1. Faint knocking 3.7?

    Hello all! I just picked up an 08 Liberty 3.7 auto 4x4 with 80k and noticed it has a faint deep knock after it's warmed up. The knock is only there when in gear at idle. You can feather the gas and hear it but it's gone upon acceleration. I'm assuming it has a bad rod bearing, I'm just wondering if there might be something else commonly mistaken for a bad engine on these specific models. Any input would be greatly appreciated!!!!

  2. #2
    Join Date
    Feb 2009
    Location
    Dayton Ohio Area
    Posts
    5,957

    Re: Faint knocking 3.7?

    Any misfire?

    Check this video about rocker arms loosening.
    Dodge or Jeep 3.7, 4.7 Engine Noise from Rocker Arms Falling - YouTube


    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

  3. #3

    Re: Faint knocking 3.7?

    No miss, runs like new, all monitors set.

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