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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N54 Turbo Engine / Drivetrain / Exhaust Modifications - 335i > How bad is it?



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      05-11-2016, 06:54 PM   #1
Jewel's335i
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How bad is it?

Rattling noise from about 700 rpm to 1000 rpm I have a slight rattle when I first take off from a stop and sometimes when I'm rolling slow almost to a stop it rattles as well. It's coming from this area in the picture. How bad is it? What am I looking at? Transmission failing? No codes. Just a rattle and it's very inconsistent. Any ideas?
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      05-11-2016, 07:16 PM   #2
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Stock DMFW? How many miles? How much power?
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      05-11-2016, 07:18 PM   #3
Jewel's335i
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Quote:
Originally Posted by Jeff@TopGearSolutions
Stock DMFW? How many miles? How much power?
Stock stock stock with 71k
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      05-11-2016, 07:20 PM   #4
Jewel's335i
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Quote:
Originally Posted by Jewel's335i
Quote:
Originally Posted by Jeff@TopGearSolutions
Stock DMFW? How many miles? How much power?
Stock stock stock with 71k
I was running aggressive stage 1 Cobb tune for a while but I haven't had it in since I've had my turbos replaced by BMW.
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      05-11-2016, 07:25 PM   #5
Jewel's335i
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Quote:
Originally Posted by Jeff@TopGearSolutions
Stock DMFW? How many miles? How much power?
It a slight rattle kinda sounds like wastegate rattle but in this location. It happens only after the car is warmed up and only happens sometimes when I press on the peddle from a stop and sometimes on deceleration. It also happens sometimes when I'm in neutral and I can press the peddle slightly and it will rattle. Like I said very inconsistent and drives and shifts normal. Very annoying
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      05-11-2016, 07:26 PM   #6
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Are you sure its not your wastegates failing?
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      05-11-2016, 07:27 PM   #7
Jewel's335i
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Quote:
Originally Posted by Clownaround
Are you sure its not your wastegates failing?
Literally only 500 miles on my new turbos. I know this is the location because I jacked it up and had someone press the peddle slightly like I said and got it to rattle. This is the location it's coming from for sure
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      05-11-2016, 07:37 PM   #8
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Maybe its the heat shield to the turbos. I have a slight rattle that only happens around 900 RPM and 2k RPM. It doesn't do it while sitting, and when im driving if I press the clutch in and rev I don't hear it either. Only when I am in gear.

Changed turbos recently as well.
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      05-11-2016, 08:12 PM   #9
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Quote:
Originally Posted by pysical
Maybe its the heat shield to the turbos. I have a slight rattle that only happens around 900 RPM and 2k RPM. It doesn't do it while sitting, and when im driving if I press the clutch in and rev I don't hear it either. Only when I am in gear.

Changed turbos recently as well.
I posted a video of it I'll post it again. Doesn't sound like a heat shield
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      05-11-2016, 08:13 PM   #10
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      05-11-2016, 09:05 PM   #11
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Is this MT? Throwout bearing and fork.
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      05-11-2016, 09:05 PM   #12
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Quote:
Originally Posted by feuer
Is this MT? Throwout bearing and fork.
Automatic trans
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      05-11-2016, 10:25 PM   #13
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loud injectors?
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      05-11-2016, 10:41 PM   #14
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Quote:
Originally Posted by cochran
loud injectors?
Index 12 injectors and injectors are a ticking noise not this rattle noise
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      05-11-2016, 11:16 PM   #15
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This might be a stupid assumption but if one my vacuum lines was pinched or cut would it make a rattle sound????
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      05-11-2016, 11:36 PM   #16
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Quote:
Originally Posted by Clownaround
Are you sure its not your wastegates failing?
Come to think about it I'm not entirely 100% sure where the noise is coming from. The tranny shifts and drives normal. My boost solenoids? If these go bad or any vacuum lines go bad this would cause even brand new turbo wastegates to rattle correct?
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      05-11-2016, 11:55 PM   #17
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Quote:
Originally Posted by Clownaround
Are you sure its not your wastegates failing?
Well my boost solenoid or plural are going bad. I had that strange assss humming sound as well coming from the vacuum line/ solenoid area by the vacuum canisters.
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