Sometime around 2000 or 2001 they redesigned the Triton heads with additional threads since there were a lot of the 1997-1999 motors that spit the plugs out. My 1997 5.4 hasn't had it happen yet (174,000 miles knock on wood) but supposedly the chances of having a problem if using the motorcraft plugs is a little less if the plugs are torqued correctly without antiseize.
The redesign helped but didn't fully correct the problem. My step dad's F150 was an 05.
OFFTOPIC
Well there we are.... now this thread contains information saying to ALWAYS use anti- seize and NEVER use anti- seize.
Seriously though, having threads that are too short and having combustion pressure actually blow the spark plug out of a head is a very different problem than having a spark plug's threads seize in a head. In fact, these two problems are totally unrelated. If those Fords are actually <shearing> the aluminum threads off to eject the spark plug then I really cannot see how anti- seize, or any thread compound of any type, could change the likelihood of that happening.
Back ONTOPIC:
But let's all remember that ejecting spark plugs is NOT a C-14 problem and this discussion is about Ford Triton engines. Otherwise this could turn into another internet legend about C-14s ejecting spark plugs through the frame and fuel tank only to have them pierce the rider in the butt....
Brian
That is one heck of a ricochet to have a spark plug hit you in the butt. Unless your riding your C14 backwards, Do you? Is that to protect your family jewels from a spark plug being ejected from the engine?
Anyways Back ontopic I just felt compelled to bring it up because you said to always use antiseize and it will solve all your problems. Antisieze will solve a myriad of problems to be sure, but not all of them. I had to prove that the great B.D.F. could be mistaken. I'll sleep better tonight knowing I have done that. Or else the Large quantity of alcohol I've imbibed in will do that. I'm not really sure which.
Have you ever tried to proof read your post when your toasted? It's a lot harder than it looks.
And back on topic, My bike has 7k miles on it. I shouldn't have to worry about spark plugs anytime soon. I think. Unless it blows them out of the heads. Can that happen? I read on the internet somewhere that it can happen. I don't want that to happen. That would be bad.