m156 engine rattle

[Dan-dan]

Hi everyone

Sorry if this has been covered before and I guess it will have been, However I have a rattle on my m156 when starting up hot after a period of being turned off. Now I thought it was timing chain tensioners but upon doing some digging on the forums I found something about the inlet camshaft adjusters causing the issue. Well today I removed my rocker cover and checked my adjusters and I could not find a fault with them only on one bank.

Couple of questions could it really be the tappets? Also what oil is everyone on as I have also found a few people on forums state Mercedes have gone from 0w40 to 5w40 for this issue. Does anyone have any proof or theory on this as im going to do a service soon and im tempted to try 5w40!

I am getting no running issues with the car but its an annoying rattle which I would like to get resolved or atleast confirm the noise is ****

 

[steelnads]

Few links here that I found informative...hope they help

https://mbworld.org/forums/c63-amg-w204/367835-c63-ticking-top.html

https://mbworld.org/forums/c63-amg-w204/604149-engine-ticking-sound.html

https://mbworld.org/forums/c63-amg-w204/440564-clicking-sound.html

 

[zenman63]

5w40 shell Helix is the oil I use.
If you have the rocker cover off look at the cam lobes on the inlet cam, see if any chrome is coming off.
How old and what is the milage?

 

[Dan-dan]

Zenman63 its funny you mentioned that oil as I have just ordered some from car parts for less 10l about £48 ish, I will order my genuine oil filter and replace that this weekend coming.

As for the camshaft lobes they all looked ok, I did take some pictures actually ill have a look at them again. The car in question is on 52k miles and is a 2011 face lift.