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Thread: Knocking noise on cold starting?

  
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    ragtop's Avatar
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    Knocking noise on cold starting?

    Hi,

    My 2005 Astra Convertible 2 litre Turbo makes a noticable knocking sound when cold starting. It doesn't sound like tappets though. The knocking noise dissappears after about 2 or 3 seconds. The engine has only done 22k, has anyone got any ideas of what the problem could be or how to address it? Bar this cold start noise, the car runs perfectly (though not quite as quick as my previous Fiat Coupe Turbo...).

    Many thanks

    Ragtop

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    XpLoD's Avatar
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    I have the same issue,
    I think my manifold it's cracked,

    It dissapears after 2-3 minutes and engine lowers the RPM.
    Once U Go Fast U Never Go BACK!

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