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      11-11-2020, 10:26 PM   #1
Karan
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BMW 335i N55 Making Weird Noise At High Boost

Hey guys, I have a 2011 335i that's making weird noises when near full boost. Current mods are BMS Intake, VRSF Intercooler, VRSF Charge pipe, VRSF Catless DP and a Stage2+ Tune with flames. Seems like a boost leak to me as the car isn't as fast as I was expecting as well. Let me know if anyone recognizes the sound and knows what it exactly is, any help is appreciated, thanks.

Here is a video of the sound

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      11-11-2020, 10:40 PM   #2
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You have log? Smoke test...
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      11-11-2020, 10:41 PM   #3
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Definitely sounds like a boost leak. Check for a coupler/clamp that came off on intercooler or charge piping
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      11-12-2020, 06:56 AM   #4
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Idk but the fireball coming out of your exhaust is great
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      11-12-2020, 08:22 AM   #5
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Quote:
Originally Posted by E92.Dom View Post
Idk but the fireball coming out of your exhaust is great
+1

What did you do to make to have flames?

No codes what's so ever hmm?
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      11-12-2020, 08:55 AM   #6
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I have the same EXACT SOUND. Let me know if you ever find out what it was, I thought there was an exhaust leak but it wasn't. Please let meknow if you ever find out what it is.
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      11-12-2020, 09:02 AM   #7
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This is 100% boost leak.
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      11-12-2020, 09:07 AM   #8
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Quote:
Originally Posted by NoGuru View Post
This is 100% boost leak.
Any idea by the sound where it could be leaking from?
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      11-12-2020, 09:09 AM   #9
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Quote:
Originally Posted by socal619 View Post
Quote:
Originally Posted by E92.Dom View Post
Idk but the fireball coming out of your exhaust is great
+1

What did you do to make to have flames?

No codes what's so ever hmm?
It's a Alpine N55 Stage 2+ Flame tune. Just my normal check engine light from the dp's and my adaptive headlight malfunction light
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      11-12-2020, 09:45 AM   #10
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Quote:
Originally Posted by Karan View Post
Any idea by the sound where it could be leaking from?
Engine bay!

You will have to investigate but my guess would be the charge system. Inlet or Outlet.
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      11-12-2020, 10:03 AM   #11
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This is what it sounds like to me
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      11-12-2020, 11:00 AM   #12
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Got to be great for the turbo..
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      11-12-2020, 07:18 PM   #13
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Quote:
Originally Posted by tomasp001 View Post
I have the same EXACT SOUND. Let me know if you ever find out what it was, I thought there was an exhaust leak but it wasn't. Please let meknow if you ever find out what it is.
The intercooler piping wasn't tight enough so it was leaking from there
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      11-13-2020, 07:41 AM   #14
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Quote:
Originally Posted by Karan View Post
The intercooler piping wasn't tight enough so it was leaking from there
You da Real MVP dude, I'll check it out!
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      11-13-2020, 06:56 PM   #15
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Quote:
Originally Posted by tomasp001 View Post
Quote:
Originally Posted by Karan View Post
The intercooler piping wasn't tight enough so it was leaking from there
You da Real MVP dude, I'll check it out!
Yeah bro check it out, So much boost i'm losing traction when i launch in a xdrive 😂
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