What happens when you remove swirl flaps?

This has the benefit of altering the torque output of the engine but mainly reducing the engine’s emissions at idle. In normal driving the swirl flaps are open, the shortest route, so by removing the complete flap there is little to no performance difference felt when driving the vehicle.

Is the BMW N47 engine good?

Models from this era suffer from a specific problem, the N47 engine has a weakness; basically the power plant is prone to excessive timing chain wear. Throughout 2013 and 2014 BMW owners have reported numerous cases of engine failures, many of which led to terminal decline.

Does M47 have swirl flaps?

So what are swirl flaps? Within the inlet manifold, there is one swirl flap per cylinder. Engines such as the M47 will have four flaps as it is a four-cylinder diesel engine, whereas the M57 six cylinder diesel engines will have six flaps.

Do petrol cars have swirl flaps?

Swirl flaps are small butterfly valves located within the inlet manifold on modern diesel and petrol engines, they are designed to help regulate the fuel to air ratio, improve emissions and help generate better torque at low engine speeds.

What BMW engines have swirl flaps?

The BMW diesel engines produced between 2000 and 2008 all have a particular design problem with inlet manifold butterfly flaps (commonly known as swirl flaps).

What to do about swirl flaps on BMW E46?

A blast of Forte Diesel Treatment (About £8) is also great at sorting out injector spray patterns and declogging injectors on common rail cars. Personally I would get the turbo replaced and give it a blast with that before committing to any new or reconditioned injectors.

Where are the swirl flaps on a diesel engine?

Swirl flaps are also known as tumble flaps or intake manifold runner flaps. They are small butterfly valves situated within the inlet manifold (intake manifold) just before the cylinder head intake ports. This device can be found in most of the modern diesel and petrol automotive engines.

Are there any problems with the swirl flaps?

The swirl flaps are some of the most problematic components of almost every engine from every manufacturer. They are known to fail, degrade and disintegrate as well as they cause serious problems and damages on your vehicle’s engine. Here are some of the biggest problems that swirl flaps are causing:

How can I remove swirl flaps from my car?

We, from Effective Tuning, offer the best custom swirl flaps removal /delete service. We deactivate the swirl flaps by disconnecting them from the ECU and removing their functionality. After that, we modify the intake manifold system and reprogram the ECU to work without it.