I have look everywhere but could not find the answer. I have been replacing my coils as they have been going bad on my 2004 5.4 F150 and when i replaced the one I ended up stripping the threads in the hole. I found thread repair kit called Time-Sert but I'm not sure what size to get. If anyone could help me out that would be great. Also if you have ever used those Time-Serts I would appreciate any feedback on them. Thanks

 

I am guessing you are referring to your spark plugs, and not your COPs.
Time-Serts are awesome btw. I used them on my honda when one of the head bolts stripped out. Life saver.

Also, a buddy of mine stripped his spark plug threads out 2 weeks ago and I put the time-sert in for him. Piece of cake

 

This happend to me yestraday i havent got around to fixing it. Its the bolt hole that holds the COP in place right? Crappy design.

 

yesterday**

 

Yeah the bolt hole that holds the cop in place. I just zip tied it place for now but its moving around alot so I want get it fixed right.