Question about 2005 Ford F-150

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Broken spark plug in the head on a 2005 Ford F-150 5.4L

What do you recommend for changing the spark plugs without breaking one? I have a 2005 Ford F-150 with a 5.4L and I've been told that the rear spark plug can break off in the head.It only has 40,000 miles on it but I want to avoid any problems in the future

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  • mustang7mike May 12, 2009

    Thanks for informing me about reading the owners manual.It doesn't say anything in there about removing broken spark plugs when it reaches 100K. I have heard horror stories about waiting to change plugs at 100K and they break off in the head because of a poor design in the head and it could cost 2-3 thousand to repair.I heard the plugs should be removed at 30 -40K and be coated with never seize to prevent a problem in the future.Thanks for your help anyway.I think I know what to do from here on.

  • yadayada
    yadayada May 11, 2010

    I work in a Ford dealer never had any problem removing plugs. do u have igh quality tools, make sure the socket is well seated onto the plug base. It is not a faulty design, this is a great engine in every way.

  • yadayada
    yadayada May 11, 2010

    in the 1st place the plugs don't need to be replaced until 100,000 miles, so u have given yourself a big headache over a service that wasn't needed, do u read the owners manual?



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I also work at a dealer, and it is a poor design. carbon biulds up on the extension of plug and you cant get out.Have a broken plug in front of me as i speak. Change plugs at 40 k or you will pay!!!

Posted on Jun 10, 2009

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Typically when you break a spark plug, it is the ceramic portion that breaks. the bit left in the engine would still be removable. if your worried, just spray a little bit of wd40 on the plug and let it sit for a few minutes. they should come out alright... just take care not to break the new ones on installation

Posted on May 11, 2009


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Be careful !!!

Good Luck

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