Originally Posted by rudedogii

I have 2000 V-10 with 150,000 miles and have never had a plug problem.
Then again I dont let anybody touch my engine. I have only changed the plugs once and made sure to install them buy the book. I used antisize and torqued to specs!
Now many people take their trucks to a shop instead of the Ford dealer for this kind of work and alot of shops will have an inexperanced mechanic do a simple job like changing plugs. All you need is some one to over torque the plugs once.
Thats just my thery!
Years ago I worked at a shop and I seen somethings done, bad things!
Thats why I always check my front end after an wheel alingment. I recomend my alingment shop, but sometimes they leave lose bolts on the adjustment sleeves.