Forum Discussion
ib516
Jun 11, 2019Explorer II
Grit dog wrote:
I believe, hope, that having a good coating of antiseize on the smooth portion of the plug below the threads will keep the part that breaks off from rusting or carbon up.
The plugs that came out of the Mustang had zero carbon but the entire lower portion of the plug that can get stuck and break had a solid coat of rust on them.
Stainless plugs (if they make em for this application) like used on boat engines could also be a solution.
I did find that Motorcraft made a wholesale part number change for the factory spec plugs. Maybe they're improved?
They went from the original 2 piece design (where the smooth part was it's own piece) to a one piece design where the threads and the smooth part are formed from one piece of metal. I have heard it helps. The "South Main Auto LLC" channel on YouTube has some good videos on the subject.
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