Help: Rattling sound from the underbody

legion

digital agent
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#1
I'm hearing this crazy metal rattling sound coming from under my car. I have a 98 EX and a Greddy SP cat-back system. I checked down there and I don't see anything that could be causing the noise. I think I may have narrowed it down to be the middle part of the exhaust system (the sound suppressor or something, the thick part between the headers and muffler) - it seems to be coming from the inside of it, but I'm not sure. Any thoughts? Thanks guys!
 

Sammo115

It be me, Sammo
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#3
happen to me, and it was my catalytic converter, if u changed it. its the honey-comb thing inside the cat, it probably broke, need to take it off and get rid of the broken piece, and now its should be better.
 

SickCiViC

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#4
could be anything. not just "heat shield".

my bud was told "heat shield" when his was doing it.. by a repair shop, and it turned out to be in his muffler.
 


CiviKid

Post Whoralicious
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#7
sickcivic you post whore...lol I have this same probelem when i shake my exhaust it sounds like the heatsheild...how can you fix this problem?
 

rey rey

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#8
my noise started right after I installed my muffler the extra weight made it shake.
 

vampire

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#9
Chances are it's the heatshield. Couple of mechanics told me to throw it out. One honda dealer told me that it'll cost me $100 to replace it. Another mechanic told me it's just $30 to replace it, but he finally just had to tighten the bolts holding it & he also put in a clamp. It was done for free with my oil change. I guess I was lucky.
 




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