02-25-2013, 07:17 AM | #1 |
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N20 all aluminum block
I just realized that N20 does not have steel sleeves at all in the cylinders. It has steel coating instead - "electric arc spraying technology". Hopefully it does not turn into Chevy-like failure over time. Makes me wonder why they do not offer extended warranty over 100K miles.
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02-25-2013, 09:15 AM | #2 | |
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02-25-2013, 09:59 AM | #3 |
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Here is some discussion regarding N20 where 4.5 Year / 55000 mi is mentioned as the reliability threshold.
http://www.bimmerfest.com/forums/sho...d.php?t=643442 Not sure where they got this data though. |
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02-25-2013, 10:57 AM | #4 | |
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My guess is that they are having enough trouble keeping up with emissions and economy standards in their designs to both meet them and planned obsolescence to such a high degree. |
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02-25-2013, 01:04 PM | #5 |
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Here is the description of the coating technology used by MB. Which is likely the same for N20 engine.
http://www.azom.com/news.aspx?newsID=30457 |
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02-25-2013, 02:30 PM | #6 | |
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According to the article on MB linked above they have been using this tech since 2005. I think every car company is pushing to reduce weight and manufacturing complexity wherever possible. They do make mistakes (google "BMW Nikasil") but I dont think they are intentionally designing things to fail. |
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