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Message: <blockquote data-quote="cempaka" data-source="post: 368446" data-attributes="member: 7014">First do a wet/dry compression test to get some hard data about the condition of your engine.  Who knows you might not even need an overhaul to begin with.  If you do decide to proceed with an overhaul, it will also give you information on where problems might be.Top overhaul depends on the shop, both how fast they work and how they define overhaul, and also on the condition of your cylinder head. But yeah around 4-5 days is a good guess.I agree that you shouldnt bother with the bottom overhaul.  130k km is nothing for a BMW bottom end.  As long as your piston rings are still sealing well, which it sounds like they are, it's pointless and could actually end up worse after the overhaul than before (eating oil etc.)If you are still itchy youre better off spending that money on having some basic flow work done on your cylinder head while it's out.  Porting, valve job, etc  will give you added power if done correctly.</blockquote>