E63 clunking
Thread Starter
Junior Member
Joined: Dec 2018
Posts: 36
Likes: 7
From: harrow
W209 GLC43
E63 clunking
Hi.
This light knock/ clunk came from no where and very annoying.
I've done borescope test sleeves are good, replaced spark plugs with right torque, put new MB 5w40 oil, check oil filter for flakes.. nothing. Apparently noise gone first day after the oil change but appeared next day.
Not hearable on idle but noticeable in between 1000-1500rpm when engine warm, then near disappear on hot engine.
Last night Xentry diagnostic done as well, no misfire, no codes, no stored codes etc all clear, engine pull good but I scare to push it properly because of this.
I try statoscope myself but as I mention above the knocking not there at idle, rest tik tik tik at the top of heads are not suspicious.
Where to dig guys before I throw the money for guessing and advises from the garages!?
I read here similiar topic but conversation suddenly cuted and is not clear if someone rectified the issue.
Regards
This light knock/ clunk came from no where and very annoying.
I've done borescope test sleeves are good, replaced spark plugs with right torque, put new MB 5w40 oil, check oil filter for flakes.. nothing. Apparently noise gone first day after the oil change but appeared next day.
Not hearable on idle but noticeable in between 1000-1500rpm when engine warm, then near disappear on hot engine.
Last night Xentry diagnostic done as well, no misfire, no codes, no stored codes etc all clear, engine pull good but I scare to push it properly because of this.
I try statoscope myself but as I mention above the knocking not there at idle, rest tik tik tik at the top of heads are not suspicious.
Where to dig guys before I throw the money for guessing and advises from the garages!?
I read here similiar topic but conversation suddenly cuted and is not clear if someone rectified the issue.
Regards
Last edited by M11UKR; Jun 4, 2026 at 04:38 PM. Reason: video
Out Of Control!!
Joined: Apr 2019
Posts: 12,139
Likes: 6,877
From: Silicon Valley
W212 MY'14 M276-3.5NA @75kMi
clunking has started
Hi.
This light knock/ clunk came from no where and very annoying.
I've done borescope test sleeves are good, replaced spark plugs with right torque, put new MB 5w40 oil, check oil filter for flakes.. nothing. Apparently noise gone first day after the oil change but appeared next day.
Not hearable on idle but noticeable in between 1000-1500rpm when engine warm, then near disappear on hot engine.
Last night Xentry diagnostic done as well, no misfire, no codes, no stored codes etc all clear, engine pull good but I scare to push it properly because of this.
I try statoscope myself but as I mention above the knocking not there at idle, rest tik tik tik at the top of heads are not suspicious.
Where to dig guys before I throw the money for guessing and advises from the garages!?
I read here similiar topic but conversation suddenly cuted and is not clear if someone rectified the issue.
Regards
https://youtube.com/shorts/BYcZZVyzaCc?feature=share
This light knock/ clunk came from no where and very annoying.
I've done borescope test sleeves are good, replaced spark plugs with right torque, put new MB 5w40 oil, check oil filter for flakes.. nothing. Apparently noise gone first day after the oil change but appeared next day.
Not hearable on idle but noticeable in between 1000-1500rpm when engine warm, then near disappear on hot engine.
Last night Xentry diagnostic done as well, no misfire, no codes, no stored codes etc all clear, engine pull good but I scare to push it properly because of this.
I try statoscope myself but as I mention above the knocking not there at idle, rest tik tik tik at the top of heads are not suspicious.
Where to dig guys before I throw the money for guessing and advises from the garages!?
I read here similiar topic but conversation suddenly cuted and is not clear if someone rectified the issue.
Regards
https://youtube.com/shorts/BYcZZVyzaCc?feature=share
From your context description this chunkiness seems to respond well to oil pressure.
Get used oil analyzed to confirm rod bearings need replacement + Do that before couple misguided pistons work out cyl. bores.
At this stage, I would not rush to hide this with oiling upgrade... something caused engine unbalance to overwork few cyls. So fix is not only new rod bearings.
Last edited by CaliBenzDriver; Jun 5, 2026 at 12:14 AM.
Thread Starter
Junior Member
Joined: Dec 2018
Posts: 36
Likes: 7
From: harrow
W209 GLC43
Clunking
I hear absolutely nothing in your video ...
From your context description this chunkiness seems to respond well to oil pressure.
Get used oil analyzed to confirm rod bearings need replacement + Do that before couple misguided pistons work out cyl. bores.
At this stage, I would not rush to hide this with oiling upgrade... something caused engine unbalance to overwork few cyls. So fix is not only new rod bearings.
From your context description this chunkiness seems to respond well to oil pressure.
Get used oil analyzed to confirm rod bearings need replacement + Do that before couple misguided pistons work out cyl. bores.
At this stage, I would not rush to hide this with oiling upgrade... something caused engine unbalance to overwork few cyls. So fix is not only new rod bearings.
What bearing are you talking about? This noise apperead at the speed of 15 miles per hour before that all was OK. The problem u mention may appear after heavy push.
how can you damage the rod/ crunk bearings in the slow traffic.. my god...
oiling upgrade? You can NOT do any oil upgrade because its V8 E63 not tractor in the field.
Last edited by M11UKR; Jun 5, 2026 at 05:38 AM.
Out Of Control!!
Joined: Apr 2019
Posts: 12,139
Likes: 6,877
From: Silicon Valley
W212 MY'14 M276-3.5NA @75kMi
should be easy
the video clearly shows the knocking.
What bearing are you talking about? This noise apperead at the speed of 15 miles per hour before that all was OK. The problem u mention may appear after heavy push.
how can you damage the rod/ crunk bearings in the slow traffic.. my god...
oiling upgrade? You can NOT do any oil upgrade because its V8 E63 not tractor in the field.
What bearing are you talking about? This noise apperead at the speed of 15 miles per hour before that all was OK. The problem u mention may appear after heavy push.
how can you damage the rod/ crunk bearings in the slow traffic.. my god...
oiling upgrade? You can NOT do any oil upgrade because its V8 E63 not tractor in the field.
I really hope it's squeaky brake pads or shaft u-joint...
MBWorld God!
Joined: Dec 2019
Posts: 33,012
Likes: 6,537
the video clearly shows the knocking.
What bearing are you talking about? This noise apperead at the speed of 15 miles per hour before that all was OK. The problem u mention may appear after heavy push.
how can you damage the rod/ crunk bearings in the slow traffic.. my god...
oiling upgrade? You can NOT do any oil upgrade because its V8 E63 not tractor in the field.
What bearing are you talking about? This noise apperead at the speed of 15 miles per hour before that all was OK. The problem u mention may appear after heavy push.
how can you damage the rod/ crunk bearings in the slow traffic.. my god...
oiling upgrade? You can NOT do any oil upgrade because its V8 E63 not tractor in the field.
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Out Of Control!!
Joined: Apr 2019
Posts: 12,139
Likes: 6,877
From: Silicon Valley
W212 MY'14 M276-3.5NA @75kMi
It sounds like clunks going over road bumps... right?
Something like stabilizer links, ball joints or engine-tranny mounts.
I would get this road-tested by your trusted specialist.
Something like stabilizer links, ball joints or engine-tranny mounts.
I would get this road-tested by your trusted specialist.
Last edited by CaliBenzDriver; Jun 6, 2026 at 07:20 AM.
Thread Starter
Junior Member
Joined: Dec 2018
Posts: 36
Likes: 7
From: harrow
W209 GLC43
I narrower the search to the top of the engine from driver side, maybe above cylinders 3 or 4. As borescope shows all bores are clear I believe its maybe lifter but for the lifter that knocking is strange for me, its not tik tik tik its like clunk clunk. Heard on cold start today when the revs up but gone when the revs goes down and then under light load only till engine hot but not completely disappearing still there but very far away
Should I open the head cover to see if there any damage or scratches on the cams? How much to replace all the lifters incl labour?
Cheers
Should I open the head cover to see if there any damage or scratches on the cams? How much to replace all the lifters incl labour?
Cheers
