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Exhaust Sounds Like Its Blowing On Start Up
- RustyZ4
- Lifer
- Posts: 3622
- Joined: Fri Dec 14, 2007 7:23 pm
- Location: Maidstone, Kent
Exhaust Sounds Like Its Blowing On Start Up
I have the 2.0 twin turbo (2., which when I start it up from cold, it always sounds like the exhaust is blowing, this only lasts for a very short while, probably 30 seconds, but being my first turbo car, I wondered if this is something to do with that or if it is normal?
Z4 Mineral Grey, 28i MSport Auto, lots of goodies
Z4 E85 3.0, gone but now with son
Growing Old is Mandatory But Growing Up is Optional
Z4 E85 3.0, gone but now with son
Growing Old is Mandatory But Growing Up is Optional
- Smartbear
- Lifer
- Posts: 13685
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- Location: a barn in Somerset
Exhaust Sounds Like Its Blowing On Start Up
Hi, it’s normal for the twin scroll turbo cars to sound like that-I think it’s emission based activity & soon sounds normal as you’ve noticedRustyZ4 wrote: ↑Sat May 05, 2018 3:43 pm I have the 2.0 twin turbo (2., which when I start it up from cold, it always sounds like the exhaust is blowing, this only lasts for a very short while, probably 30 seconds, but being my first turbo car, I wondered if this is something to do with that or if it is normal?
Rob
e89 Sdrive 20i, plenty of mumbo & good economy-the thinking bears z4
e89 Sdrive 30i, this ones busted, pass me another...
e85 3.0si sold
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Exhaust Sounds Like Its Blowing On Start Up
I was wondering the exact same thing today on mine! I guess as the roof is down a lot at the moment I'm noticing it more. Good to know it's normal.
Mineral grey E89 2.0M sport 2015
- RustyZ4
- Lifer
- Posts: 3622
- Joined: Fri Dec 14, 2007 7:23 pm
- Location: Maidstone, Kent
Exhaust Sounds Like Its Blowing On Start Up
Thanks Rob, I thought it was, but just worth checking
Russell
Russell
Z4 Mineral Grey, 28i MSport Auto, lots of goodies
Z4 E85 3.0, gone but now with son
Growing Old is Mandatory But Growing Up is Optional
Z4 E85 3.0, gone but now with son
Growing Old is Mandatory But Growing Up is Optional
- Stuartt
- Senior Member
- Posts: 1787
- Joined: Sat Dec 20, 2014 10:21 pm
- Location: Southend Essex
Exhaust Sounds Like Its Blowing On Start Up
I was reading somewhere that it’s the flap in the exhaust opens on startup with the roof down making it sound nice and throaty
Stuart
Stuart
2004 3.0i SE Roadster , GONE to a good home
2010 e89 35i Sdrive M sport. GONE for salvage but has been reborn
2014 e89 35is M-Sport Design Pure Traction
2010 e89 35i Sdrive M sport. GONE for salvage but has been reborn
2014 e89 35is M-Sport Design Pure Traction
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- Senior Member
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Exhaust Sounds Like Its Blowing On Start Up
I thought that also, although it does it first thing in the morning when the engine is cold and roof up, I just put it down to the flap being initially open. Don't know for how long though.
2011 E89 sDrive20i
- Smartbear
- Lifer
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Exhaust Sounds Like Its Blowing On Start Up
There is a flap in the exhaust as mentioned, but it’s at the rear silencer end-the “blowing sound” the op noticed is by the turbo at the engine end I think?ihadablackdog wrote: ↑Sun May 06, 2018 4:11 pmI thought that also, although it does it first thing in the morning when the engine is cold and roof up, I just put it down to the flap being initially open. Don't know for how long though.
Rob
e89 Sdrive 20i, plenty of mumbo & good economy-the thinking bears z4
e89 Sdrive 30i, this ones busted, pass me another...
e85 3.0si sold
- Nick9one1
- Member
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- Joined: Thu Dec 28, 2017 12:48 am
- Location: Newark, Nottinghamshire
Exhaust Sounds Like Its Blowing On Start Up
I get the same with mine.
I dont like the sound at all.. to me it doesn't sound sporty but just like a blowing exhaust.
It lasts for 20-30 secs, less if its a hot day and only from cold. Its almost like its running with the choke open!
I realised my exhaust flap was seized (and the PO had done the golf tee mod). I've reconnected it freed it up but it still doesn't seem to operate.
If I close the flap by hand and start the car it sounds much better. Might be worth investigating on yours too?
I dont like the sound at all.. to me it doesn't sound sporty but just like a blowing exhaust.
It lasts for 20-30 secs, less if its a hot day and only from cold. Its almost like its running with the choke open!
I realised my exhaust flap was seized (and the PO had done the golf tee mod). I've reconnected it freed it up but it still doesn't seem to operate.
If I close the flap by hand and start the car it sounds much better. Might be worth investigating on yours too?
Z4 35i Space Gray, Red Leather
Stepped Intercooler
De-Cat Downpipes
HKS SSQV
MHD 98RON Stage 2+
395 BHP
Stepped Intercooler
De-Cat Downpipes
HKS SSQV
MHD 98RON Stage 2+
395 BHP
- Diego_F
- Newbie
- Posts: 18
- Joined: Mon May 14, 2018 11:27 am
Exhaust Sounds Like Its Blowing On Start Up
Same here. I also realized that there is a flap in my right exhaust that seems to be always open. I took a picture. My concern is if I could have any problems in vehicle inspections. I don't have problems with the sound.Nick9one1 wrote: ↑Mon May 14, 2018 9:24 am I get the same with mine.
I dont like the sound at all.. to me it doesn't sound sporty but just like a blowing exhaust.
It lasts for 20-30 secs, less if its a hot day and only from cold. Its almost like its running with the choke open!
I realised my exhaust flap was seized (and the PO had done the golf tee mod). I've reconnected it freed it up but it still doesn't seem to operate.
If I close the flap by hand and start the car it sounds much better. Might be worth investigating on yours too?
2012 E89 sDrive35is Black Sapphire
- Nick9one1
- Member
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- Joined: Thu Dec 28, 2017 12:48 am
- Location: Newark, Nottinghamshire
Exhaust Sounds Like Its Blowing On Start Up
Can you move the flap by hand?
I wouldn't think it will cause a problem with vehicle inspections.
I wouldn't think it will cause a problem with vehicle inspections.
Z4 35i Space Gray, Red Leather
Stepped Intercooler
De-Cat Downpipes
HKS SSQV
MHD 98RON Stage 2+
395 BHP
Stepped Intercooler
De-Cat Downpipes
HKS SSQV
MHD 98RON Stage 2+
395 BHP
- Diego_F
- Newbie
- Posts: 18
- Joined: Mon May 14, 2018 11:27 am
Exhaust Sounds Like Its Blowing On Start Up
I may try. Is it possible just pulling it with something that fits there? Would then be closed all the time? Maybe something is disconnected and the flap doesn't work.
2012 E89 sDrive35is Black Sapphire
- Nick9one1
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- Location: Newark, Nottinghamshire
Exhaust Sounds Like Its Blowing On Start Up
There's an arm that comes out the side of the exhaust. You should be able to push it with your finger in the direction of the arrow.
Also check the vacuum hose is connected (marked in red on the photo).
.
https://photos.app.goo.gl/ZE5YJAyFpj8p24jd2
Also check the vacuum hose is connected (marked in red on the photo).
.
https://photos.app.goo.gl/ZE5YJAyFpj8p24jd2
Z4 35i Space Gray, Red Leather
Stepped Intercooler
De-Cat Downpipes
HKS SSQV
MHD 98RON Stage 2+
395 BHP
Stepped Intercooler
De-Cat Downpipes
HKS SSQV
MHD 98RON Stage 2+
395 BHP
- Silverzedtom
- Senior Member
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- Joined: Sun Jan 15, 2017 8:19 pm
- Location: East Sussex
Exhaust Sounds Like Its Blowing On Start Up
i think a few owners disconnect the flap on the e89 for the sound. Try searching ‘golf tee mod’ and you’ll be able to identify if that was done by a previous owner.
E85 2.5si
F55 Cooper S
F55 Cooper S
- Diego_F
- Newbie
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- Joined: Mon May 14, 2018 11:27 am
Exhaust Sounds Like Its Blowing On Start Up
Thank you for the info. Here is a picture of mine:Nick9one1 wrote: ↑Tue May 15, 2018 2:21 pm There's an arm that comes out the side of the exhaust. You should be able to push it with your finger in the direction of the arrow.
Also check the vacuum hose is connected (marked in red on the photo).
IMG_20180515_141659.jpg.
https://photos.app.goo.gl/ZE5YJAyFpj8p24jd2
It seems to be connected, at least from this side.
2012 E89 sDrive35is Black Sapphire
- Diego_F
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Exhaust Sounds Like Its Blowing On Start Up
I just saw now the video. I guess the flap is closed, then you press the lever and it opens and closes again. Is that true? Or is just the oposite?
Edit: I tried in mine and pulling that lever closes the flap and releasing closes it again
Last edited by Diego_F on Tue May 15, 2018 8:22 pm, edited 2 times in total.
2012 E89 sDrive35is Black Sapphire