Well, maybe he wants to do it simply for peace of mind. I did mine recently as I had no idea if they had been previously changed or not. Now I know.
I used a 6" chunk of rubber fuel line that just fit the top electrode on the plugs. Made it very easy to take the old ones out and to start the new plugs into the head. Very handy on the rear plugs.
I used a 6" chunk of rubber fuel line that just fit the top electrode on the plugs. Made it very easy to take the old ones out and to start the new plugs into the head. Very handy on the rear plugs.