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2010 2011 BMW 5 Series Forum F10 BMW 5-Series (F10) Forums Regional Forums UK N57 swirl flap delete
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      02-23-2024, 02:42 PM   #1
gtthree
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N57 swirl flap delete

Hi

My swirl flaps are reporting the code not able to close fully and at cold start up the engine is a little juddery.

Can I ask has anyone had their swirl flaps removed from a N57?

And if so were there any downsides particularly around reduction in torque and driveablity?

The delete is remove of the flaps and the rod and replacement with a single bung for the N57. Which is different to the M57.

Thanks
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      03-31-2024, 06:16 AM   #2
dennis3258
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I drive a 520d from 09/2010 and have been advised that the engine has an update and wouldn't be an option to remove the swirl flaps.
For the N57 I am not able too answer, but I take it these guys can,

https://www.darksidedevelopments.co....20consequences.
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      04-11-2024, 04:24 PM   #3
gtthree
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Update - I ended up getting them cleaned, they weren't too bad.

The issue was the actuator arm had broken, so the garage repaired it.

Car runs like it used to, maybe even slightly better but it could be placebo.

No further fault codes.

For others a new manifold for the N57 is £800 to £900 from BMW

From autodoc you can pick up a pierburg for between £350 and £400 depending on their discount level.

Or you can roll the dice on £130 ebay special......and pray.
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      01-20-2025, 04:57 PM   #4
broombroom
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gtthree thanks for the update.

Im in same position currently with the same cold start issue and swirl related code, genuine question why did you pay for someone to get in the intake manifold and clean the swirl flaps (which is a few hundred quid at least) instead of buying a new piersburg intake manifold for £350? Im split which route to take at the moment with mine
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      02-07-2025, 03:53 PM   #5
gtthree
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hi broombroom

I dont have a lot of time to do big repairs to my car (two kids, busy job) so as this could have been a large job I therefore used a garage.

I took my care to a garage i have used for a while and I know and trust. They were looking at it and took it off the manifold as part of their inspection.
During the inspection they discovered the actuator arm was broken so fixed the arm and whilst they were working they had a look and said they cleaned the inlet manifold but it wasnt bad.

So in a nutshell the inlet manifold didn't need replacing it was the actuator arm.
It was pretty rough on a cold start with the broken actuator arm.

If I'd have been replacing it myself and the actuator arm had been okay, I may have considered replacing the inlet manifold.

I could have rocked up with a replacement inlet manifold (big outlay if not correct assessment), but the car drove perfect after initial start up so I was not 100% convinced the manifold was needing replaced. Hence why I ask the garage to look at it.

Hope that helps.
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