Exhaust Noise - Manifold Gasket?

Discussion in 'KJ General Discussion' started by AJWhite, Mar 11, 2020.

  1. AJWhite

    AJWhite New Member

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    Just picked up this 2002 Liberty limited 3.7. I've replaced the muffler and tailpipe and donut gaskets. It still has an intermittent loud rumble when I push on the accelerator. I'm having trouble figuring out where it's coming from because it's intermittent. I'm not sure if it's a manifold gasket or maybe the v-clamp above the cat? Doesn't run rough or stall and no codes. Almost sounds like a pressure build up or something, it's kind of hard to explain. Anyone had anything similar? Any tips for helping me pinpoint it?
     
  2. LibertyTC

    LibertyTC Well-Known Member Staff Member Moderator

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    Intermittent not much fun.
    All I can think about is having some one rev it up to 2000-2500rpm and back to zero while in Park, and while under, try to find the area it may be coming from.
     
  3. turblediesel

    turblediesel memberable

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    Try wadding up a rag and momentarily blocking the exhaust pipe. Some leaks are obvious and others will need an assistant so you can move your ears around.

    Maybe a blown baffle in the muffler or cats?