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This video shows how to fix stripped head bolt threads from BMW M52 engine block. Same procedure works also for M52TU and M54 engines. and The Time-sert head bolt thread repair kit for M52 aluminum block is part number 1090 but the kit i'm using in this video is part number 1015. Addition to that I have 14 inserts for M52 block and the part number for those is 10155.