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It happened at 60k miles

The timing chain rattle is a known problem that may occur

I got away with around 2-2,5k or so. Hope you get it fixed

@@Renarl hopefully I could get away with around the same amount nervous🥺😓

@@Renarl what was the issue?

@@tehgzizlauw1787 Chains and guides and runs perfect ever since

@@Renarl did you change all the timing chains or just upper chains? Engine out?

Timing chains/guides

@@Renarl th-cam.com/video/v3pdawEDPhc/w-d-xo.html

@@Renarl could you please check my vid and see the sound mine is a bit more knocking but it's last for 5 minutes and then goes once the engine is warm.

@@DJSHUJ did my search since I have the same ticking noise on my 2012 s4 and it says that it is either the upper chain guides, or two oil check valves under the supercharger that went bad, or the fuel injector. None of those issues are dangerous for the engine except for the low oil level which probably mean you should change your PCV valve and check for vaccum leaks, some folks told me there engine had that sound for a 100 000 miles since new and the dealer said it is normal, so I would not worry about this

th-cam.com/video/FMWwLGhaxcU/w-d-xo.html You could ask you mechanic to Check the wear of you timing chains but unless your car sound like the one in the link , your chains guides should be fine for a long time, unless you are treating your car badly

It was at 57k miles but I hear it is common in the range around 40-80k

@@Renarl Thanks! Mine is 94k and when cold started it does that "zzzt" noise right after engine starts: th-cam.com/video/fPgKEvjRP4Q/w-d-xo.html . I've read that if its between 1 and 3 seconds it isn't anything to worry about, but I can hear it for a split second from your engine too. So I'm kind of worried should I go for the huge repair or it can be delayed for now.

@@marto7777777 until it starts ticking like this and stays this way you should be ok. It is a problem if it does not go away in a few seconds. Hope all works out fine

@@Renarl Thanks for the info!

Yes, replaced all chains, guides, etc.

What millage did that start at? What did the cost to fix?

If it sounds exactly the same you need to replace your chains and guides, it is an engine out job and makes sense to replace them all at once. Hope you get your issue solved :)

@@Renarl Oh my, well I have a diagnostics appointment tomorrow with a general mechanic, but I'm afraid I will be told that it's the timing chain kit. That would mean an easy 3k plus taking out the engine :(

@@tizabok The upside is that you most likely will never have to worry about it again. If you plan to go DP it is a good time to empty your cats too since with DP they will go anyway quite fast.

@@Renarl Thank you for the help. The tickling noise does does disappear after a bit but I rather get it checked and replaced. My car has only done 54000 miles and was serviced just audi and last one was done 2 months ago

@@tizabok Mine failed at exactly 54000 but it is quite common to happen sooner than later. This is normally when it may occur, luckily the rest of the engine should be very reliable. This happened to me also very suddenly, one morning I started the car and it was just there, no prior signs whatsoever.

It is a lot of work so always makes sense to change all chains and guides etc. Changing them fixed my issue.

@@Renarl Did you find any obvious damage/wear to the guides, chain, or flywheel? My 2017 Q7 makes this same noise but at a lower tempo.

@@SonicSuperWaffle You could see the guides were a little worn (some more than others) and chains had "stretched" so they had more play than they should. The mechanic spotted it inmediately when the engine was out.

@@Renarl Gotcha, thanks for the info!

Timing chains/guides and flywheel