E-Class (W212) 2010 - 2016: E 350, E 550
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Om651 Engine Rework

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Old Mar 22, 2025 | 12:00 AM
  #1  
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w211
Om651 Engine Rework

Dear All,
Car W212 om651 came to my shop due to the knocking sound and found due to the engine slapping 2 pistons are scratched in to the cylinder bore
., Now need to engine work !
I am newbie for engine work ,really no idea how to start this project .If I would approach engine bore shop and expecting lost of question from them that should prepare to my self .

Th real Challenges are Used engine block not available in my area , Engine bore team not much professionals or not much advance machines are available .

The work I assume that the engine for cylinders they will put new sleeves or any alternative solutions, if what would be the sleeve measurement how to install the sleeves . as per the workshop manual the om 651 bore size would be 83 mm (3.27 in) so the sleeves inner measurement should be 83 mm then what will be outer :, engine team would remove the original existing sleeves from engine or just bore and reduce the inner size if how much size .
I am really sorry if its are foolish question ...
Could you please please explain to me ....

Thanks in advance.

Regards
Madala













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Old Mar 22, 2025 | 12:33 AM
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2014 - W212.065 - E400 ( M276.820, 3 liter Turbo) RWD not Hybrid
You need MB WIS-EPC software for information. Do not go in blind.
Something like this one, 2020 version is good enough : https://www.ebay.com/itm/383842456251

Or try find seller with online download, easier for you, no need import of the UBS mini stick.
Its like 10GB at the most if I recall, mine is a 2018 bought in DVD , also from Ebay.

Good luck
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Old Mar 22, 2025 | 12:52 AM
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Yes I got WIS and EPC already but this case Wis mentioned replace the engine bock ...
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Old Mar 22, 2025 | 01:41 AM
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W212 MY'14 M276-3.5NA @75kMi
super shaver


deep grooves

this fix needs short-block.


Last edited by CaliBenzDriver; Mar 22, 2025 at 01:44 AM.
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Old Mar 22, 2025 | 10:36 AM
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2014 - W212.065 - E400 ( M276.820, 3 liter Turbo) RWD not Hybrid
The only time I saw someone sleeved W212 engine is Master Tasos on M157.981

.
Perhaps you google OM651 used on commercial vehicle, maybe you will find someone sleeving the block...maybe.


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Old Mar 22, 2025 | 04:16 PM
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W213 All-terrain
651 can't be sleeved, the space is not enough and also the cast is from dead metal. This was micrometric treated with some chemistry and beyond that is just sand


A Second hand engine is the only solution.
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Old Mar 23, 2025 | 12:11 PM
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Information from wis ...
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