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2001 TJ rod knock or flex plate issue HELP

Discussion in 'Wrangler TJ (1996-2006)' started by Krisryanl, May 5, 2019.

  1. May 5, 2019 at 12:06 PM
    #1
    Krisryanl

    #1
    Krisryanl [OP] New Member

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    Krisryanl, May 5, 2019
    #1
  2. May 5, 2019 at 12:22 PM
    #2
    DustStorm4x4

    #2
    DustStorm4x4 Well-Known Member

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    It sounds like it gets faster as you rev the engine. It sounds like a rod knock from what I’ve read. :( How many miles does it have?
     
    DustStorm4x4, May 5, 2019
    #2
  3. May 5, 2019 at 12:25 PM
    #3
    TJ_abuser

    #3
    TJ_abuser Well-Known Member

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    Doesn't quite sound like a rod knocking . Take the Inspection plate off and turn the engine by hand to check the flywheel. It could be a rod knocking or piston slap . It just seems to fast. My wife's 4runner has a rod knocking . That's why it's been parked for 2 years.
     
    TJ_abuser, May 5, 2019
    #3
  4. May 5, 2019 at 12:27 PM
    #4
    TJ_abuser

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    TJ_abuser Well-Known Member

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    It has a weird hollow sound maybe more like piston slap. Either way it ain't good . Did you run it low on oil? Have you been very high reving it?
     
    TJ_abuser, May 5, 2019
    #4
  5. May 5, 2019 at 12:28 PM
    #5
    TJ_abuser

    #5
    TJ_abuser Well-Known Member

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    Mine has noisey lifters sometimes on cold mornings. But it don't sound nothing like that.
     
    TJ_abuser, May 5, 2019
    #5
  6. May 5, 2019 at 12:32 PM
    #6
    TJ_abuser

    #6
    TJ_abuser Well-Known Member

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    Also welcome from Texas . Don't sweat man if it has a 4.0 there are lots of them in wrecking yards at a reasonable price. Xj,yj,and tj used that motor I believe. The ones before 03 had problems with inferior materials in the pistons. A lot of them the skirts cracked . I think there might have even been a recall.
     
    TJ_abuser, May 5, 2019
    #6
  7. May 5, 2019 at 12:34 PM
    #7
    TJ_abuser

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    TJ_abuser Well-Known Member

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    People smarter than me will chime in on this soon enough.then you can get a more solid answer . It ain't the end of the world regardless your Jeep can live on. Lol
     
    TJ_abuser, May 5, 2019
    #7
  8. May 5, 2019 at 2:22 PM
    #8
    Krisryanl

    #8
    Krisryanl [OP] New Member

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    Appreciate the replies I picked up this Jeep few days ago for a decent price just wondering what to do motor swap or rebuild this . And if there is anyone that knows if the 98 xj block would bolt into my 01 head ?
     
    Krisryanl, May 5, 2019
    #8
  9. May 5, 2019 at 2:25 PM
    #9
    Krisryanl

    #9
    Krisryanl [OP] New Member

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    It has 150k
     
    Krisryanl, May 5, 2019
    #9
    DustStorm4x4[QUOTED] likes this.
  10. May 5, 2019 at 5:38 PM
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    DustStorm4x4

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    DustStorm4x4 Well-Known Member

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    Yeah I had some lifter noise the other day. Changed the oil and it went away. I was scared it was something serious but it sounds like common problem on these engines. It sounded nothing like this though.
     
    DustStorm4x4, May 5, 2019
    #10
  11. May 5, 2019 at 5:45 PM
    #11
    TJ_abuser

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    TJ_abuser Well-Known Member

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    Lucas oil treatment helps
     
    TJ_abuser, May 5, 2019
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    DustStorm4x4[QUOTED] likes this.
  12. May 5, 2019 at 6:44 PM
    #12
    aggrex

    #12
    aggrex Well-Known Member

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    Tuffy>AEV>TTO>JW>STech>EVOcage>MagnaFlow>SpiderTrax>RockHard>TF>SpringTail>67design>Bolt>GPCA>Curt>
    Welcome @Krisryanl i've been fortunate not to experience such a distinct sharp metallic tap from the engine. My guess is a collapsed valve contacting the piston. It's definitely not a good sound and probably won't end well.
     
    aggrex, May 5, 2019
    #12
  13. Jun 10, 2020 at 12:39 PM
    #13
    Oldfaurt

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    Oldfaurt New Member

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    Oldfaurt, Jun 10, 2020
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  14. Jun 10, 2020 at 3:38 PM
    #14
    Jim Beam

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    Jim Beam Well-Known Member

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    With careful use of a stethoscope, a suspicious noise location can be detected.
     
    Jim Beam, Jun 10, 2020
    #14
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