spark plug change......YOU CAN DO IT!!!!
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Joined: Aug 2004
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spark plug change......YOU CAN DO IT!!!!
2004 5.4 with 126,755 miles. ok folks, keys for success are as follows:
1. use techron concentrate for three(3) tankfuls
2. operate on cold engine (8 hours minimum idle time)
3. soak with SEAFOAM DEEP CREEP (8 hours minimum), before initial 1/4 turn cracking
4. when cracking 1/4 turn, listen and feel, screeching and popping are good things (indicates all parts of plug are moving as one unit)
5. walk away and soak another 8 hours (minimum), one application of SEAFOAM DEEP CREEP is all that is needed
6. grab your tools and just unscrew, and no, DON'T, i repeat, DON'T work plug back and forth. continuously turn counterclockwise
i know what you're thinking......THIS GUY'S FREAKIN' NUTS!!! well that's true, but here's the SECRET:
the OTC 6918 tool......follow instructions previously mentioned with the OTC 6918 in use and it will not fail you
p.s. reading countless posts and viewing videos 'til i was blue in the face, really gave me the confidence to attempt this much feared and dreaded task
1. use techron concentrate for three(3) tankfuls
2. operate on cold engine (8 hours minimum idle time)
3. soak with SEAFOAM DEEP CREEP (8 hours minimum), before initial 1/4 turn cracking
4. when cracking 1/4 turn, listen and feel, screeching and popping are good things (indicates all parts of plug are moving as one unit)
5. walk away and soak another 8 hours (minimum), one application of SEAFOAM DEEP CREEP is all that is needed
6. grab your tools and just unscrew, and no, DON'T, i repeat, DON'T work plug back and forth. continuously turn counterclockwise
i know what you're thinking......THIS GUY'S FREAKIN' NUTS!!! well that's true, but here's the SECRET:
the OTC 6918 tool......follow instructions previously mentioned with the OTC 6918 in use and it will not fail you
p.s. reading countless posts and viewing videos 'til i was blue in the face, really gave me the confidence to attempt this much feared and dreaded task
DIY - If it works for you, I celebrate 
with you no matter how you choose to do it, 
Laughing Gas
Joined: Dec 2009
Posts: 799
Likes: 13
From: East L.A.
Doing my 4.6 today. Much less stress. 97K is time.
Finished after 4 freaking hours! I don't know if I would have the patience to change plugs in a 5.4L! I certainly am understanding why the mechanics charge so much for F-150 spark plug changes now. Makes me miss my old '73 Chevy 350, and '92 F-150 300 I-6 for sure...
#3 cylinder plug was loose- a surprise. Thanks factory. That plug was filthy from the blow-by, and the boot had some mild heat damage, with light corrosion on the coil spring where it attaches to the top of the spark plug.
Finished after 4 freaking hours! I don't know if I would have the patience to change plugs in a 5.4L! I certainly am understanding why the mechanics charge so much for F-150 spark plug changes now. Makes me miss my old '73 Chevy 350, and '92 F-150 300 I-6 for sure...
#3 cylinder plug was loose- a surprise. Thanks factory. That plug was filthy from the blow-by, and the boot had some mild heat damage, with light corrosion on the coil spring where it attaches to the top of the spark plug.
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