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      11-20-2018, 06:56 AM   #3
Helmsman
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Drives: 2011 AW E90 M3 ZCP
Join Date: Mar 2014
Location: Stockholm, Sweden

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Plenty data incl videos on this guys and have (fortunately) not yet any personal experience, but from all the data shown the rod shell typically start to knock on the door between 2000-3000 rmp, assumingly where the "resonans" takes off. Knock "only" around idle I haven't seen is related to RB's, but there is a first time for everything I guess… Also as you can hear in the sillions of vid's the RB knock is pretty loud and typically can't be taken for anything else.
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