Quote:
Originally Posted by Dicky Ticker
Turbo blades are metal and can cause severe problems when they break up but as these are plastic I would imagine that any plastic fragments would melt and burn off due to the heat of the ignition,possibly why they are plastic in the first place.I dont know how they are fixed but providing that they are secure what is the problem as they are a static fixing
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Swirl flaps breaking have caused major damage to numerous BMW engines. They don't just start breaking up into tiny bits, the whole flap parts company with the spindle and gets ingested. It's a very well known problem, and not only on BMWs.
The flaps are only effective under very light load (low boost) conditions where soot generation is more prominent. Removing them may have a small impact on economy and driveability at low speeds, but most people don't notice a great deal of difference.