Well, I changed the plugs on my '04 5.4 w/ 98,000 miles. 3 out of the 8 broke, with one leaving all the porcelain in and only the threaded nut portion came out. Managed to break it off even with the bottom electrode then used the Lisle tool to get it and the rest of them out. Used carb cleaner and Seafoam Deep Creep to soak down the plugs. The carb cleaner mix penetrated down to the 5 that came out, and did not make it down to the 3 that didn't. All were cracked a 1/4 turn on a warm engine, set for about an hour. After about 6 hours on this the truck runs like new. All the old plugs looked decent exept for the front drivers side, which the electrod end was partially burnt off. Not a hard job, just need alot of patience.

 

Cool!

 

Good job! Glad you succeeded.

 

Glad the change out worked OK, my '04 with 95k miles on the originals won't be coming out untill the truck start's running rough.

 

Good work.