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      03-29-2020, 04:26 PM   #1
Wilhnip
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Knocking sound help

My 2007 bmw 335i e90 149000km started to make a very strange noise, yesterday I was driving along the highway at about 100kph and started to hear this knocking noise at higher rpms. Here's a video from idle with some revs

Inside: https://www.youtube.com/watch?v=Kj88...ature=youtu.be
From outside: https://www.youtube.com/watch?v=dVU2...ature=youtu.be

Seems to start around 2k and only gets worse

I'm not the most knowledgeable on this stuff, just looking for some ideas on what could be the problem with my car. Appreciate any replies, i'm ready to hear the worst.


some background info:
Bought the car October 2019 137000km
Put in a 7" fmic, DCI, Vrsf cp, new dvs, new ngk spark plugs, new boost solenoids, new silicone vac lines and vrsf downpipes.
Oil: liqui moly 0w40

I tuned the car with MHD and their stage 1+ map, the car ran great, made 14-19 psi consistently and smoothly the car felt amazing and I loved it, this lasted for about a week then it started to make half the boost target, i've been chasing this problem down for about 3 months, you'll notice in the videos that my wastegate rattle is pretty bad, I brought it to a shop last week to have them look at the turbos/wastegate arms and they said they vac tested them and they held closed for 15mins without leaking. Still only hitting around 8-10 psi according to mhd and the car does feel like it's hesitating at lower rpms and really struggles to build boost, this was the main issue but then this knocking started to happen.
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      03-29-2020, 05:50 PM   #2
E92.Dom
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      03-29-2020, 06:27 PM   #3
ragingpanda
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Rod knock
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