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DennisB WiseAutoTools.com © Summary: Part of our ongoing effort to help make spark plug threads great again. Seriously, we specialize in thread repairs and this is a brief article on do's and don'ts in regard to spark plug thread repair. Spark plug threads in an engine can deteriorate when they’re loose due to vibration, resulting in a sparkplug blowout. Aluminum threads in the cylinder head can also be damaged if cross threaded or “seize” due to dislike metals. Ford 2V engines typical …