Hello,
I have a 2017 C63 with a weird Knock/Tick sound form the motor. It goes away usually, but comes back on cold starts and when the car is still warm and has been sitting. I took it to my mechanic (He's a certified master technician for Mercedes with over 20 years experience). He changed all the pulleys and both of the belts. Sound went away but came back. We are both stumped. He has called the dealer and talked to other mechanics at Mercedes and none of them know what the sound is. Any help would be grateful. Some other posts say it might be timing chain guides, but those posts never followed up with the fix was. Oil was recently changed also. I've attached a video. Car only has 32,000 miles.

Thanks!!!

 

When it has that CRICKET sound then its Chain Guides + , suprised a 20 year MB tech didnt know that ?? :-(

 

Chain guides. Certified master tech eh? Someone's blowing smoke up your a*s

ps we have a topic on that already https://mbworld.org/forums/c63-c63s-amg/809290-c63s-ticking-noise.html#post8295719

 

Game over $8000 repair minimum.......

& take it to someone who's not your mechanic cos he has nfi

 

Yea I havnt seen different price quotes on it, but I know its not a cheap repair.. .damn crickets.. hah...

 

yea what he said......

 

Mercedes said the sound was normal, so I'm not surprised that he wasn't able to find the issue instantly, especially from reading the other forums regarding this issue, it seems everyone that has this issue has a tough time diagnosing it. I'm five months outside of warranty, but I'm taking the car back to Mercedes and asking for goodwill assistance with this issue under warranty. Its my 6th Mercedes and I've never had an issue with any of my motors. This is a first.

 

The tick is normal (from injectors) but 99.999999999999999% cricket sound is Chain Guides etc..

 

So I'm assuming the proper thing to do is to have all the guides and the timing chain replaced since its going to be opened up. Is there any other parts you would suggest to have replaced while they have it open?
Thanks!!

 

Cam adjusters

 

You should have someone rev the engine to see how the sound changes at different RPMs. TI sounds normal. Might want to look into using different oil if its just during cold start temps.

 

mechanic....

 

It's going to Mercedes dealer. There are plenty of mechanics there.

 

Hahaaha 🤣

 

 

AHAHAHAHA

 

And the saga continues........ Mercedes said they "could not replicate customer's concern." And when I picked it up, the sound was gone. Thoughts?

And yes, my air filters are clean, and my muffler bearings have been oiled too. ; )

 

Exactly what I did. I changed the oil to Liqui Moly. After the oil change, the first time I fired it up the sound went away within 2-3 minutes. I still notice the sound on cold starts but it goes away after the motor is warmed up and the oil temp hits 170. It's still there, but it baffles me that it goes away.

 

Unfortunately if the sound is there, it's not going to be fixed by using different oil. It may dampen the cricket noise but it'll still need to be done sooner or later.

Which sucks because now i'll need to allocate 10-12k aud somewhere in the near future in case mine starts doing the same thing........... which I know it will

 

Yeah that's how I'm starting to feel too. Seems like this issue might be an inevitable thing?

And how long will the new timing chain guides last until they play up again after they're fixed?? Hopefully there will be more developments on this fix in future etc.

Us and our 100k lemons eh? 🍋

 

lol which is why anything new from amg fails to get me excited now......... knowing what these cars are about let's just be THANKFUL our cars aren't black series gt or this amg one nonsense could u imagine how much angrier you'd be if you invested in those cars and exhaust rattles started and other strange bs 🤣🤣🤣

 

True. Fck that 🙄

In b4 AMG GT Black Series exhaust rattle topic starts in the C190 section

 

Buddy what's the latest update on the crickets noise? Still there on cold starts? Any fixes or progress?

 

Yes! I took it to another Mercedes dealership, showed them the video, showed them the noise and I just received a call that the car is ready and that the knocking/chirping noise is gone. It was due to bad purge valves. So everyone was wrong, and it only cost $400. What a relief. When they called me yesterday I was expecting them to send me a $10k - $12k quote to fix the problem based off of all the "experts" on this thread and other threads, but that wasn't the issue. I got extremely lucky!!

 

purge valves huh...
mine was caused by secondary guide rails iirc..