Exhaust Rattle

atl1289 · 03-08-2024, 08:59 PM

Know this has been mentioned but wanted to ask what you guys thought of this rattle at idle in my exhaust for my f80 comp pkg.

It's apparent upon starting and revving and consistent throughout the drive. Can return the car if needed but wanted y'alls perspective on if it's wastegate or something else.

here's a vid:

https://www.youtube.com/shorts/7gVzuRUGX_s

wishbone · 03-09-2024, 08:37 AM

Have you checked all the clamps for tightness? Specifically, the tips...

Boznien · 03-09-2024, 10:12 AM

Hard to tell with the video. We're also gonna need some more information to really dial in what the sound could be.
Is the exhaust stock?
Do you have a midpipe? Axleback? Downpipes?
Did you do the work yourself or did a shop do it?

gunsmoker · 03-09-2024, 11:40 AM

Also, does it happen with the flaps closed and not when they are open?

DayleeDriver · 03-09-2024, 01:33 PM

I had a rattle where the exhaust midpipe area was touching the center brace. Readjusted and now it’s gone.

NSX2M4 · 03-09-2024, 04:47 PM

On a cold start the exhaust valves will rattle a bit until warmed up. This happened even when new and a warranty visit solved nothing. They all do it. If it goes away after a few minutes, it's 100% normal.

Edit: just watched the vid and that is not normal.

03-08-2024, 08:59 PM	#1
atl1289 Registered 0 Rep 1 Posts Drives: f80 M3 Join Date: Mar 2024 Location: san francisco iTrader: (0)	Exhaust Rattle Know this has been mentioned but wanted to ask what you guys thought of this rattle at idle in my exhaust for my f80 comp pkg. It's apparent upon starting and revving and consistent throughout the drive. Can return the car if needed but wanted y'alls perspective on if it's wastegate or something else. here's a vid: https://www.youtube.com/shorts/7gVzuRUGX_s
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03-09-2024, 08:37 AM	#2
wishbone ///M 171 Rep 662 Posts Drives: '18 F80 M3 ZCP, '14 F30 328i Join Date: May 2017 Location: Raleigh, NC ITB iTrader: (12) Garage List 2014 BMW 328i [0.00] 2018 BMW M3 ZCP [9.00]	Have you checked all the clamps for tightness? Specifically, the tips... __________________ F80 ///M3 2018 / ZCP / executive / 6-speed / nav F30 328i 2014 / dinan sport kit / premium pkg / 6-speed / nav / hex trim / HK sound / B14 coilovers / oem roof rack / active autowerke exhaust / eventuri CAI
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03-09-2024, 10:12 AM	#3
Boznien Private 74 Rep 69 Posts Drives: 2018 BMW M3 ZCP (Avus Blue) Join Date: Apr 2020 Location: Chicagoland iTrader: (0) Garage List 2018 BMW M3 [9.50]	Hard to tell with the video. We're also gonna need some more information to really dial in what the sound could be. Is the exhaust stock? Do you have a midpipe? Axleback? Downpipes? Did you do the work yourself or did a shop do it? __________________ 2018 BMW M3 ZCP - Avus Blue - DCT 2014 BMW 328i xDrive - Black Sapphire - FBO Stage 2+ (SOLD) 1995 BMW M3 - Alpine White - 5MT Instagram: @boznien
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03-09-2024, 11:40 AM	#4
gunsmoker Second Lieutenant 282 Rep 276 Posts Drives: 2016 M3 Join Date: Feb 2018 Location: Mansfield, MA iTrader: (1)	Also, does it happen with the flaps closed and not when they are open?
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03-09-2024, 01:33 PM	#5
DayleeDriver 2018 5 Rep 25 Posts Drives: BMW m3 Join Date: Mar 2020 Location: Chicago iTrader: (0) Garage List 2018 bmw m3 [0.00]	I had a rattle where the exhaust midpipe area was touching the center brace. Readjusted and now it’s gone.
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03-09-2024, 04:47 PM	#6
NSX2M4 Major 1384 Rep 1,345 Posts Drives: 2019 M4 ZCP- RIVIAN R1S QUAD Join Date: Jun 2019 Location: FTL, FL iTrader: (1)	On a cold start the exhaust valves will rattle a bit until warmed up. This happened even when new and a warranty visit solved nothing. They all do it. If it goes away after a few minutes, it's 100% normal. Edit: just watched the vid and that is not normal. __________________ MGM Ext, SO int, Euro IKON, CS front lip, Carbon 1.5 diffuser, GTS/CS coding, M perf rear spoiler, & everything else STOCK. (Previous E39 and NA1 NSX owner) Those were the days!
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