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BMW 3-Series (E90 E92) Forum > BMW E90/E92/E93 3-series General Forums > Regional Forums > UK > UK Technical Forum > swirl flaps



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      07-01-2013, 03:34 PM   #1
spritzer
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swirl flaps

Hi just wondered if i have swirl flaps fitted on my 325d M57 N2 engine year 2008.Any advise appreciated
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      07-02-2013, 04:35 AM   #2
oldbilly
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IMO there is a much scare mongering over the swirl flaps and really affects the the earlier swirl flaps on the e46 which tended to get ingested into the engine with catastrophic results, although many will tell you to change them for blanks irrespective of what type you have, the flaps are designed for purpose and help with swirl and tumble combustion technology throughout the rev range, the later type e90 2005 ish on play a greater part with ecu software the later revised cartridge swirl flaps seems to have resolved the problem with no known failures that I know of although the seals on the cartridge themselves can leak as the mileage rises and can be re-sealed but many owners still delete them for the blanks, some of those who have changed them have notice a slight hesitation in the lower rev range and others nothing at all, my 2006 330d has done 140k and the originals albeit re sealed are still installed.

Last edited by oldbilly; 07-03-2013 at 03:46 AM.
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      07-02-2013, 05:16 AM   #3
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What do you recommend to seal the swirl flap cartridges? I need to remove the manifold to change a glowplug and check an oil leak from the rhs of the engine. I may clean up the manifold an egr valve at the same time.
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      07-02-2013, 11:03 AM   #4
oldbilly
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have look here! http://www.e90post.com/forums/showth...&highlight=egr

http://www.e90post.com/forums/showth...light=what+egr

Last edited by oldbilly; 07-02-2013 at 11:08 AM.
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      08-08-2013, 03:54 PM   #5
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No flaps on the 325D, only on the 330d M57N2.
You can check them on the left side on the inlet manifold, normally it is possible to see the flaps, I think you don't have them.
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      10-23-2013, 06:09 PM   #6
andyz0
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Sorry to reopen this post... but my local indi specialist advised me to blank my swirl flaps. I have a 2007 320d msport. He told me about the damage they can cause... but is it just scare mongering? Is it a wise investment of 200 to prevent the problem ever occurring? They include reprogram of ECU to not look for the swirl flaps.

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      10-23-2013, 06:56 PM   #7
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Scaremongering on the E9X series IMO.
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      10-24-2013, 07:00 AM   #8
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not completely, there are leaks on e9x flaps. That won't destroy your engine but can damage alternator or glow plug module.
Don't know if the 320d has the swil flaps.
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      10-24-2013, 10:16 AM   #9
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Quote:
Originally Posted by andyz0 View Post
Sorry to reopen this post... but my local indi specialist advised me to blank my swirl flaps. I have a 2007 320d msport. He told me about the damage they can cause... but is it just scare mongering? Is it a wise investment of 200 to prevent the problem ever occurring? They include reprogram of ECU to not look for the swirl flaps.

Thanks
Andy
Take your car to another, more reputable Indy.
No reprogramming is required - you leave the actuator connected to the electronics and vacuum, but remove the actuating rod.

There have been instances of the later type flaps failing too - on the E6x engine anyway. I removed mine from my old 530d - no difference in performance but very slightly better fuel consumption.

Mike
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      10-24-2013, 04:56 PM   #10
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i removed mine on an 06 320D E91, and im glad i did, as the flaps i removed were very loose on the spindle, the metal rivets that held the flaps to the spindle had worn.

my car had done 180k at the time i removed them, so a fair old mileage, but its still worth noting that the problem isn't fixed on early E90's
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      10-25-2013, 06:54 AM   #11
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for every car it's better to remove them, you're going to sleep better after that ...
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      10-25-2013, 09:28 AM   #12
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Quote:
Originally Posted by Icekube View Post
i removed mine on an 06 320D E91, and im glad i did, as the flaps i removed were very loose on the spindle, the metal rivets that held the flaps to the spindle had worn.

my car had done 180k at the time i removed them, so a fair old mileage, but its still worth noting that the problem isn't fixed on early E90's
Balls. Thats my car, but closer to 190k, might get the kit then...
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