Replace plugs now??????
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Junior User
Joined: May 2009
Posts: 86
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From: Wisconsin
Replace plugs now??????
Have been reading about the broken plug problems.
Would it be wise to just replace them now after only 28,000 miles before they really bond to the head.
I have the 5.4
Would it be wise to just replace them now after only 28,000 miles before they really bond to the head.
I have the 5.4
Posting Guru
Joined: Nov 2006
Posts: 1,296
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From: muskegon mi.
i did mine at 60k go at least that far that will give you time to get the right tools look up the right process( cause 2v is differant than 3v) and you can research your next set of plugs dont ask here because no one will agree on a plug
Posting Guru
Joined: Mar 2007
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If you are talking about your 06... I have the same engine. Triple patnums go for a long time. I have 46000 on mine. I wouldnt even consider it yet. Maybe at 100,000 miles. But the dealer says only change them if they are missing. My brother has original in his 4.0 liter and it runs like a top at 186000?? it is all different now
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Junior User
Joined: May 2009
Posts: 86
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From: Wisconsin
Yeah normally I wouldn't consider changing them at 28,000.
But are the factory plugs the two piece design that break easy.
I was thinking preventative maintenance vs scheduled maintenance.
But are the factory plugs the two piece design that break easy.
I was thinking preventative maintenance vs scheduled maintenance.
Senior User
Joined: Mar 2006
Posts: 350
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From: Frankford, NJ
change them. usually i would say change the plugs between 75k-100k, but with these plugs, get them out. you don't want to get yourself to the point when you have a misfire and you are pressed for time to get it done. if you are a do it yourselfer, set aside a weekend to do it. many people around here say that they have had good luck with using marvel mystery oil before they changed the plugs. but i won't use anything with the word "mystery" in it. champion makes a one piece design plug, but i prefer to use motorcraft in all fords. it is still a 2 piece plug, but they are welded together instead of pressed together as were the original plugs. just ask your fors dealer for the correct plug number. follow the tsb for the removal and i suggest purchasing the tools for removing the broken plug because it is better to be safe than sorry. and here is my thread from when i changed mine at 50k:
https://www.ford-trucks.com/forums/8...broke-2-a.html
https://www.ford-trucks.com/forums/8...broke-2-a.html
Senior User
Joined: Feb 2005
Posts: 428
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I was watching an episode on HorsePower TV about the E3 plugs and they actually added some HP to an engine. Nice spark too.
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You Keep What You Kill
Joined: Dec 2006
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From: Huntersville, NC
I agree with the OP and others that it is wiser to change the plugs now than wait until the recommended maintenance period. My F350 has 31,000 miles on the engine. I definitely will try the Marvel Mystery Oil to make the job easier... my grandfather is a true believer in MMO! I plan to use the Denso plugs for better performance. I also plan to replace the COP's with either Motorcraft or Sultans of Spark (SOS).
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Posting Guru
Joined: Mar 2007
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What are COP 's I will feel stupid after you tell me 
I did not realize they are 2 peice plugs... I learned something...
ARe the E3 plugs safer then the old split fire plugs???
I have always opted for Autolight in Fords but these engines are all together different.
I did not realize they are 2 peice plugs... I learned something...
ARe the E3 plugs safer then the old split fire plugs???
I have always opted for Autolight in Fords but these engines are all together different.
Posting Guru
Joined: Mar 2007
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Moderator
Joined: May 2005
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From: San Antonio, TX
Might as well leave them in until 200k miles or so. 
https://www.ford-trucks.com/forums/870642-thanks.html
https://www.ford-trucks.com/forums/870642-thanks.html
Senior User
Joined: Jan 2004
Posts: 294
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From: Michigan
The only plugs available for these engines are Champions, Motorcraft & Autolite's. The champions are the best choice, they 2 parts are welded together and will not seperate, like the Motorcraft's and Autolite's.
Senior User
Joined: Dec 2008
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What year did Ford start putting these plugs in the F-250? I think I read somewhere it was from 2005-2007. I have a 2004 5.4 F-250, just wondering if I have them or not without pulling one to see. Don't like to mess with something that isn't broke.
Fleet Owner
Joined: Dec 2006
Posts: 20,637
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From: Lost in Pa.
I'm pretty sure your OK, yours should be a 2 valve 5.4, the 3 valve motors are the ones that have the problem.