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      04-03-2014, 10:09 PM   #1
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Low RPM noise - Wastegate issue?

***EDIT**Problem solved - installed new gaskets and got rid of the noise anomaly
BMS filters, charcoal filter delete, Akrapovic exhaust
Low rpm noise that I noticed while in the garage; it doesn't seem to be a rattle or flutter noise - more like a high pitched whining noise
I tried changing between Sport+, Sport, and Eco modes and noise didnt really change.
Can anyone confirm if normal or abnormal? Is that whirling noise just turbines?
Thanks!

Listen with HD quality and headphones if possible.
http://youtu.be/B2NuJvwyURM

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Last edited by Day Laborer; 04-10-2014 at 10:15 PM..
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      04-04-2014, 08:23 AM   #2
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can you make a video from underneath the car? just leave your phone under the car and rev it to 2-2.5k rpms and let off the throttle

i will upload my videos later as well

i think i need to change gaskets again
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      04-04-2014, 09:35 AM   #3
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What is your build date?

I have a similar noise but its strictly between 1000 and 1200 RPM
I also have an Akra.
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      04-04-2014, 11:09 AM   #4
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I'll make another video this weekend- I had the akra installed when I had about 1000 miles on the car; I reused the gaskets since the car was still so new.

I also have these noises strictly between 1000-1200 rpm, a little faint and only occurs when the car is warmed up.


Build date is April 2013
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Last edited by Day Laborer; 04-05-2014 at 09:31 PM..
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      04-04-2014, 12:25 PM   #5
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Quote:
Originally Posted by Day Laborer View Post
I'll make another video this weekend- I had the akra installed when I had about 1000 miles on the car; I reused the gaskets since the car was still so new.

I also have these noises strictly between 1000-1200 rpm, very faint and only occurs when the car is warmed up.


Build date is April 2013
yep
99.9% u need new gaskets

i changed my gaskets after i changed dp's and rattle was gone, but i havent done it on the lift, i have done with jacks, so i guess my gaskets didn't sit tight and my rattle started to appear at some point and then it just became loud! so i need to change my gaskets again but car sitting straight on the lift
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      04-04-2014, 01:22 PM   #6
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Quote:
Originally Posted by mstmng View Post
yep
99.9% u need new gaskets

i changed my gaskets after i changed dp's and rattle was gone, but i havent done it on the lift, i have done with jacks, so i guess my gaskets didn't sit tight and my rattle started to appear at some point and then it just became loud! so i need to change my gaskets again but car sitting straight on the lift
Thanks - the gaskets between the Akra exhaust and the downpipes right?
Let me know if you have the part number too!

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      04-04-2014, 01:24 PM   #7
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Quote:
Originally Posted by Day Laborer View Post
Thanks - the gaskets between the Akra exhaust and the downpipes right?
Let me know if you have the part number too!

http://www.realoem.com/bmw/showparts...52&hg=18&fg=10

Part #7 on the diagram is what you are looking for
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      04-04-2014, 01:57 PM   #8
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Always change seals/gaskets. As soon as they seated they shouldn't be reused. It's simply best practice. IMO.
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      04-05-2014, 01:25 PM   #9
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Quote:
Originally Posted by mstmng View Post
yep
99.9% u need new gaskets

i changed my gaskets after i changed dp's and rattle was gone, but i havent done it on the lift, i have done with jacks, so i guess my gaskets didn't sit tight and my rattle started to appear at some point and then it just became loud! so i need to change my gaskets again but car sitting straight on the lift
I will try to investigate this next time I'm on the rack.
But the sound is not a rattling....its literally a whirling/whistling.
Could be gaskets, but it sounds like some sort of a pump motor bearing noise to me.
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      04-05-2014, 03:20 PM   #10
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You have an Akra exhaust with stock downpipes, right?

In that case, it can't be the gaskets. You probably have an exhaust leak. Which can be solved rather easily. The car needs to be put up on a lift, and while the engine is running and revving, a mechanic under the car will identify the source of the exhaust leak and correct by adjusting the fit of the exhaust pipes.
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      04-05-2014, 05:47 PM   #11
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Quote:
Originally Posted by avlnch
You have an Akra exhaust with stock downpipes, right?

In that case, it can't be the gaskets. You probably have an exhaust leak. Which can be solved rather easily. The car needs to be put up on a lift, and while the engine is running and revving, a mechanic under the car will identify the source of the exhaust leak and correct by adjusting the fit of the exhaust pipes.
We put it on the the lift and tightened the akrapovic exhaust to the down pipes. Wasn't the case-
We then opened the hood and the noise got louder.

Noise is definitely coming from within the engine bay. 100%
I'm bringing it in for diagnosis soon. I'll keep you guys informed
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Last edited by Day Laborer; 04-05-2014 at 09:30 PM..
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      04-10-2014, 07:40 PM   #12
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***EDIT**Problem solved - installed new gaskets and got rid of the noise anomaly
Just put in new gaskets. Still need to drive the car around a bit more to let it set in.
Sounds seems to be a lot less now.
Keep ya'll updated soon, as the gaskets settle. I have a feeling this may have fixed the problem

Old video - noise


After installation of new gaskets
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Last edited by Day Laborer; 04-10-2014 at 10:16 PM..
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      04-10-2014, 10:17 PM   #13
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Quote:
Originally Posted by mstmng View Post
yep
99.9% u need new gaskets

i changed my gaskets after i changed dp's and rattle was gone, but i havent done it on the lift, i have done with jacks, so i guess my gaskets didn't sit tight and my rattle started to appear at some point and then it just became loud! so i need to change my gaskets again but car sitting straight on the lift
THANKS MSTMNG! you saved me a lot of time diagnosing this issue!
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      04-11-2014, 03:08 AM   #14
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Quote:
Originally Posted by Day Laborer View Post
THANKS MSTMNG! you saved me a lot of time diagnosing this issue!
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      07-20-2020, 06:18 PM   #15
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Late to the party, but is that old video available? I've got some rattling that's been happening over the last year.. and its driving me crazy.

I also have akra, and stock DP, and I didn't change the gasket when it was installed at around 15K..
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      07-21-2020, 01:44 AM   #16
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Did you change the gasket when you upgrade to akrapovic exhaust
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      07-22-2020, 01:08 PM   #17
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Quote:
Originally Posted by celicatoe46m3 View Post
Late to the party, but is that old video available? I've got some rattling that's been happening over the last year.. and its driving me crazy.

I also have akra, and stock DP, and I didn't change the gasket when it was installed at around 15K..
I no longer have the old video but I am confident that you are experiencing the same issue... sounds like a fluttering noise right?

Luckily with stock downpipes, you can swap out the gaskets from under the car, without having to remove the exhaust completely. Simply disconnect the exhaust from the downpipes and pull it backwards to allow some slack, replace the gaskets and ensure they seat properly
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      07-23-2020, 03:54 AM   #18
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Is there gaskets on bottom and top of downpipes? Ive replaced the donut ones on the bottom does anyone have a pic of the top ones where it bolts to turbo?
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