My coworker pulled his 07 Taurus into our building (3rd shift- no one knows) to do replace his sparkplugs. 1st one out- new one in. Second plug..........threads came out on the plug. I HAD FORGOT THET EVEN THE V6 FORDS HAD THREAD/LACK OF THREAD PROBLEMS OF THAT ERA. New plug would NOT install. He had it flatbed hauled to a shop and some type of insert was installed. The other 4 plug replacements have been delayed until he can afford the possibility of more inserts needed.