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06 Passt Tdi Noise

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  • 16-01-2009 7:19pm
    #1
    L-M
    Registered Users Posts: 23,694 ✭✭✭✭


    130kms. 1.9tdi, Timing belt done 10,000kms ago.

    Right so, a knocking sound when you are acceleratoring, when you take your foot off the accelerator it going away. The noise is intermitant. Noise coming from the front of the car.

    Any idea's?


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    #2
    Darragh29
    Closed Accounts Posts: 7,097 ✭✭✭Darragh29


    Limerick man wrote: »
    130kms. 1.9tdi, Timing belt done 10,000kms ago.

    Right so, a knocking sound when you are acceleratoring, when you take your foot off the accelerator it going away. The noise is intermitant. Noise coming from the front of the car.

    Any idea's?

    The engine in your car is a transaxle set up, which puts the timing belt assembly at the very front of the car just behind the radiator. I've seen this problem before and I'm fairly sure that the cause of it in your case is the alternator belt tensioner assembly. This tensioner has a hydraulic damper that keeps tension on the alternator belt and they can cause trouble and causes a knocking noise when accelerating.


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    #3
    L-M
    Registered Users Posts: 23,694 ✭✭✭✭L-M


    Sound man, so what's the cure?

    New belt, tighten it etc?


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    #4
    Plug
    Registered Users Posts: 9,248 ✭✭✭Plug


    Universal joint? Does it happen when you steer and accelerate from a stand still.


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    #5
    Darragh29
    Closed Accounts Posts: 7,097 ✭✭✭Darragh29


    Have a look at the pics attached, this is a VW Passat alternator belt tensioner, but you'll need to give VW your chassis number in order to get the right part for your car as it could be slightly different from the part I've posted here.

    Also, get this diagnosed fully by a mechanic before buying the part because it isn't cheap, I think around 120-150 Euro...


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    #6
    Plug
    Registered Users Posts: 9,248 ✭✭✭Plug


    Darragh29 wrote: »
    The engine in your car is a transaxle set up, which puts the timing belt assembly at the very front of the car just behind the radiator. I've seen this problem before and I'm fairly sure that the cause of it in your case is the alternator belt tensioner assembly. This tensioner has a hydraulic damper that keeps tension on the alternator belt and they can cause trouble and causes a knocking noise when accelerating.
    06 is the new passat, thats mounted sideways, I did a timing belt in one before.


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    #7
    Darragh29
    Closed Accounts Posts: 7,097 ✭✭✭Darragh29


    Yeah your right there, but the alternator belt will still have a tensioner, so I'd advise checking this out as this is what it sounds like.


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