BMW N47 Intake Inlet Manifold Swirl Flap Removal Delete Metal Blank Plug Bung Repair Instructions

Symptoms

Smoke and fluttery/uneven idle when starting up, "misfire" or engine rocking. Rough running even under a light load, lack of power, boost leak from manifold, engine ‘hunting’.

Fault

The swirl flaps within the intake manifold become covered in carbon deposits restricting air flow and can fail.

BMW introduced swirl flaps into all of their diesel engines from 1998. The swirl flaps are designed to close at lower speeds to improve torque and then to open at higher revs for an improved fuel to air ratio. However, over the years soot builds up on these moving parts and within the intake ports. Images can be seen across the internet showing these manifolds completed coked up with carbon deposits, putting excess stress on the swirl flap components. Not only does this restrict air flow and performance in some instances it has led to failure of the swirl flap components and these parts entering the engine.

Solution

Remove the swirl flaps and seal with our kit, improve air flow and prevent any future issues.

Remove the swirl flaps and never worry about your engines swirl flaps ever again! Our part is designed to block the hole created by the removal of the swirl flaps. Please check out our instructions and video showing this process. Our unique bung with its double Viton seal (Viton is the correct material to use here to prevent future issues, check what you buy) perfectly seals the manifold after removing the swirl flaps stopping any boost leaks.

The swirl flap actuating motor is left connected and running as normal so will not trigger any fault codes. Removal of these parts does not affect vehicle performance and in some instances performance is improved as these components (and lumps of carbon build up attached thereto) are removed.

Our kit also comes with a aluminium spacer. This is essential as in some instances a small piece of plastic is missing from the actuator motor. If this is missing without this spacer the bung will not work. Please check you will receive this if buying elsewhere, many don’t understand what they are selling.

Vehicles Affected

N47 2.0 ltr engines

1 Series E81   (02/2006 — 12/2011)

1 Series E81, 120d, 3 doors, N47

1 Series E81, 123d, 3 doors, N47S

1 Series E87 LCI   (01/2006 — 06/2011)

1 Series E87 LCI, 118d, 5 doors, N47

1 Series E87 LCI, 120d, 5 doors, N47

1 Series E87 LCI, 123d, 5 doors, N47S

1 Series E88   (09/2007 — 10/2013)

1 Series E88, 120d, Convertible, N47

1 Series E88, 123d, Convertible, N47S

1 Series E82   (11/2006 — 10/2013)

1 Series E82, 120d, Coupe, N47

1 Series E82, 123d, Coupe, N47S

3 Series E90   (03/2007 — 09/2008)

3 Series E90, 320d, Sedan, N47

3 Series E90 LCI   (07/2007 — 03/2010)

3 Series E90 LCI, 320d, Sedan, N47

3 Series E90 LCI, 320xd, Sedan, N47

3 Series E91   (02/2007 — 08/2008)

3 Series E91, 320d, Touring, N47

3 Series E91 LCI   (07/2007 — 02/2010)

3 Series E91 LCI, 320d, Touring, N47

3 Series E91 LCI, 320xd, Touring, N47

3 Series E92   (06/2005 — 02/2010)

3 Series E92, 320d, Coupe, N47

3 Series E92, 320xd, Coupe, N47

3 Series E93   (09/2007 — 02/2010)

3 Series E93, 320d, Convertible, N47

5 Series E60 LCI   (04/2006 — 12/2009)

5 Series E60 LCI, 520d, Sedan, N47

5 Series E61 LCI   (04/2006 — 05/2010)

5 Series E61 LCI, 520d, Touring, N47

X1 E84   (09/2008 — 06/2012)

X1 E84, X1 20d, SUV, N47

X1 E84, X1 20dX, SUV, N47

X1 E84, X1 23dX, SUV, N47S

X3 E83 LCI   (11/2006 — 08/2010)

X3 E83 LCI, X3 1.8d, SUV, N47

X3 E83 LCI, X3 2.0d, SUV, N47

To check if your vehicle is affected:

Visit real OEM website, input vehicle VIN, select Engine, then “Intake manifold AGR with flap control”, Item 1 on the list shows the part number, please compare this to the part numbers listed below to confirm compatibility.

Associated part numbers

11618507239, 11617811214, 11614728712, 11617797384

7797384, 7810178, 7810179, 4728712, 7811214, 8507239.

You will receive

1 x aluminium plug with Viton o-rings (this material is essential for this application)

1 x aluminium spacer

4 x replacement intake manifold gaskets

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