Ml 550 Motor blown
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Newbie
Joined: Jan 2024
Posts: 10
Likes: 3
From: Canada
1981 Mercedes 300CD 2008 Mercedes CLK 550 2014 Mercedes ML 550
Ml 550 Motor blown
Hello everyone, I’ve been experiencing my motor slowly losing compression and after a long 25 000 kms it has given up. I’ve lost half the motor (Cylinders 5,6,7,8)
I have a 2014 W166 ML 550 and am wondering if it’s possible to do a motor swap with any of the following M278 motors as it’s impossible to find an ML class motor. As it all seems good to go my concern is buying it and it not fitting
CLS 550
GL 550
S 550
And more…
any help is appreciated thank you
I have a 2014 W166 ML 550 and am wondering if it’s possible to do a motor swap with any of the following M278 motors as it’s impossible to find an ML class motor. As it all seems good to go my concern is buying it and it not fitting
CLS 550
GL 550
S 550
And more…
any help is appreciated thank you
Last edited by BMWclapper; Jan 19, 2024 at 09:19 AM.
MBWorld Fanatic!
Joined: May 2021
Posts: 2,524
Likes: 2,041
From: US
2008 E350, 2012 ML350, 2014 E350, 2015 ML350
Worth listening to the effort to find a decent M278, and what you may be against.
Hope you are aware the M278 engine cylinder material changed during production, @March 2015 from aluminum coated to iron-cast coated cylinders. You may want to look for an engine after that date. However, they are also apparently prone to cylinder scoring. The issue may be the coating, and not the core cylinder material though.
Here for the M278 thread in the W212 forum ( https://mbworld.org/forums/e-class-w...ml#post8905320)
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Joined: Jan 2016
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From: In the Shadow of the Tetons
2013 ML350 Bluetec
If you're handy and have the space and tools, would it be worth pulling your engine (a known quantity) and having it rebuilt? Nothing like putting somebody else's unknowns under your hood...
Thread Starter
Newbie
Joined: Jan 2024
Posts: 10
Likes: 3
From: Canada
1981 Mercedes 300CD 2008 Mercedes CLK 550 2014 Mercedes ML 550
https://www.youtube.com/watch?v=d5-xCjmF0E8
Worth listening to the effort to find a decent M278, and what you may be against.
Hope you are aware the M278 engine cylinder material changed during production, @March 2015 from aluminum coated to iron-cast coated cylinders. You may want to look for an engine after that date. However, they are also apparently prone to cylinder scoring. The issue may be the coating, and not the core cylinder material though.
Here for the M278 thread in the W212 forum ( https://mbworld.org/forums/e-class-w...ml#post8905320)
Worth listening to the effort to find a decent M278, and what you may be against.
Hope you are aware the M278 engine cylinder material changed during production, @March 2015 from aluminum coated to iron-cast coated cylinders. You may want to look for an engine after that date. However, they are also apparently prone to cylinder scoring. The issue may be the coating, and not the core cylinder material though.
Here for the M278 thread in the W212 forum ( https://mbworld.org/forums/e-class-w...ml#post8905320)
that’s great to know and thanks for the video link, I had no clue.
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Joined: Jun 2014
Posts: 1,085
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From: Melbourne, Australia
2010 ML550 VIN WDC1641722A564750, 2010 B180
Thread Starter
Newbie
Joined: Jan 2024
Posts: 10
Likes: 3
From: Canada
1981 Mercedes 300CD 2008 Mercedes CLK 550 2014 Mercedes ML 550
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MBWorld Fanatic!
Joined: May 2021
Posts: 2,524
Likes: 2,041
From: US
2008 E350, 2012 ML350, 2014 E350, 2015 ML350
Here is my motto when buying MB used parts that seem the same as the one I already have:
1 - Ask if the VIN of the donor is available
2 - Input VIN into the EPC or one of the MB online parts store
3 - You may see several options for the "same part" based on the VIN. With a list of compatible Model/Class
4 - The last stick is: even if the part is identical, the donor car features are identical, it may still be considered theft relevant --> Coding is required.
For example, the M276 NA is different in all classes. The ML350 requires more oil than the E350 which I assume is a different oil pan.
Summary: they may look the same to the naked eye, but there can be subtleties; therefore, research is required.
1 - Ask if the VIN of the donor is available
2 - Input VIN into the EPC or one of the MB online parts store
3 - You may see several options for the "same part" based on the VIN. With a list of compatible Model/Class
4 - The last stick is: even if the part is identical, the donor car features are identical, it may still be considered theft relevant --> Coding is required.
For example, the M276 NA is different in all classes. The ML350 requires more oil than the E350 which I assume is a different oil pan.
Summary: they may look the same to the naked eye, but there can be subtleties; therefore, research is required.
Last edited by JCM_MB; Jan 31, 2024 at 06:27 PM.
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MBWorld Fanatic!
Joined: Jun 2014
Posts: 1,085
Likes: 442
From: Melbourne, Australia
2010 ML550 VIN WDC1641722A564750, 2010 B180
Im not 100% sure. Certainly for ECU change. Not every part on every engine that looks the same, is the same. So you will probably find a conflict between engines and their modules and sensors. In any event, I'd be preparing for such to happen. Finding an engine with exactly the same parts as what you have, noting that MB update various bits over time, is unlikely and you probably won't know until you try it.
