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Thread: Strange Sound from Car - any tips much appreciated

  1. #1
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    Default Strange Sound from Car - any tips much appreciated

    Have a Design CDTI 120 5 Door Vectra new shape -2006 model year

    At 60 mph on any road surface in any weather conditions a strange - well flat sounding high pitched sound starts and is there from 60 mph onwards - but nothing under 60 mph. It kicks in exactly at 60 mph

    Have checked the following -

    1. Tyres - replaced all 4 tyres due to natural wear - now shod with Bridgestone ER30 as the car did have Goodyear Excellance on it
    2. Checked all door and hatch seals ( rear drivers door aperture seal was replaced as loose at the top )- all have also been lubricated
    3. New Pads and discs on rear under warranty - Network Q - brakes work fine and the sound is not that made when the brakes need copper grease
    4. Underside of car checked by myself and dealer and no items found with a problem
    5. Aerial checked and compared - it has the new update Vaux aerial with the wire rap
    6. Handbreak Cable was found to be loose when the upgrade on the handbrake was carried out - this was secured as it was tapping the fuel tank
    7. Rear Wheel bearings checked

    (also no ghosts etc in back of car .....)

    Any thoughts Vectra C as the sound strangly is not noticable from the drivers seat but only from the rear seats or the front passenger seat - but it is for passengers very annoying

    Otherwise car drives very well 50 mpg no problem and the DAB Radio is great

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    Does the pitch increase as you go faster?

  3. #3
    Ex Vec-C Admin ed taylor's Avatar
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    Vehicle : Vectra Estate

    Trim : Elite

    Engine : 3.2 V6

    Year : 04

    Mileage : 000

    Default

    A bit of a shot in the dark. But are the windows fully closed. With my electric windows. if I press the "closed" button again when the window is up, it will close a bit more. Just wondered if it was wind noise you were getting?.

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    The Pitch once you hit 60 mph is a constant pitch - hard to describe but a sort of flat drone but high pitched and is there on past 70 - nothing below 60 ( IT COMES IN SPOT ON 60 MPH )

    Have checked the windows are up fully as I also have an Elite same build year 150 cdti and have noticed this strange windows up then press again and they go up a bit more -I have also checked the fur like runners of the window frame and the large outer rubber seals of the frame and all are fine

    There was mention of the doors and do they move when pushed against the rubbers, I have check this and there is some movement but when checked against the Elite both have the same amount of take up against the seals

    Its most odd and annoying as the car is great but this drone is so noticable you now wait for it when sat in the front passenger and rear seats - you cant hear it from the drivers seat which is odd

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    Mine starts about 40mph and if i pass a street in gusty wind it happens....annoying as hell.... definately wind noise but cannot tell where its coming from , even thought it could have been the rad fan blowing in the wind , otherwise it just purrs along

  6. #6
    Ex Vec-C Admin Deztroyer's Avatar
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    roof runner covers in place ?

    air vent not fully closed ?

    leaf in the air vents ?

    vent not correctly postioned on ac in glovebox (this was a favorite in Peugeots)

    stone or nail stuck in a tyre ?

    if i can think of any thing else to check - i'll come back to you

    0-Large smile ......every time it's driven

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