Replaced plugs in my new-to-me 2006 XLT yesterday using 3/8" air impact gun. #1 and 4 broke so I needed the Lisle tool and it worked great. 5 hours isn't the longest time for this repair I'm sure but we're back on the road and running good.
Gary
To add a little more detail about my successful plug change. The motor was hot when I started but by the time I got PCM and coil pack removed, figured out the right extensions to use and dealt with the new locking 6" socket extension that fell apart (autozone special). I used 3/8" air impact wrench and took out the first 4 without problems (installing the new plugs with nickle anti-sieze as I went). By now (2 hours in) the motor had cooled alot. The 5th and last plugs broke and the Lisle tool worked great. I just couldn't understand the "breaking the plug loose 1/8 to 1/4 turn then soak with penetrating fluid". If the nose of the plug is stuck in the head due to carbon build-up, forcing the plug should break it. If the penetrating fluid method resulted in 100% sucess, I would have gone that route. I ran 2 tanks of gas with Techron addative and Seafoam in the booster vac line last weekend. Seems to me cleaning the plug/ inside cylinder is the best approach. The plugs came out very clean to my eye with a thin, light tan deposit on nose of plug. The broken plugs even looked ok. If the motor were warmer, I wonder if all could have been removed complete. It really isn't as bad a job as some make it sound. Good luck, Gary
