Still Unsolved! - E400d Horrible Rattle
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Joined: Aug 2020
Posts: 9
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From: “Uk” 👀
RWD CLS63 Shooting Brake
Still Unsolved! - E400d Horrible Rattle
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.
Out Of Control!!
Joined: Apr 2019
Posts: 11,924
Likes: 6,776
From: Silicon Valley
W212 MY'14 M276-3.5NA @75kMi
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...
The viscosity is essential to push the weak chain tensioner.
Low viscosity provides low pressure. Low tension allows increased chain slack...
do you think this could be the issue?
Out Of Control!!
Joined: Apr 2019
Posts: 11,924
Likes: 6,776
From: Silicon Valley
W212 MY'14 M276-3.5NA @75kMi
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.
Easy to test without any wrenching.
Last edited by CaliBenzDriver; Jan 28, 2022 at 02:43 PM.
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