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Flap open or closed...
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- Senior Member
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- Joined: Thu Mar 08, 2018 9:56 pm
Flap open or closed...
ok, so silly question coming up:
Is the exhaust flap in only 1 pipe?
Is the exhaust more throaty with the flap open or closed?
Since my engine light came on, the car has had that exhaust noise all the time (all the noise, no performance!). When I poked it with my finger with the engine off, it seemed stuck closed?
Is the exhaust flap in only 1 pipe?
Is the exhaust more throaty with the flap open or closed?
Since my engine light came on, the car has had that exhaust noise all the time (all the noise, no performance!). When I poked it with my finger with the engine off, it seemed stuck closed?
2011 E89 sDrive20i
- Smartbear
- Lifer
- Posts: 13685
- Joined: Wed Feb 05, 2014 6:54 pm
- Location: a barn in Somerset
Flap open or closed...
The exhaust will be more vocal with the flap open, and yes it’s only in one pipe.
Rob
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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- Member
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- Location: Bexley, Kent
Flap open or closed...
Which leads to a stupid question from me
Is it worth getting a flap in the second pipe?
Is it worth getting a flap in the second pipe?
Current - E89 Z4 SDrive 3.0i - last of the normally aspirated six cylinders
Gone - E85 Z4 2.2 SE
Gone - E85 Z4 2.2 SE
- Nick9one1
- Member
- Posts: 299
- Joined: Thu Dec 28, 2017 12:48 am
- Location: Newark, Nottinghamshire
Flap open or closed...
Its probably restricting the performance if its stuck closed. Try using something like a screwdriver to force it open.
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
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- Member
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Flap open or closed...
The pipe with the flap has a bypass pipe so that even with the flap closed, there is always some exhaust gas escaping on the RHS. You really don't want to block both pipes with a flap as they fail anyway and are better bypassed.
Just done mine which had started to rattle. It's much better without it.
Just done mine which had started to rattle. It's much better without it.
- obewan
- Senior Member
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- Location: End of A590 cul de sac (South Cumbria)
Flap open or closed...
Well, every day is a learning day!
Just been out to check mine - I didn't know that
Just been out to check mine - I didn't know that
E89 2.0 SDrive MSport
Honda CB500F.
Gone but not forgotten E85 2.0 MSport
Honda CB500F.
Gone but not forgotten E85 2.0 MSport
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- Senior Member
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- Joined: Thu Mar 08, 2018 9:56 pm
Flap open or closed...
With mine it happened as soon as I collected from the dealer after they checked the fault code (going in Friday for further investigation), so I’m wondering if the car is doing it on purpose as part of its reduced power thing? Wouldnt open with my finger when engine off so need to check if its open with engine on.
The flap has sounded bit raspy recently so it might be goosed, but if its jammed shut I dont understand why I get all the loud noise. Need to check position with engine on.
The flap has sounded bit raspy recently so it might be goosed, but if its jammed shut I dont understand why I get all the loud noise. Need to check position with engine on.
2011 E89 sDrive20i
- Smartbear
- Lifer
- Posts: 13685
- Joined: Wed Feb 05, 2014 6:54 pm
- Location: a barn in Somerset
Flap open or closed...
You should be able to open the valve easily with your finger, it’s not attached to a very strong spring.ihadablackdog wrote: ↑Wed Jul 04, 2018 10:43 pm With mine it happened as soon as I collected from the dealer after they checked the fault code (going in Friday for further investigation), so I’m wondering if the car is doing it on purpose as part of its reduced power thing? Wouldnt open with my finger when engine off so need to check if its open with engine on.
The flap has sounded bit raspy recently so it might be goosed, but if its jammed shut I dont understand why I get all the loud noise. Need to check position with engine on.
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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- Senior Member
- Posts: 1130
- Joined: Thu Mar 08, 2018 9:56 pm
Flap open or closed...
I’ll push harder (ooooerr), it might be my finger is too weak!
2011 E89 sDrive20i
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- Senior Member
- Posts: 1130
- Joined: Thu Mar 08, 2018 9:56 pm
Flap open or closed...
I looked again last night and it was open. I was able to push it against the spring so thats good.
Its going in to the garage today so hopefully they can fix the engine fault and it will be ok again.
Gonna ask then to check the flap operation anyway whilst they have it in.
Its going in to the garage today so hopefully they can fix the engine fault and it will be ok again.
Gonna ask then to check the flap operation anyway whilst they have it in.
2011 E89 sDrive20i