how do i get spark plug threaded
https://www.youtube.com/watch?v=mHCv0xmeLHg take a look here, it should be pretty easy, and these are common cars so the parts guy at Ford should be able to tell you what size kit you need. Never play with the plugs while the engine is hot, or even warm. It will always cause damage to these heads.
https://www.youtube.com/watch?v=1BTTur7Fk6k or check this one out.
Yes, this is a known problem at Ford. Your local Ford dealer's parts person should know how to best advise you. HTH. -Jim
Looking for a Used Crown Victoria in your area?
CarGurus has 960 nationwide Crown Victoria listings starting at $1,496.
Search Ford Crown Victoria Questions
Ford Crown Victoria Experts