[aptwave]

Hi everyone,

I'm the "happy" owner of BMW M3 E92, 2012 production year with only 31 000 miles on it.

And I have main bearing failure which leaded me to seized engine...

It happened on a first gear, after a really light pull, not even passing through 5K RPMs and I already started breaking and my engine got seized.

My engine is not disassembled completely, we just removed oil pan, oil pumps and found failed bearing, so have no idea about crankshaft and engine block condition.

Before doing complete disassembling, I want to ask few questions to the community and to people who already re-built S65B40 engine in the past, after similar failure especially. Just need to fill my expectations of how much it will cost for me to repair engine.

So, the questions are:
- If our crankshaft can be repaired(machined and polished) in case it has scratches on it? Or it should be replaced in 100% of cases?
- If our engine block, place where main bearing sits, can be repaired too?
- If I can get correct bearing/crankshaft clearance with any kind of bearings? I know that there's 3 sizes exist for main bearings, but if it's no enough - if there's any aftermarket bearings or company who can produce them? Or add special coating?

Thank you.

P.S. I'll add some pictures later and will update about engine state and solutions we probably going to go.