Hi all,

I've recently bought a 130i and am really enjoying it, however I do have a question which i'm struggling to find much information on (hopefully that means it's quite a rare issue!).

I'll be honest, I have asked this question on another two forums, and I've had a little response, but not a huge amount of information so was hoping to find a little more information here.


I read about in some rare cases that the camshaft bearing ledge can wear.
Does anybody know why this happens? Why does it only happen on some engines and not all of them?
Is it a manufacturing fault? Design flaw? Bad oil? Oil starvation? ??? - I was hoping somebody could suggest the cause/sequence of events which may contribute to it.


I'm just trying to understand what I can do to make sure this does not ever happen to mine in the future


Thanks!