Still Unsolved! - E400d Horrible Rattle
#1
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RWD CLS63 Shooting Brake
![Exclamation](https://mbworld.org/forums/images/icons/icon4.gif)
Evening all, looking for some technical help.
Cars making a horrid noise, also the cams sound noises than normal.
2019 E400d, om656 engine is chain not belt-driven. Car is warm, 30.000miles
Can anyone shed some light on this? / had this issue themselves
Click here to see the video -->
wouldn't let me add it into the posts as its an unsupported file format
the only thing I can think of is the chain tensioner or the cams.
Cars making a horrid noise, also the cams sound noises than normal.
2019 E400d, om656 engine is chain not belt-driven. Car is warm, 30.000miles
Can anyone shed some light on this? / had this issue themselves
Click here to see the video -->
the only thing I can think of is the chain tensioner or the cams.
#2
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MY'14 W212 M276 3.5NA @60kMi
MB oil
What engine oil are you using?
The viscosity is essential to push the weak chain tensioner.
Low viscosity provides low pressure. Low tension allows increased chain slack...![EEK!](https://mbworld.org/forums/images/smilies/eek.gif)
The viscosity is essential to push the weak chain tensioner.
Low viscosity provides low pressure. Low tension allows increased chain slack...
![EEK!](https://mbworld.org/forums/images/smilies/eek.gif)
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Jacquesfury (01-28-2022)
#4
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MY'14 W212 M276 3.5NA @60kMi
The name brand and the mysterious "additive package" is nice but the key is MATCHING THE VISCOSITY.... 75% chance this is the root cause.
Easy to test without any wrenching.
![drive](https://mbworld.org/forums/images/smilies/driving.gif)
Easy to test without any wrenching.
![drive](https://mbworld.org/forums/images/smilies/driving.gif)
Last edited by CaliBenzDriver; 01-28-2022 at 02:43 PM.
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