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Message: <blockquote data-quote="mangkor" data-source="post: 306052" data-attributes="member: 14483">En. Ribena,Nikasil was used starting with M52 engines. It's a process where I think they apply that material directly into cylinder bore like anodizing or electroplating since I didn't see a clear transition area that clearly separate the engine block and cylinder liner (which means it was made in two different component). I feels that the process also justify that the engine block cannot rebore since rebore process will take away that particular Nikasil layer.I'm sorry I don't have the fact sheet regarding magnesium block construction. To justify what, how, which..etc, I need to dig even further into BMW service info.Just be patient pls... once I got it, I will share it with ya all...see ya...</blockquote>