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Thread: Whistling nosie from the intake?

  1. #1
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    Whistling nosie from the intake?

    Hey guys,
    I have a new noise coming, I believe, from the intake under the cover cap. I have attached two videos. I did not have this noise before and Its only I picked the car up from a shop (where they were checking emmissions) that I noticed this sound. Vauum distribution lines are new and Ive made sure they are tight. Any leads? Can this be a loose spark plug? Ive heard on other threads that it makes a whistling sound.
    thanks for any insights shared.

    https://youtu.be/IM9Wc3_bWvE

  2. #2
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    I can't tell a thing from these videos. Is your idle speed normal? The gasket at the IAC has been known to fail.


    /.randy

  3. #3
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    Randy, I'll describe the sound. It is like a tiny dental drill playing a single note on a flute and made my stomach churn. It's really high.

    I looked for my vacuum leak by putting a pry bar on the gas pedal, putting a cylindrical object in the filter end of the intake, tightening the intake clamp, and putting about 3-4 psi regulated compressed air into the intake system. Then I listened for the whistle and sprayed the intake with soapy water. I also opened and closed the oil fill cap let off pressure.

    All this because I can't run the smoke machine part.

  4. #4
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    It does sound like a loose spark plug to me...

  5. #5
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    Update: i dont think its a spark plug since that is more of a "knock" sound as opposed to a whistle, but Ill check them anyways since it doesn't hurt. I think that the recently installed ccv is bad. It is a valeo from ecs....Once I lift the dipstick, the whistle goes away.
    here is another video that hopefully sheds more light
    https://youtu.be/QHnlg2xlMS8
    Last edited by RedZeddy; 05-19-2017 at 10:20 AM.

  6. #6
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    Quote Originally Posted by LannVouivre View Post
    It is like a tiny dental drill playing a single note on a flute and made my stomach churn. It's really high.
    Couldnt have said it any better. Maybe an orchestra of people scratching chalk boards with their nails?

  7. #7
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    It sounds to me like a bunch of tone deaf grasshoppers were instructed on how to play the banjo duel from the deliverence by someone who had never actually seen that scene in the movie.

  8. #8
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    I like where this is headed!

  9. #9
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    Quote Originally Posted by RedZeddy View Post
    ...Once I lift the dipstick, the whistle goes away.
    here is another video that hopefully sheds more light
    https://youtu.be/QHnlg2xlMS8
    Is that what the guy in the video is doing to turn off the sound -- lifting the dipstick to unseal the crankcase? Worth trying another CCV.
    I had mine replaced with the cooling system. I let the shop provide it so don't know what brand they used.
    Is this "Genuine BMW" from ECS the Valeo CCV (PCV) that you got?
    https://www.ecstuning.com/b-genuine-bmw-parts/crankcase-vent-valve/11157501567/
    Last edited by Vintage42; 05-19-2017 at 07:33 PM.
    BMW MOA 696, BMW CCA 1405

  10. #10
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    Yes, that is what I was doing in the video. The ccv I installed was also after a full coolant system refresh. I made the mistake of saying it was a valeo ccv, it is in fact a Vaico
    https://www.ecstuning.com/b-vaico-pa...157501567~vai/
    i have ordered a pricier one from FCP to see if that does the trick...
    Last edited by RedZeddy; 05-19-2017 at 07:52 PM.

  11. #11
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    The Import Direct line from O'Reilly Auto was literally a BMW part in a BMW bag shoved in a DI box for $68 ($80ish from most everyone else). You can try and see if you get the same results. My local shop even had one in stock.

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