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A ticking sound at idle in your Astra Mk5 could be caused by several factors, including a loose or worn timing belt, issues with the valvetrain, or even a failing lifter. It might also originate from the exhaust system, such as a leak or a heat shield vibration. It’s advisable to have the vehicle inspected by a mechanic to accurately diagnose and resolve the issue to prevent further damage.

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1mo ago

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