Can't figure out exhaust rattle - need help!

Discussion in 'Exhausts' started by PinkieT, Aug 19, 2020.

  1. PinkieT

    PinkieT Well-Known Member

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    Was riding in my wife's 98 when we started hearing a high pitched rattle over bumps. I got home and crawled underneath tapping everything I could find that might be the problem. The tailpipe is hitting the axle (we put lowering springs on it) but that isn't it. No heat shields or other possibilities in the area. When I hit the mufflers with my knuckles I heard the rattle. YES! It is like a "boing" vibration that lasts a second or two. I kept moving around and went back to try and pinpoint it, and it was not as bad. Less than five minutes later, it was gone! The muffs are welded Flowmasters, or at least clones. Is it possible for inside baffles to be loose enough to expand under heat and rattle, and stop once cooled off? If not, any other ideas???
     
  2. ttocs

    ttocs Post Whore

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    did ya thump the cats?
     
  3. PinkieT

    PinkieT Well-Known Member

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    They hissed and bit me...
     
  4. ttocs

    ttocs Post Whore

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    it could be clogged or broken cats. When mine went if I had my head under the car I could hear the noise was coming from in front of the mufflers, had to be the cats.
     
  5. PinkieT

    PinkieT Well-Known Member

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    Thumped the car's cats while the 4 leggers glared at me. Car cats are fine.
     
  6. ttocs

    ttocs Post Whore

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    now get a vid thumping the 4 leggers :). You want to count out that they are not the source after all.
     
  7. PinkieT

    PinkieT Well-Known Member

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    The 4 legged cats whine and hiss, but don't rattle. Wait, one of them is kinda stupid, so yes his head may rattle... But he wasn't in the car when were were driving.