Exhaust Question
Exhaust Question
I have a stock exhaust on my 3.0 Z3, and I see no real reason to upgrade as the noise is lovely at high revs and quiet and domestic at low speed. However is there anyway to disable the valve that keeps it quiet? the valve that you can hear open between 2800 and 3300 RPM?
Any help would be much appreciated.
Any help would be much appreciated.
Re: Exhaust Question
pull the vacume pipe off and shove a golf tee in it the default position for the valve is open
Re: Exhaust Question
Is this an April fools joke or can somebody explain. I have owned my 3.0 litre since new and haven't a clue as to what exhaust noise is being discussed. What have I missed? Lol
Don't drink and drive home -
Take the Zd and fly home -
Take the Zd and fly home -
-
- Joined: Fri 18 Apr, 2008 19:24
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Re: Exhaust Question
I've no idea what the answer is, but......... your car looks MINT!
we expres: " He did hear the bells ringing, but doesnt know where where the clapper hangs".
- BladeRunner919
- Joined: Fri 17 Feb, 2012 20:18
- Posts: 2225
Re: Exhaust Question
The 6 cylinder cars that still have a genuine exhaust have a small flap inside one of the two tailpipes (thought they have normally seized up anyway).kruisn wrote:Is this an April fools joke or can somebody explain. I have owned my 3.0 litre since new and haven't a clue as to what exhaust noise is being discussed. What have I missed? Lol
- Southernboy
- Joined: Thu 07 Oct, 2010 12:39
- Posts: 6436
- Location: Johannesburg
Re: Exhaust Question
The vacuum operated flap in the one pipe is designed to reduce noise in the "urban" driving environment and also to improve fuel consumption - according to BMW.
As stated above, one can disable the flap by pulling the rubber hose off and sealing it with a golf tee pushed into the hose.
Under normal operating that flap opens above a predetermined RPM to allow the higher volume of exhaust gasses to escape. By disabling the system one gets a louder and deeper exhaust note. TBH, I tried it and quite liked the note - for a while... but then re-connected it because the drone at low speed became intrusive.
For anyone wanting to do the disabling mod, the hose referred to is under the car at the back where the rear silencer box is located.
As stated above, one can disable the flap by pulling the rubber hose off and sealing it with a golf tee pushed into the hose.
Under normal operating that flap opens above a predetermined RPM to allow the higher volume of exhaust gasses to escape. By disabling the system one gets a louder and deeper exhaust note. TBH, I tried it and quite liked the note - for a while... but then re-connected it because the drone at low speed became intrusive.
For anyone wanting to do the disabling mod, the hose referred to is under the car at the back where the rear silencer box is located.
Re: Exhaust Question
Thank you all very much for your help southernboy
and I'm pretty sure the only reason its doing my head is that is nearly seized and as it changes from closed to open there's a detestable rattly raspy noise. and its right on the comfortable part of the mid range revs!
it doesn't look so mint atm... very very dirty...
and I'm pretty sure the only reason its doing my head is that is nearly seized and as it changes from closed to open there's a detestable rattly raspy noise. and its right on the comfortable part of the mid range revs!
it doesn't look so mint atm... very very dirty...
Re: Exhaust Question
is this exhaust valve fitted to the 2.2 models?
regards
regards
Re: Exhaust Question
Many Thanks Southern Boy. I would think my car valve has not rusted solid as it has only done 31250 ks. I am going to take up golf so I can buy a suitably high tech golf tee (in matching colour of course) and shove it up the tube.
Don't drink and drive home -
Take the Zd and fly home -
Take the Zd and fly home -
Re: Exhaust Question
I was wanting to do this mod on my Z3 3.0 but can't find it. Any pics would help.
- Southernboy
- Joined: Thu 07 Oct, 2010 12:39
- Posts: 6436
- Location: Johannesburg
Re: Exhaust Question
Re: Exhaust Question
Guys info please is this also on pre face lift 2.8? thank you in advance.
Bazza (East Dorset)
- Southernboy
- Joined: Thu 07 Oct, 2010 12:39
- Posts: 6436
- Location: Johannesburg
Re: Exhaust Question
Hi Bazza..... short answer - No.
Re: Exhaust Question
In the picture there is a frayed hose which gets capped off by the golf tee. Understand that. I cannot however see how the hose connects to the 'cap'. I was expecting a male/female type arrangement. I would like to try this but worried how it all goes back together. Not clear from picture. Thanks
- Southernboy
- Joined: Thu 07 Oct, 2010 12:39
- Posts: 6436
- Location: Johannesburg
Re: Exhaust Question
The hose slips over a small steel tube coming out of that valve... simply give it a tug - it'll slip off... as you see the hose doesn't even have a clamp on it....
Re: Exhaust Question
I know I am labouring the point but where is the small steel tube then.
Re: Exhaust Question
in the pic its inside the end of the braided hose where it joins on to the metal diaphragm housing just pull it off can southernboy circle it for him
- Southernboy
- Joined: Thu 07 Oct, 2010 12:39
- Posts: 6436
- Location: Johannesburg
Re: Exhaust Question
The tube is still connected to the pipe in the pic I posted.... as I said, I had tried it disconnected and plugged, but I found the noise too much at low speed and re-connected it again... hope that clears up any confusion...
Re: Exhaust Question
Ok and thanks
Re: Exhaust Question
THANKS for reply shame thouSouthernboy wrote:Hi Bazza..... short answer - No.
Bazza (East Dorset)
- Southernboy
- Joined: Thu 07 Oct, 2010 12:39
- Posts: 6436
- Location: Johannesburg
Re: Exhaust Question
........ My apology Bazza.... no rudeness intended.
Re: Exhaust Question
Did it this afternoon and I am chuffed! A slightly deeper note and a nicer noise up to 3500 as now it doesn't have a rasping valve!
Are the tail pipes removable for a good clean on the stick exhaust?
Many thanks
Are the tail pipes removable for a good clean on the stick exhaust?
Many thanks
Re: Exhaust Question
PM sent re your post Zed-dan
Re: Exhaust Question
Re: Exhaust Question
Thanks for that. Had a quik feel under last weekend and could feel what is shown in the picture. Will have a proper look tomorrow. Would you know if all 3.0i Zs should have what is shown in the picture. Thanks.
Re: Exhaust Question
Its on all STOCK 3.0i exhausts.
Re: Exhaust Question
Ok. Thanks.
Re: Exhaust Question
think its on the 2.8 too but as ours has a stainless system I cant check. my 2.5 z4 has it too
Re: Exhaust Question
I have read somewhere that the flap was not fitted to the autos but I may be wrong. Ours hasn't got the valve but the vacuum solenoid is fitted in the well behind the rear wheel.
Brian
3.0I Topaz Blue
2000 E36/7 Z3 3.0i
2016 F31 335d
2015 F21 118i
3.0I Topaz Blue
2000 E36/7 Z3 3.0i
2016 F31 335d
2015 F21 118i
Re: Exhaust Question
In Zed-dan's picture is that the vacuum solenoid as opposed to the valve?
Re: Exhaust Question
No John that is the valve. the solenoid has electric wire and the small pipe to and from it. I think it was under the tilt alarm sensor l hand side boot in the well behind the rear wheel.johnz3 wrote:In Zed-dan's picture is that the vacuum solenoid as opposed to the valve?
Brian
3.0I Topaz Blue
2000 E36/7 Z3 3.0i
2016 F31 335d
2015 F21 118i
3.0I Topaz Blue
2000 E36/7 Z3 3.0i
2016 F31 335d
2015 F21 118i
Re: Exhaust Question
Thanks. Learning all the time ......
Re: Exhaust Question
had a play in my 2.2 on the way back from its MOTin 3rd @ 2K rpm not a lot but upping it to 3-4k the exhaust note changed a lot deeper
peter2b
peter2b
Re: Exhaust Question
I think this must be true as my 3.0 litre auto definitely does not have the valve or pipe.Brian4 wrote:I have read somewhere that the flap was not fitted to the autos but I may be wrong. Ours hasn't got the valve but the vacuum solenoid is fitted in the well behind the rear wheel.