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BMW 3-Series (E90 E92) Forum > BMW E90/E92/E93 3-series General Forums > General E90 Sedan / E91 Wagon / E92 Coupe / E93 Cabrio > Crazy loud rattle after downpipe install



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      01-26-2021, 07:23 PM   #1
Redn54
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Crazy loud rattle after downpipe install

Just installed catless dp’s and now I have this crazy loud rattle even at the slightest throttle and when I let off. Sounds way too loud to be the wastegates. Does it at idle too, link down below is the sound and my video. Please help. Thank you in advance.

https://youtube.com/shorts/AKgh4zf-0nY
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      01-26-2021, 07:59 PM   #2
Livinlife335i
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Make sure your pipes aren't touching anything that will make it rattle if it is anywhere.
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      01-26-2021, 10:26 PM   #3
TunafishE93
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Sounds like a possible leak.
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      01-27-2021, 08:34 AM   #4
clegg
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Agree on possible leak. Did you check or replace the seals/gaskets at the turbos and to the exhaust system?
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