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General E46 Forum
This is the place to get answers, opinions and everything you need related to your E46 (sedan, coupe, convertible and wagon) BMW!

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Old 01-28-2016, 11:39 AM   #1
BBBoy323i
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What's this sound

I have this metallic buzzing sound, sounds like it's coming from the front of my engine. With this sound the rpms also dip. I only hear it in idle when the car is cold. My dad thinks its a loose heatshield but I think it's something different. Could it be the idler pulley? Thanks guys

Skip to around 40 seconds


Last edited by BBBoy323i; 01-28-2016 at 11:45 AM.
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Old 01-28-2016, 12:06 PM   #2
lllRazorlll
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Sounds like a fan cause of how it just stops but I could be wrong
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Old 01-28-2016, 01:33 PM   #3
Saintluk2
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poke around with a screw driver if it's the heat shield you'll know right away.
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Old 01-28-2016, 01:35 PM   #4
BBBoy323i
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Thanks guys, maybe I'll try the screwdriver trick
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Old 01-28-2016, 01:47 PM   #5
BKMrSteel
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Do you have an exhaust leak?
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Old 01-28-2016, 02:24 PM   #6
BBBoy323i
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Quote:
Originally Posted by BKMrSteel View Post
Do you have an exhaust leak?
I don't believe so. I picked up a generic OBD 2 reader and there were no codes, it would be good enough to pick that up right?
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Old 01-28-2016, 02:35 PM   #7
BKMrSteel
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Quote:
Originally Posted by BBBoy323i View Post
I don't believe so. I picked up a generic OBD 2 reader and there were no codes, it would be good enough to pick that up right?
Maybe, I just hear a flutter sound in the video. Could be nothing though. You can normally feel the air pumping out easily, just don't burn your self. I don't want to distract you though, fix the other thing before looking at my obscure comments haha.
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