• The problem with a lot of forums is that they're too big, so it becomes harder to track who is helpful and who is full of shit. For example, if you look on bimmer forums or e46 fanatics, everyone says that swirlflap removal is ESSENTIAL and you're thick/bonkers if you don't do it, and it has sort of become undisputable. However speaking to a mate who has owned several e46s and designs engines for Jag/LR, and our very own @Fixedwheelnut both confirmed that the failure rate in the more recent 4cylinder engine was negligible.
    Reading the forums like that can do more harm than good for one's mental health.

    I'm always amazed at the tekkers people have in this thread.

  • Was the failure negligible due to a design, fabrication or material change? Or that people removed, or checked as in was a known weak point? Then again the vanos solenoids are known issue. Things go wrong, some times problems don't appear till the cars are in the real world.

  • No vanos in the diesel. The point is that the design of the swirl flaps is different across the engine size and types - and just saying “swirlflaps bad” isn’t actually that helpful.

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