When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
In January 2021 I bought my 2017 GTS (27K miles) with a seized motor in it. I had a 13 k miles donor motor on hand and by the end of May 2021 I completed the installation of it together with the upgraded drive shaft since everything was out of the car. I have enjoyed driving it a lot since that time (now at 32k miles)
By participating on this forum I have had the pleasure to exchange information with several (new to me) nice friends here on this forum. As I have had some other ongoing projects (a SL63 engine out head bolts rebuild) I did not have the time until now to pull the original motor apart to see what went wrong with it. The story I got from the PO was that a road hazard (spike) damaged the oil supply tube to the oil reservoir and they (however was driving he/she, he did not say) heard a loud sound but did not see any external body damage to the car.
This week I finally got around to pull the original motor apart and hereby some pictures of my initial findings. I have decided to share these here to warn/alert others how to be careful and keep an eye out for any objects on the road that can harm these low to ground cars.
No problem in keeping pics. PM me if you want me to email them to you I'm going to brain storm with Stenzel to consider rebuilding it or just keep the parts.
Incredible crankshaft breaking ...
Do you know why it broken like this ?
Extra turbo pressure after a remapping ?
Or direct intake filter and engine has kept some water ?
I only answer very briefly. I'm tired and it's already after 3:00 am.
Your engine ran dry for a long time. That would not have happened with oil pressure monitoring and a less pain-free driver.
You have not set a picture of the cylinders, but I can imagine with a cracked connecting rod.
Damage over 0.05mm and overhauling will not be possible.
The blocks are no longer made for this and it is no longer intended. There are also no oversized pistons.
(Was already like this with the M112 / 113. Also had no more sleeves inserted)
The cylinder blocks were no longer made to be bored out.
All new MB engine blocks (M156 was the first) only have a very thin (approx. 0.1 mm) coating of iron-carbon, this is "sprayed on" in an arc process.
If you are interested, google it: Nanoslide
There are no oversized pistons. Could you work with repair sleeves?
Little material between the cylinders (90mm cylinder distance with 83mm bore)
And the engines develop a very high working pressure.
Maybe there is a shop that can "Nanoslide". I don´t know.
I "overhauled" M112 supercharged engines. (Rare and expensive) Change allways the block if there is even a slight damage.
With a used one. The naturally aspirated engine block fits, and there are plenty of them. (Indestructible and were built into every MB)
They have a different method of surface treatment (cast-in Silitec sleeves, these are "etched")
Even after 100,000 mls, no measurable wear. Look like new. Mileage of 200,000mls, normal. 300000mls no exception.
I think the Nanoslide coating is even better. With good care, the parts are indestructible. At least as far as the cylinder and block are concerned.
Unless, as in your case, they are murdered.
I would keep it as a spare parts carrier. Then you have all the spare parts. All the little, expensive things
In the long term, it should help you more, than a hole replacement engine. (with time and money in it)
I apologize for mistakes. i am tired.
Best regards
Stenzel
P.S.
Don't reveal the mechanic's name. You're ruining his life. He's sure to have a family, wife, children ... :-)
And a lot of AMG drivers with the same badge became panic. :-) :-) :-)
Last edited by Stenzel-Germany; Nov 16, 2021 at 10:19 PM.
P.S.
Don't reveal the mechanic's name. You're ruining his life. He's sure to have a family, wife, children ... :-)
And a lot of AMG drivers with the same badge became panic. :-) :-) :-)
This is a great write up - thank you, I look forward to reading things like this as I always like to disassemble and know how/why things work the way they do. I wish I had the space and time you have to do this kind of stuff! Maybe when I retire!
2025 Lucid Air Grand Touring, 2022 F-150, 1926 Rolls-Royce SSG roadster
Originally Posted by 57 GTR
Best regards
Stenzel
P.S.
Don't reveal the mechanic's name. You're ruining his life. He's sure to have a family, wife, children ... :-)
And a lot of AMG drivers with the same badge became panic. :-) :-) :-)
Agreed.....
I'd sure like to know. Carelessness has its consequences.
Beyond that I doubt an automobile fan board would ruin anyone's life. I suspect if Mercedes-Benz and AMG were interested they could have figured it all out by now.
How about this as a compromise. We have a thread on who built your AMG GT's engine. (There are two, the first one is currently active.) Can you take a look at that thread and tell us if the engine builder who dropped the bolt is identified in that thread? https://mbworld.org/forums/coupe-roa...-s-engine.html
The fact is that I found an extra bolt, however I have no proof that it was the engine builder who dropped it in there, as AMG states "one man one engine" it would be an assumption on my part or others that it was the builder who made the mistake.
As for me it remains an assumption and I have nothing else to say about it!
The fact is that I found an extra bolt, however I have no proof that it was the engine builder who dropped it in there, as AMG states "one man one engine" it would be an assumption on my part or others that it was the builder who made the mistake.
As for me it remains an assumption and I have nothing else to say about it!
Best H
Is there ANY way it could have got there during the engine destruction?
2025 Lucid Air Grand Touring, 2022 F-150, 1926 Rolls-Royce SSG roadster
Under the doctrine of res ipsa loquitur the fact that it's "one man, one engine" points to the "one man" who was working on that "one engine." Unless the bolt fairy flew overhead while the one man was at lunch and dropped the bolt into the engine.
2025 Lucid Air Grand Touring, 2022 F-150, 1926 Rolls-Royce SSG roadster
Originally Posted by 57 GTR
Chances are slim it was him/her, no need to worry... I would worry more about some idiot running into me while I am driving,lol
"Her"? "One man, one engine." Although I bet there are some women doing this work, too, since the slogan was created. Women mechanics proved to be very reliable on aircraft assembly during World War 2, so why not?
"Her"? "One man, one engine." Although I bet there are some women doing this work, too, since the slogan was created. Women mechanics proved to be very reliable on aircraft assembly during World War 2, so why not?
Mercedes SLR McLaren 722 S Is Extremely Rare Example Modified by McLaren
Slideshow: A one-of-one U.S.-spec Mercedes-Benz SLR McLaren Roadster became even rarer after a factory-backed transformation at McLaren's headquarters.
