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BMW 3-Series and 4-Series Forum (F30 / F32) | F30POST > Technical Forums > N20, N26, B46, B48 Turbo Engine / Drivetrain / Exhaust Modifications > N20 Noise
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      01-28-2020, 04:14 PM   #1
omicarlo
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N20 Noise

I have a 2012 328i with n20 Motor and every-time I start it in the morning I hear a noise from the engine like a fan is running but the main fan in the front is off and it seems that noise is coming from the back end of the engine.

What can be issue here. Car has 40000 kms on it.
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      01-29-2020, 08:44 AM   #2
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Quote:
Originally Posted by omicarlo View Post
I have a 2012 328i with n20 Motor and every-time I start it in the morning I hear a noise from the engine like a fan is running but the main fan in the front is off and it seems that noise is coming from the back end of the engine.

What can be issue here. Car has 40000 kms on it.
Small exhaust leak? After it warms up maybe the small crack/space seals?
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      01-29-2020, 11:41 PM   #3
omicarlo
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Thanks for the Information, Will check this in few days
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      01-30-2020, 12:02 AM   #4
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Is it just a noise or do you feel a vibration as well?
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      02-06-2020, 05:44 PM   #5
omicarlo
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Quote:
Originally Posted by sspade View Post
Is it just a noise or do you feel a vibration as well?
Hey Sspade,

I can feel a vibration but its very minimal and only when pressing gas pedal.
I also wanted to share that yesterday the noise went away when I parked the car to open the garage door it was very quiet but then I turned the car off after parking and turned it back on to check and boom noise was back. I also have a funny noise like a fan is running in the back of the engine not sure why

Thanks
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      02-07-2020, 04:27 AM   #6
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Quote:
Originally Posted by omicarlo View Post
Quote:
Originally Posted by sspade View Post
Is it just a noise or do you feel a vibration as well?
Hey Sspade,

I can feel a vibration but its very minimal and only when pressing gas pedal.
I also wanted to share that yesterday the noise went away when I parked the car to open the garage door it was very quiet but then I turned the car off after parking and turned it back on to check and boom noise was back. I also have a funny noise like a fan is running in the back of the engine not sure why

Thanks
video would help
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      09-07-2021, 11:34 PM   #7
waxwing_f31
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OP, did you ever find out what it was? I think I'm hearing something similar from my 328xi with n20.
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      09-16-2021, 11:28 PM   #8
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I tought every model of F30 have this noise
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      09-24-2021, 02:19 PM   #9
JPierce63
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My 2014 328i has this same issue.
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      11-30-2021, 04:10 PM   #10
waxwing_f31
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Just the way it is...

Johnny230CT I think you hit the nail on the head! The answer I get from every pro and owner I talk to is that the N20 is just noisy as hell. It has taken me a while to get used to it, because I've never owned a car that makes as many funky noises as this one. For a little 4 banger, at least it pulls like a champ - especially when modified!
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