So...here's how it's done when the engine is together. On my friends '69 HD Shovel Head.
|The weapon. This tap does a couple of different jobs. The end will act as an insertion tool for the threaded insert, it has a ramped cutter, and the upper section will cut the threads for the insert.|
|You need something to keep the chips from falling into the cylinder. CV axle grease is great for this job. It is thick enough to stick to the tap, but not too thick to be cleaned off easily.|
|Cotton swabs and grease are cheaper than engines. Take your time, keep it clean. I hate when my feet get in the shot, they're exhibitionist like that. I'm too lazy to edit a picture this morning.|
|The stressful part is over.|
|BAM! The spark plug is back in.|