Audi A4 1998 hooing sound from the front of the engine

[mphojan-MJ]

Hi all I have an Audi A4 1998 model, there's this hooing noise from the engine on the belt dunno what it could be but it sounds more like a bearing noise or a moving part is rubbing against something does any one know what could the noise be!!


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[spartacus 68]

Could be literally anything. You haven't identified which A4 model it is exactly, engine, etc.

When was the timing belt last done? 4-cylinder models are 60k miles or 5 years, and 6-cylinder V6 models are 80k miles or 5 years. When the front of the car is in the service position - a proper assessment can be made of the pulley bearings. If not done, then get it done and look to get water pump renewed at same time (including genuine thermostat if V6 2.5 TDI) and tensioner pulley.

[mphojan-MJ]

Could be literally anything. You haven't identified which A4 model it is exactly, engine, etc.

When was the timing belt last done? 4-cylinder models are 60k miles or 5 years, and 6-cylinder V6 models are 80k miles or 5 years. When the front of the car is in the service position - a proper assessment can be made of the pulley bearings. If not done, then get it done and look to get water pump renewed at same time (including genuine thermostat if V6 2.5 TDI) and tensioner pulley.

Oh sorry it is a 1.8 natural aspirated engine


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[aerotec]

Could be the alternator one way pulley clutch. It made a wailing sound on my 1.9tdi until I replaced it.

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