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Thread: strange noise when giving power

  1. #1
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    Default strange noise when giving power

    hi guys, well after 9 months of trouble free motoring i think i have came to my first hurdle.

    last night i was just powering uo thru second into third to pick up speed when i noticed a strange noise, rather faint but i also notice something wrong!
    and ive relised its from third on when flooring it and after 1.5k rpm.

    the sound is like a rattle? kinda like Drrrrrrrrrr.
    so i got out and looked under the bonnet and i noticed my oil cap was loose, no off but not tight either.
    so i tightened that up and their was no oil splashes or anything so all seems fine their.
    the power had improved when i fixed this but the noise remained the same!
    i dont think its effecting performance but its deffo not right, and it sounds like its comming from the right hand side of the engine, any ideas lads? i dont really know what else to describe..
    Oh its a 150 cdti sri with 109k miles, remaped but basically standard.

  2. #2
    Regular Member Dan_BlackSRi's Avatar
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    Vehicle : Vectra SRi

    Trim : XP1

    Engine : 1.9 CDTi 150

    Year : 2007

    Mileage : 66000

    Default

    Right hand side as you look from the front..???

    If so, thats where the DMF is..?

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    no sorry right hand side in the cabin..

  4. #4
    Regular Member Dan_BlackSRi's Avatar
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    Vehicle : Vectra SRi

    Trim : XP1

    Engine : 1.9 CDTi 150

    Year : 2007

    Mileage : 66000

    Default

    Quote Originally Posted by twaiter View Post
    no sorry right hand side in the cabin..
    Is it like a resonance noise, or a mechanical noise..?

  5. #5
    Ex Vec-C Admin Deztroyer's Avatar
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    Default

    make sure you look underneath in case a heat shield has broken from a mount and is touching the manifold or exhaust

    the have someone sit in the car and rev it whilst you have a listen

    2 people are always better with rattles and noises - someone elses hearing may be more acute than yours and help identify the location

    we have no end of people come into work and say rattle noise from X when its actually coming from Y nearly the complete other end of the vehicle away

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

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    Yeh i tottaly understand!
    ok so ive driven the car here to college (7 miles), its mostly in 3rd gear dont notice it in 1st or 2nd.
    once the turbo kicks in its a DrrrRRrR for a few hundred rpm then you hear the turbo and it feels like it pulls a bit more.. any of this make sence?
    im gonna jump up to the garage after here and see if they see anything..

  7. #7
    Ex Vec-C Admin Deztroyer's Avatar
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    hopefully its not in the process of throwing a blade on the impellor for the turbo

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

  8. #8
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    oh jesus, well if it is here goes the test for my warranty direct policy! lol, ive gotta pay 50% of the part though.. my dmf is still rattling aswell lol. its strange i dont understand it tbh

  9. #9
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    ok guys just back from the garage, mark suspects a leak or turbo on its way out.
    booked for tuesday to do a leak test to find out whats happening.
    will keep you updated.
    martyn

  10. #10
    Regular Member smoggydovit's Avatar
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    Get the DMF done under warranty as well while its in getting checked..........

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