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rattle underneath truck

Discussion in 'Under the Hood' started by Dmiller15, October 2, 2002.

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  1. Dmiller15

    Dmiller15 New Member

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    City, State:
    graham,wa.
    Year, Model & Trim Level:
    1998 xlt
    HELP!
    I just bought a 1998 explorer and it has developed a rattle underneath by either the oil pan or the transmission. It is the loudest when it is in park, when I put it in drive it quiets down considerably. I dont know if that is because of the transmission or it is because of decreased rpm when it is in gear. The rattle is sort of like a diesel rattle without a rythm.(as in a rod knock).Does this ring a bell? Any help would be greatly appreciated.


    Dave
     
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  3. tbomb

    tbomb Well-Known Member

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    Year, Model & Trim Level:
    98 Sport 4.0 SOHC 4x4
    i would give the exhaust system a looksie under there - dont forget the heat shields too.
     
  4. 410Fortune

    410Fortune Mud Season Staff Member Moderator

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    Thats right, it is very common for the heat shields on the resonator and the cat convertor to come loose and rattle like crazy.

    Try parking next to a wall(s) and rolling your window down, then the pass window down, this can help you identify what kind of noise it is and teh whereabouts of it;s location.

    I ripped mine off once they came loose on my stock cat, I tried to tighten it back up with a 18" hose clamp but it never worked right. My aftermarket cat and exhaust have no more heat shields.......those things rattle like crazy!!!!!!! oh and dont burn yourself :)
     
  5. PekingMan

    PekingMan Active Member

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    I too was going to recommend the catalytic converter/heatshield.
     
  6. Slick Rick

    Slick Rick Active Member

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    Yeah, check the exhaust and heat shields. It happened to me too. I knew to check the exhaust first, found that something became loose, brought it to an exhaust shop and got them to weld it. Free of charge and runs great.
     
  7. TarHeel085

    TarHeel085 And den

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    yup! mine do the same thing!
     
  8. Okrazie1

    Okrazie1 Elite Zoom Zoomer!

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    Which engine do you have? If it is the 4.0 OHV, it could be the infamous piston slap. It is usually described as a diesel sound or "marbles in a can". Mine has done it for quite some time. It is not supposed to affect the longetivity of the motor, but it is kind of annoying at times.
     
  9. punkbek3886

    punkbek3886 Active Member

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    okrazie1, i think i know what ur talking about. it sounds like a diesel from the passenger side of my engine. prolly something in the exhaust isnt sealed up and its more pronounced because of that
     
  10. southtxexplorer

    southtxexplorer New Member

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    I had a loud rattle I thought for sure was a loose heat shield. It turned out to be a tiny rock that was just barely too small to go through the drain hole in the heat shield. It was really hard to believe that such a small rock could be so loud.
     






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