a looked a bit "dirtier" then the others. Had more oil and gunk on it. I don't remember if that was the one that had a bad gap on it or not. Also going to check and see if I have bad cats clogged by bad exhaust manifolds.
     
  4. Jan 1, 2021 at 11:04 PM
    #4
    Prerunner1982

    Prerunner1982 Well-Known Member

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    I wouldn't be surprised if that is the cylinder that is making the noise.
     

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