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Discussion Starter #1
Hey guys here are some photos I took during a tear down of an F10 that came in. Customer brought this M5 in because of a really bad sound coming from the engine. Surprisingly a check engine light never came on or a warning message. Once we brought it into our center we could hear the noise right away. Once we looked over the car and made sure everything externally was ok we performed a compression test. During this test we found cylinder 5 to be the culprit. We pulled the drivers side cylinder head and removed piston/ rod combination from cylinder 5. Hope this sheds light on something that's rarely seen.

https://flic.kr/p/22HNGtBhttps://www.flickr.com/photos/[email protected]/

https://flic.kr/p/21onwW6 https://www.flickr.com/photos/[email protected]/

https://flic.kr/p/22HNFS6 https://www.flickr.com/photos/[email protected]/

https://flic.kr/p/21onwfr https://www.flickr.com/photos/[email protected]/

https://flic.kr/p/HMdRvFhttps://www.flickr.com/photos/[email protected]/

https://flic.kr/p/21onvka https://www.flickr.com/photos/[email protected]/

https://flic.kr/p/21ontPe https://www.flickr.com/photos/[email protected]/

https://flic.kr/p/HMdPXa https://www.flickr.com/photos/[email protected]/

https://flic.kr/p/EAxVe3 https://www.flickr.com/photos/[email protected]/

https://flic.kr/p/EAxUsdhttps://www.flickr.com/photos/[email protected]/

https://flic.kr/p/EAxUdf https://www.flickr.com/photos/[email protected]/

https://flic.kr/p/EAxTR3 https://www.flickr.com/photos/[email protected]/

https://flic.kr/p/EAxTzw https://www.flickr.com/photos/[email protected]/


https://flic.kr/p/HMdMBZ https://www.flickr.com/photos/[email protected]/

https://flic.kr/p/EAxSB9 https://www.flickr.com/photos/[email protected]/

https://flic.kr/p/HMdLXx https://www.flickr.com/photos/[email protected]/

https://flic.kr/p/21onqeD https://www.flickr.com/photos/[email protected]/

https://flic.kr/p/22Fo5u3 https://www.flickr.com/photos/[email protected]/

https://flic.kr/p/HMdLgH https://www.flickr.com/photos/[email protected]/

https://flic.kr/p/21onpBB https://www.flickr.com/photos/[email protected]/

https://flic.kr/p/HMdKqp https://www.flickr.com/photos/[email protected]/

https://flic.kr/p/21onoN2 https://www.flickr.com/photos/[email protected]/

https://flic.kr/p/HMdJMF https://www.flickr.com/photos/[email protected]/

https://flic.kr/p/21ono4g https://www.flickr.com/photos/[email protected]/

https://flic.kr/p/HMdJ7chttps://www.flickr.com/photos/[email protected]/

https://flic.kr/p/HMdHjR https://www.flickr.com/photos/[email protected]/

https://flic.kr/p/21onmt2 https://www.flickr.com/photos/[email protected]/

https://flic.kr/p/HMdGGP https://www.flickr.com/photos/[email protected]/

https://flic.kr/p/21DikWN https://www.flickr.com/photos/[email protected]/

https://flic.kr/p/22Fo71u https://www.flickr.com/photos/[email protected]/

https://flic.kr/p/21Dikpq https://www.flickr.com/photos/[email protected]/

Only very minor scoring on the cylinder walls. Most impressive is that the cylinder bore has a bend about half way facing the passenger side.

https://flic.kr/p/22Fo6zQ https://www.flickr.com/photos/[email protected]/

https://flic.kr/p/21DijZs https://www.flickr.com/photos/[email protected]/

https://flic.kr/p/22Fo6e9 https://www.flickr.com/photos/[email protected]/

The culprit... still amazing this didn't set a check engine light or any malfunction warning messages.

https://flic.kr/p/21Dijv1 https://www.flickr.com/photos/[email protected]/

https://flic.kr/p/22Fo5RW https://www.flickr.com/photos/[email protected]/

https://flic.kr/p/21Dij7L https://www.flickr.com/photos/[email protected]/

https://flic.kr/p/21DiiEo https://www.flickr.com/photos/[email protected]/
 

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Great pictures! Thank you. There were no shadow codes either?
 

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Discussion Starter #7
This is the third S63 we have seen as well.

We have noticed there are a few variables that come into play during this issue. Two things we have seen in common with all three: anything over 700ftlbs and these rods will bend and tune (how the torque comes in and carries across the rpms).
 

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I wonder how much value these cars will loose due to fear of motors going like the e60 m5. Bending the rod would suggest TQ or possibly manufacturing defect? Ive been looking on these for a while now.
 

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I wonder how much value these cars will loose due to fear of motors going like the e60 m5. Bending the rod would suggest TQ or possibly manufacturing defect? Ive been looking on these for a while now.
I'm pretty confident the F10 will be the least valuable M5 thus far. Worst driving, heaviest, worst to work on, turbos... how could it not be?
 

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I'm pretty confident the F10 will be the least valuable M5 thus far. Worst driving, heaviest, worst to work on, turbos... how could it not be?


I was with my tech yesterday and asked him for a low miler F10 M5 to buy and he recommended against it. He said turbos fail easily. So I passed.
 

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I was with my tech yesterday and asked him for a low miler F10 M5 to buy and he recommended against it. He said turbos fail easily. So I passed.


Good thing BMW knows how to make a reliable rubber line ouich
 

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Thanks for the engineer porn! Im working at a lubricants supplier for BMW, therefor many geeky colleagues gathered already around my screen :D
 
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