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![]() | Home > Technical > Serious Engine problem, something to be aware of |
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ad210358 Member Since: 12 Oct 2008 Location: Here and There Posts: 7464 ![]() ![]() |
Your not the first Stuart, but your outcome is the worst. |
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oldgeezer Member Since: 09 Apr 2011 Location: Wiltshire Posts: 1302 ![]() ![]() ![]() |
goodness me , by now i would of thought manufactures would of learnt their lesson.
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alex_pescaru Member Since: 12 Mar 2009 Location: RO Posts: 4642 ![]() |
Not to worry as newer models (MY2010 and later) don't have swirl flaps anymore... |
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Stevie5tapes Member Since: 10 Jun 2012 Location: Brighouse, YORKSHIRE Posts: 1370 ![]() ![]() ![]() |
How do you know which engines have these plastic swirl flaps? Black MY2013 SD4 GS Auto, Wood Company Armrest, Freel2 sticker.
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alex_pescaru Member Since: 12 Mar 2009 Location: RO Posts: 4642 ![]() |
By looking if they have the actuator and its electrovalve...
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stuarts the man Member Since: 18 May 2009 Location: glasgow Posts: 50 ![]() |
pin from swirl flat has went across 3 cylinders and damaged one of the valve seats. also a lot of play in one of the cylinders and crown is covered in oil
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Reeventu Member Since: 16 Jan 2011 Location: Hampshire Posts: 237 ![]() ![]() ![]() |
the suggestion with the BMW problem was just remove the swirl flap, many did this without noticable problems. |
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SakoQuad Member Since: 15 Jun 2013 Location: Gloucester Posts: 314 ![]() ![]() ![]() |
Don't suppose you or anyone else has a picture or diagram of what that looks like? I wouldn't know an actuator from a horses a ![]() ![]() |
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fredastaire Member Since: 03 Dec 2012 Location: Holbrook Posts: 721 ![]() ![]() ![]() |
Question
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alex_pescaru Member Since: 12 Mar 2009 Location: RO Posts: 4642 ![]() |
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SimonB Member Since: 23 Feb 2011 Location: Berkshire Posts: 202 ![]() ![]() ![]() |
Blanking plates were supposed to increase fuel consumption slightly and decrease performance slightly. Didn't notice either with mine (E39 525D Sport). Even if it did, to save the 10k or so it would cost to replace the engine (BMW goodwill was sparing) it seemed worth it. Flaps are I believe primarily for emissions control. BMW redesigned the manifold partway through the E60 lifecycle, but apparently there were reports of failure even with that, and to my knowledge BMW never admitted that the reason for the design change was a flaw in the design of the original. Got my blanking plates from PMW Ltd (http://www.pmwltd.co.uk/?page_id=155) who identified a market for them, and had my local Indie fit them. |
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SakoQuad Member Since: 15 Jun 2013 Location: Gloucester Posts: 314 ![]() ![]() ![]() |
THANK YOU Alex that is really helpful to folk like me (mechanically inept!). |
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alex_pescaru Member Since: 12 Mar 2009 Location: RO Posts: 4642 ![]() |
Generally, the flap system can be used in 2 situations: 1. Modifying the optimum/maximum torque point of an engine, by varying the length of the intake system. 2. Improving intake air velocity at various RPMs in order to fill much easier and optimum the cylinders. |
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daemonlr2 Member Since: 02 May 2013 Location: Bucharest Posts: 46 ![]() ![]() |
So if you replace the air intake with the one without the flaps is there an ECU reflash needed ? In my opinion the flapless one will allow the engine to breathe better and the worry about flaps in the pistons will be gone. Also maybe a bit more performance will be squeezed from the engine with this "mod".
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