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Message: <blockquote data-quote="wc9922" data-source="post: 295076" data-attributes="member: 6000">I will try and find the documentation, read it before somewhere. BMW's and their  engines in particular are among the most advance in the world, always trying to do something radically challenging every time they launch the new series. So with that comes the problems that come with it. As a company, I think it's in their best interest to not announce but behind the door, they are working to solve the problem. That's why unsolvable, repairable engines they would issue new ones  but the request for engines from the warranty department is quite a tedious task. There are many test and documentation and procedures to be done before the approval for new engine is given. That's why it takes time. But the procedure may not be revealed to the customer in detail. That's their job. Normally there's a techical upgrade engine later on. For N52 the upgraded engine is called N52KP or N52N. Part of their development cycle. New N52KP engines will have the same cc with different power outputs. One new feature of this engine are hydroformed camshafts i.e camshafts formed from tubular pipe blanks with high water pressure passed inside the tube within a mould to form the cam lobes and bearings. That's really advance stuff. These engines should be in cars from 2007 upwards production.</blockquote>