5.4 spark plug replacement tips

[RJDCobra]

Just use an impact wrench. It'll be fine.

x2, as crazy as it sounds it's the truth. out of the 100's of 5.4 3v i have done, never once broke one with using a impact.

[DFWtechie]

Guess I got lucky, I took it real slow and they all came out in one piece, threw some anti-seize on the new plugs (below the threads) and called it a day.

I did that as well and it went south a few days later when the anti seize worked its way down to the electrode and fouled 2 plugs.

[blackedv]

i just back the plugs off a quarter turn and then fill up the plug well with berrymans carb cleaner for 30 minutes on a warm engine. have yet to break one

[jasonw_2005]

Anyone know if the 4.6's are badd about this as well?

[JimD]

Just use an impact wrench. It'll be fine.

How small an impact you got? Aint no way any of mine will get the back 2 plugs. I use an air impact ratchet. i do soak them with pb first. Not really a big deal if they break, the extractor works fine. Ive only broke one since using Pauls tip on the impact ratchet.
And yes the tsb also says 4.6 per alldata.

[06S197GT]

Anyone know if the 4.6's are badd about this as well?

yes, though in 07 ford changed the heads to use the 1 piece design.

@DFWtechie, 3 months and no issues I should have mentioned i used very little anti seize (no where near the electrode).

[GADDIS]

x2, as crazy as it sounds it's the truth. out of the 100's of 5.4 3v i have done, never once broke one with using a impact.

Speaks the truth.