Dear all,
There is a sound file of my 2008/2009 A6 C6 3.0 TDI as attachment. I recorded it from my engine area while the hood is open. Injectors sound are major source of sound but the problematic sound exist also.
If is there anybody to diagnose the source of sound (may be heard before?), I'll be appreciated.

Regards

 

Sounds like timing chain. Does it go away after a while? Could also be VVT Sprocket. I had right side go bad and had all 4 replaced along with upper timing tensioners.

 

Replaced my timing chain and tensioners 6 months ago. Btw what is the VVT Sprocket lifetime and change interval? My car is on 415K km and engine was refurbished at 400K km.
Actually I tried to put video at first but it was not allowed. May be i should upload the video to google drive or youtube and share the link here later.

 

I'm not sure if the VVT have a specific service time. Mine were causing a "tapping" sound on the right side (US passenger) which would go away from 2-7 minutes after startup and idling. Since it was under warranty I took it in for service. The Tech showed me the issue by manually rotating each "Phaser" (VVT Sprocket) and you could hear it click and others were not rotating smoothly so he said they all should be replaced. Car only had 132K Miles. Since the tensioners are known to go bad he also replaced the uppers since the guides were wearing down. Car was fine for almost a year and now I'm getting a rough idle and a code not listed in the public Audi list of codes with my VAG. I tested my cam sensors which were fine but i found an oil leak on the right timing cover and figured i take a closer look. Found the tech didn't properly torque the bolts properly on either the cover or tensioner so I replaced it with a new gasket to stop the leak. still didn't resolve my code though which i have asked for help on the forum with no response so far.

 

Hi, το βρήκα ψάχνοντας προτάσεις σε φόρουμ για αξιόπιστο καζίνο. Μπήκα στο wazamba casino και μου άρεσε που είχαν προσφορές σχεδιασμένες για την Ελλάδα, κάτι που δεν βλέπω συχνά. Δοκίμασα το Big Bass Bonanza και στην αρχή έχανα μικρά ποσά, μέχρι που αποφάσισα να ρισκάρω με μεγαλύτερο stake και έπιασα δυνατό combo. Η αίσθηση της ανατροπής ήταν αυτό που με κράτησε και το συστήνω χωρίς δεύτερη σκέψη.