Helping an older friend with his F150

Ran across numerous comments about spark plugs breaking and not seating when replaced.

Seems they also require ' reaming ' of the carbon buildup in the head to reduce chance of breaking off next time and also causing plug not to fire properly.

https://www.aa1car.com/library/ford_broken_spark_plug_problem.htm#:~:text=Spray%20some%20WD%2D40%20or,over%2080%2C000%20miles%20on% 20them).

Sure is a weird looking spark plug.