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Johnson's Machine Shop's lead engine builder Tim Yates spends as much time hand-prepping the block as he does on any other stage in the process. Every oil gallery, water passage, and threaded hole must be chased to make sure no stray particles or casting slag is left to do damage later on. Also, all the passages are chamfered at the deck to make sure they do not interfere with the gasket's ability to seal between the block and head. View Related Article
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