Is this something I can do with the distributor installed? I didn't know this grease cup even existed before I read this thread. Now I'm a little concerned seeing how other maintenance items on my truck were in need of attention. I saw the location of the grease cup today, and am not sure I'll be able to tell if the fiber plug is present or not. I'm sure I can remove the grease cup, but am not sure if it will do any good to add grease if that plug isn't present and the spring is riding on the shaft.
