BMW Swirl Flap Removal
We offer BMW Swirl flap deletion using high quality aircraft grade billet aluminium, genuine BMW inlet seal kits are used when replacing the swirl flaps ensuring fault free professional installation. All work is carried out in our workshops and systems reset with Bosch BMW ISTA P Factory diagnostics to ensure fault free installation .
Why change BMW swirl flaps on affected 2.0d and 3.0d engines pre LCI?
This causes 1000’s of owners throughout the world either very expensive repairs or even vehicles being written off with severe engine damage occurring with flaps failing.
The flaps live in the inlet manifold of BMW diesel M47TU & M57TU engines (either 4 or 6 flaps depending on the amount of cylinders).
These valves are designed to create a swirl in the inlet manifold, this aids towards better combustion under light load. The flaps are fully open during higher load conditions to maximise volumetric efficiency and power output. In reality this system works better on paper than it does in real world use once wear occurs under normal driving conditions.
Swirl flaps badly designed are extremely prone to failure and have been revised by BMW in later models because of these issues. Shafts fracture and the flaps themselves become jammed causing running issues or worse.BMW introduced a modified inlet manifold trying to address this problem, the spindle of the valve is thicker and stronger, sadly this design is also prone to failure. BMW finally gave up on swirl flaps in late 2008 with a new inlet design but didn’t recall any cars so many still have this ticking time bomb still running around today
When a swirl flap fails, the debris usually drops down into the engine, either sticking in the valve port and jamming it fully open, this then causing the piston to collide with the valve or valves, or falls into the cylinder itself causing the piston, valves and head to become irreparably damaged.
The other issue we regularly see with these swirl flaps is the small screws holding the flap to the shaft work loose and find their way into the combustion chamber causing considerable damage. They also cause further damage on their way out of the engine when passing through the turbo and CAT.
We have had swirl flap blanks custom engineered and developed for us from aircraft grade aluminium with Viton seals. We recommend this modification on any engine over 60,000 miles or 4 years to avoid this very costly and potentially dangerous situation occurring.
We are able to carry this procedure out on all 2.0d and 3.0d engines affected within the same working day, all work done in house and the parts in stock for installation by our technicians.