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Flapper Valve.
Posted: Wed Feb 15, 2023 4:26 pm
by DaveB28
My exhaust flapper valve seized and a warning light has appeared on my dash. Headers were replaced under warranty last time it happened, but now its out of warranty BMW dont want to know unless I have £1600 to give them. Had a problem getting some of the screws out due to the restricted space and found this on Amazon
- 20230213_102751.jpg (911.34 KiB) Viewed 2350 times
- 20230213_102807.jpg (699.19 KiB) Viewed 2350 times
- 20230213_102758.jpg (556.03 KiB) Viewed 2350 times
for £17. Money well spent and flapper valve now working, until the next time. Anyone have any idea if the flapper can be removed? How easy is it to do? And will it effect any future MOT due to its emmissions? Many thanks
Re: Flapper Valve.
Posted: Wed Feb 15, 2023 4:55 pm
by burridge01
Not sure about removing it but it won't affect the mot.When mine went I replaced the whole system with Arrow headers and exhaust.All for a grand and never have to mess with it again
That's a tidy little set for the money,got a link
Re: Flapper Valve.
Posted: Wed Feb 15, 2023 6:22 pm
by Elkinell
Can't remember where I read it but the valve is more to do with getting around noise limits than emissions. There is a plug in bit of electrickery that goes under the seat that fools the canbus into not lighting up the fault if you disconnect the servo.
Re: Flapper Valve.
Posted: Wed Feb 15, 2023 6:50 pm
by David.
Disconnect the flap leaving it in the fully open position, remove the cables and actuator then fit a servo buddy to prevent the warning light on the dash coming on.
Re: Flapper Valve.
Posted: Wed Feb 15, 2023 7:18 pm
by DaveB28
Thanks for the advice folks really appriciate it. Here's the link for the mini wrench set
https://amzn.eu/d/99czprS
Re: Flapper Valve.
Posted: Wed Feb 15, 2023 7:34 pm
by burridge01
Cheers DaveB28
Re: Flapper Valve.
Posted: Wed Feb 15, 2023 7:43 pm
by Stu
Servo eliminator as David says
https://www.healtech-electronics.com/products/ese/
remove the cables and motor and leave the flap wide open
Re: Flapper Valve.
Posted: Wed Feb 15, 2023 10:18 pm
by Elkinell
David. wrote: ↑Wed Feb 15, 2023 6:50 pm
Disconnect the flap leaving it in the fully open position, remove the cables and actuator then fit a
servo buddy to prevent the warning light on the dash coming on.
THAT'S the fecker!
Re: Flapper Valve.
Posted: Wed Feb 15, 2023 11:31 pm
by Randyjaco
DaveB28 wrote: ↑Wed Feb 15, 2023 4:26 pm
My exhaust flapper valve seized and a warning light has appeared on my dash. Headers were replaced under warranty last time it happened, but now its out of warranty BMW dont want to know unless I have £1600 to give them. Had a problem getting some of the screws out due to the restricted space and found this on Amazon20230213_102751.jpg20230213_102807.jpg20230213_102758.jpg for £17. Money well spent and flapper valve now working, until the next time. Anyone have any idea if the flapper can be removed? How easy is it to do? And will it effect any future MOT due to its emmissions? Many thanks
I removed my entire flapper butterfly last year. The pivot still moves in place, but there is just no butterfly to restrict exhaust flow. It had no negative effect on performance. What did happen was that I got some minor popping sounds from time to time when shifting gears.
Re: Flapper Valve.
Posted: Thu Feb 16, 2023 8:29 am
by DaveB28
That sounds a good idea, as it did seem to be the flapper itself rather than the cables sticking. How did to get the flapper out?
Re: Flapper Valve.
Posted: Thu Feb 16, 2023 11:25 pm
by Randyjaco
I removed the muffler and used an electric die grinder. I was able to get the burr right along the pivot axel. Took about an hour to get it all off. There are probably easier ways.
Re: Flapper Valve.
Posted: Fri Feb 17, 2023 11:10 am
by DaveB28
Thanks for that, think I'll go with the healtec ese, a bit easier for a ludite like me.
Re: Flapper Valve.
Posted: Fri Feb 17, 2023 1:11 pm
by Elkinell
Seemed too good to miss, It should be here on Sunday. The thing I bought to make the order up so I got free postage is supposed to arrive today. If it does I'll put a picture up
Re: Flapper Valve.
Posted: Mon Feb 20, 2023 8:07 am
by Panman40
I noticed these recently, they look fairly well made for the money.
https://www.blackwidowexhausts.co.uk/r- ... 8275-p.asp
Re: Flapper Valve.
Posted: Mon Feb 20, 2023 8:42 am
by Stu
I have a set and they are well worth the money