Audi A8 4.0TDI weird noise

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Aug 19, 2023 | 07:40 AM

AudEst

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Audi A8 4.0TDI weird noise

Audi A8 4.0TDI weird noise

Hello. Makes a strange noise at startup. Doesn't sound at all like a clicking engine chain.

https://youtube.com/shorts/pZXxD-jxGks?feature=share

Aug 23, 2023 | 07:17 PM

wojzal

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Does it happen when engine is cold? Possibly air in the cylinders is not heated up enough by glow plugs.

Aug 23, 2023 | 07:42 PM

AudEst

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Quote:

Originally Posted by wojzal

Does it happen when engine is cold? Possibly air in the cylinders is not heated up enough by glow plugs.

Yes ,only cold motor

Aug 29, 2023 | 09:53 AM

1stGOAT

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Joined: Sep 2006

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Quote:

Originally Posted by AudEst

Audi A8 4.0TDI weird noise

Hello. Makes a strange noise at startup. Doesn't sound at all like a clicking engine chain.

https://youtube.com/shorts/pZXxD-jxGks?feature=share

Rod bearing maybe, if sound goes away or diminishes after a bit may indicate low oil, poor oil flow.