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      08-31-2019, 03:45 AM   #1
jpy1980
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Video: Weird Whirring/low Siren sounds at low rpms

Iím getting a weird whirring/siren like sound when accelerating. I can hear it only in low rpms and when Iím going fairly slow speeds. My engine is stock and my mods include a cat back exhaust, aftermarket wheels and coilovers.

Hereís a clip. Kind of hard to hear but itís the low pitched whir or hum.

Not sure if itís from the drive train or engine bay.

Need some input!

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      08-31-2019, 05:39 AM   #2
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Mine makes a low pitched drone when I'm moving slowly. The source of the noise is probably the differential and I'm told it's normal for this car.
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      08-31-2019, 11:21 AM   #3
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Quote:
Originally Posted by FlyingLow78 View Post
Mine makes a low pitched drone when I'm moving slowly. The source of the noise is probably the differential and I'm told it's normal for this car.
Is your sound a consistent tone or does it change as you accelerate?
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      08-31-2019, 03:32 PM   #4
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Turbo spooling?
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      08-31-2019, 10:20 PM   #5
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Hmm someone on a Facebook group just mentioned that it may be an exhaust cam bearing. Can anyone corroborate that statement? Very interesting.
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      09-01-2019, 06:43 PM   #6
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Quote:
Originally Posted by jpy1980 View Post
I’m getting a weird whirring/siren like sound when accelerating. I can hear it only in low rpms and when I’m going fairly slow speeds. My engine is stock and my mods include a cat back exhaust, aftermarket wheels and coilovers.

Here’s a clip. Kind of hard to hear but it’s the low pitched whir or hum.

Not sure if it’s from the drive train or engine bay.

Need some input!

Sounds like turbo whine between 2000-2700rpm.
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      09-05-2019, 12:41 PM   #7
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Quote:
Originally Posted by ssgm1x View Post
Sounds like turbo whine between 2000-2700rpm.
By George, I think youíre right. I changed my diff fluid thinking it was my diff but the sound persisted. Then I noticed that itís more prevalent in sport+ than in efficient. Also the sound is there when revving in neutral. Itís mainky between 1.5k to 2.5k rpm as well.

Is this normal? Doesnít seem so. I wonder if my turbos are going bad?
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      09-06-2019, 09:58 AM   #8
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Sounds like whiney turbos to me. Live with it until they get really loud.
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      09-06-2019, 10:22 AM   #9
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DCT whine?
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      09-06-2019, 11:57 AM   #10
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Quote:
Originally Posted by Narcosis View Post
DCT whine?
My car is a manual
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      09-06-2019, 11:57 AM   #11
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Quote:
Originally Posted by Kbueno View Post
Sounds like whiney turbos to me. Live with it until they get really loud.
Got it. What is real loud? haha
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      09-06-2019, 07:04 PM   #12
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Sounds like either the diff or the turbos to me
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      09-06-2019, 09:53 PM   #13
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Quote:
Originally Posted by Iceberg4 View Post
Sounds like either the diff or the turbos to me
I actually changed the diff fluid and the sound is the same. Iím pretty sure itís the turbo as the sounds are more pronounced when itís on sports plus than efficient.
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      09-07-2019, 05:30 PM   #14
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Quote:
Originally Posted by jpy1980 View Post
Quote:
Originally Posted by Kbueno View Post
Sounds like whiney turbos to me. Live with it until they get really loud.
Got it. What is real loud? haha
When it's loud at idle and sounds like a siren with the windows down.
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      09-07-2019, 11:05 PM   #15
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Quote:
Originally Posted by Kbueno View Post
When it's loud at idle and sounds like a siren with the windows down.
Ah thereís no sound at idle nor can I hear it when the windows are down. Itís mainly when the windows are up and Iím around 2k rpm to about 2.7k rpm and more so when at sport plus
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      09-08-2019, 10:50 AM   #16
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Quote:
Originally Posted by jpy1980 View Post
Quote:
Originally Posted by Kbueno View Post
When it's loud at idle and sounds like a siren with the windows down.
Ah there’s no sound at idle nor can I hear it when the windows are down. It’s mainly when the windows are up and I’m around 2k rpm to about 2.7k rpm and more so when at sport plus
Mine does the same...Had it checked by Dealer who indicated normal operation. I'm confident it's the bearing in the Turbo letting the wheel slowly hit the casing causing the siren noise. Others have said it's just a whiney turbo. It hasn't gotten any worse in the last 2 years so I'm living with it.
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