Relocating Blown and Stripped Spark Plug Holes
Dragon Man demonstrates an advanced technique for repairing stripped spark plug holes in Harley-Davidson cylinder heads. The process involves drilling out the damaged area, inserting a custom-machined aluminum dowel, welding it in place, and then precisely re-machining and tapping new threads. This method allows for the relocation and creation of a new, robust spark plug thread without the need for traditional inserts or the risk of cracking older aluminum heads.











