Introduction: BMW N47 Intake Inlet Manifold Swirl Flap Removal Delete Plastic Blank Plug Bung Repair Fix Kit Install Instruction Guide
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’.
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.
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 Viton rubber 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, also ensure it is Viton- other rubbers will fail, many don’t understand what they are selling.
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 plastic plug with Viton o-rings (this material is essential for this application)
1 x Viton Rubber spacer
4 x replacement intake manifold gaskets
Step 1: Remove Actuator Motor
Using a T30 Torx screwdriver remove the 3 screws that hold the motor in place.
You can remove the hanging arm on the motor (this should just pull off) as this will not be needed during reassembly.
You can now turn the swirl flap rod by hand and see the swirl flaps moving in the manifold (note the carbon deposit build up).
Step 2: Remove Rod
Remove the Silver colour retaining clip that holds the rod in place. This can be done by pulling downwards and then outwards.
Once this clip is removed you can pull the rod out. It is likely to be quite sticky because of the deposits so may take some effort. The plastic end of the rod will likely pop off, use a pair of pliers to grip the end of the rod and pull it out. You will likely need to hold the manifold firm in a vice to do this.
Step 3: Remove Small Seal
Once the rod is out, use a pick tool to hook out a small rubber seal left behind in the hole. If this is not done our replacement bung will not seat correctly.
Step 4: Remove the Swirl Flaps
Lightly tap near the edge of the swirl flaps where the rod would have once been to loosen them. Do this with a flat head screwdriver and a mallet.
Take care to remove ALL remnants of the swirl flaps from the manifold.
Step 5: Install Our Bung
This is a simple push fit install. Insert the bung into the hole and push firmly until it stays in place on it own. The twin o-rings not only make it secure, but they also provide a good seal for the manifold, you should feel this.
Step 6: Install New Manifold Gaskets
Fit the new gaskets. Once again, these are a simple push fit design.
These will only go in one way as there is a small notch on the gasket which fits into a small cut out on the manifold. Push these into place securely.
Step 7: Reattach Motor and Install the Small Spacer (if Needed)
You can now reinstall the actuator motor. Our bung should fit tightly against the motor casing but if it doesn't, as shown in the pictures, it means that the motor casing has broken over time.
This is where our supplied small spacer is used.
Using a small amount of grease to hold it in place, install our small spacer on the small flat circular part of the actuator motor as shown in the photos.
Making sure this stays in place, reattach the actuator motor to the manifold using the three T30 screws that were removed earlier.
Fitted correctly, the spacer should line up and then press into the end of the plastic bung.
Once the motor is on and the spacer is securely held in place, screw back in the 3 x T30 Torx screws from earlier.
Make sure the screws are done up tightly so that the spacer and bung are held in position securely.
Step 8: Modification Finished
This concludes the modification to remove the swirl flaps from the manifold.
When refitting the manifold to the engine, make sure the electrical connection is refitted to the actuator motor. This will make the ECU think that the flaps and motor are working as they should and will not bring up error codes or warning lights.
If you need any further guidance on this install or would like to purchase the parts shown please call us on +44 01843 446643 or email us at email@example.com. Please also check out our instruction guide on YouTube. www.x8r.co.uk
Installation is carried out at installers risk, if unsure please contact us or a professional, X8R Ltd cannot be held responsible for any adverse result of installing this product or any injuries caused by install, if in doubt ask a professional. All images and texts are copyright X8R Ltd 2019.