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Old 04-30-2021, 08:06 PM   #1
Eric.18RS
 
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Weird rattling buzzing noise when accelerating

So I recently got an x pipe installed and when i started driving it i start to hear rattling, something like when someones bass is real loud you hear the metal vibrating off the car. Not sure what it is. Any suggestions on what it could be? Thanks
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Old 04-30-2021, 08:20 PM   #2
HCI2000SS

 
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Was it welded or clamped together?
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Old 05-01-2021, 01:21 AM   #3
Eric.18RS
 
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Quote:
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Was it welded or clamped together?
It was welded
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Old 05-01-2021, 05:28 AM   #4
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It was welded
In that case it's really hard to say. Might want to try getting it on a lift and see if you can replicate the sound. I assume nothing else was changed on the exhaust?
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Old 05-01-2021, 09:43 AM   #5
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In that case it's really hard to say. Might want to try getting it on a lift and see if you can replicate the sound. I assume nothing else was changed on the exhaust?
Yeah nothing else changed just x pipe replacing the resonator
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Old 05-01-2021, 09:58 AM   #6
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Yeah nothing else changed just x pipe replacing the resonator
Gotcha. Very possible something got shifted or moved upon install, and now there's metal on metal somewhere. As long as what you're describing isn't some strange frequency or resonance from the x-pipe itself, then it seems logical that there's something rubbing or touching somewhere
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Old 05-08-2021, 11:26 PM   #7
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x-pipe here and while i didn't have a rattle at first a couple years ago, there is one lately. Seems to happen at idle ...and when accelerating from idle ...hard to hear it over the exhaust any other time.

All of the shielding around the exhaust is secure and dampened. I can't find anything loose related to the exhaust and it doesn't appear to touch anything. The sound appears to be originating up front somewhere.

The two secondary cats are mounted really close to eachother, but they seem welded apart so i can't imagine that they can touch eachother.

If it's not something internal to the exhaust system i have no clue what's causing it... maybe something resonating not near the ehxaust but due to it? I was worried torque converter was tapping the flywheel due to something coming loose. But it's very much related to the exhaust ...putting the car in idle/park lowers/stops the noise. Starting cold usually results in no rattle.
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Old 05-09-2021, 01:46 PM   #8
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found the source of mine. passenger primary cat brace mount cracked.
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