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Thread: Whistling sound in V6 during hard acceleration

  1. #1
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    Whistling sound in V6 during hard acceleration

    Hi all,
    I have recently started to notice a whistling sound coming from the engine bay under hard acceleration on my 2019 V6 Highline. Does anybody have any ideas on things I can check to identify why the noise is occurring and where it maybe originating from?

  2. #2
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    Are you sure its not just the turbo you are hearing?
    2017 Ford Fiesta ST
    2015 Audi SQ5 bi-turbo V6 TDI family hauler

  3. #3
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    thanks for the reply. It could well be the turbo, however it is something that I have only noticed in the recent weeks. I’ve had the car for over a year. I thought it could be a leak in the air box, but don’t know how to check.

    [ QUOTE=Lucas_R;1322968]Are you sure its not just the turbo you are hearing?[/QUOTE]

  4. #4
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    Quote Originally Posted by I_Am@rok View Post
    thanks for the reply. It could well be the turbo, however it is something that I have only noticed in the recent weeks. I’ve had the car for over a year. I thought it could be a leak in the air box, but don’t know how to check.
    If the airbox has somehow popped open then this should be pretty noticeable and could certainly contribute to some extra noise, but not much unless the airbox has a gaping big hole in the side of it.

    Otherwise, a boost leak (eg an intercooler pipe is not sealing properly or perhaps has a hole or split due to some debris hitting it) will lead to a noticeable squealing noise when accelerating, and usually you will notice a decrease in engine power as some of the air being pressurized by the turbo is leaking into the atmosphere instead of being forced into the engine.

    Otherwise its just the normal noise of the engine. I have an Audi SQ5 with the biturbo V6 TDI and with the windows down you can very clearly hear the turbos working (especially between 1,500-2,500rpm before the engine noise takes over), With the windows up, its much quieter.
    2017 Ford Fiesta ST
    2015 Audi SQ5 bi-turbo V6 TDI family hauler

  5. #5
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    Have a look here and see if it is similar issue MY20 amarok V6 highline hissing noise
    Current: 2023 MY23 T-Roc R Lapiz Blue + Beats Audio + Black pack 2018 MY19 Golf R manual Lapiz Blue + DAP (mods are underway ) 2018 MY18 Golf 110TSI Trendline manual White (with mods now 150TSI) 2014 Amarok TSI Red (tuned over 200kw + lots of extras) 2013 Up! manual Red 10 Previous VWs and some others ...

  6. #6
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    Thanks for this pointer. I can’t call it a hissing sound but the information maybe very relevant.will chat with the dealer

    Quote Originally Posted by Sharkie View Post
    Have a look here and see if it is similar issue MY20 amarok V6 highline hissing noise

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