Quote:
Originally Posted by Hatterasguy
How bad can the BMW V12's be? In my experience the Mercedes V12's are quite good. My friends S600 has never had an engine problem in the 10 years he has owned it, just an SLS problem once on awhile.
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They had a lot of unique parts like 2 separate ECUs with 2 separate electronic TBs. They suffer from a lot of vacuum leak issues which leads to emissions failures among other things. Low mileage M70s are all over the JYs. There is nothing inherently wrong with the V12 configuration. Its BMW's electronics, seals and packaging. The M62 was a much better sorted engine. M60 had its own cylinder bore wear problem but those are mostly off the road by now.
BMW built an E32 prototype with a V16 version of the engine. The radiator had to be moved to the back to make room.
http://www.zorro.milk-maid.de/scans/e32_v16.pdf