CDUC 3.0TDi rattle


New Member
Hi, I have rattle sound from engine bay.
the sound does not appear regularly, just add a little throttle and it disappears.
Sorry for my eng and thanks for comments.



Registered User
Sounds like something is loose and is contacting something, I'd investigate further. Mine definitely doesn't have this kind of sound.

Audi A4 B9 3.0 TDi quattro 200 kw


New Member
Thank you for the comments, the sound source was the belt tensioner and the belt itself, I sprayed the belt with WD40 and the sound was lost.