Replacing spark plugs

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FamExp18

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If engine is running smooth at 131k miles, should plugs be replaced anyway? Been told the 3rd gen Triton plugs tend to fuse in place.
 

ManUpOrShutUp

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I would change them. A bad plug can take the accompanying COP with it. Besides, things rarely seem to fail when you're 2 blocks from home, but rather when you're 50 miles from home in the middle of the forest and need to be up for work at 5AM.
 

ManUpOrShutUp

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So true. When you replaced yours, how much did it cost you?

I just did the plugs (no COPS, will replace those as needed) and did them myself. I paid ~$40 for 8 plugs (Motorcraft SP-509) at Advance Auto after coupons, etc. The plugs in the back are a ***** to reach, but other than that they're easy on this vehicle. A good variety of swivel sockets and extensions will make things much easier.
 
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FamExp18

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What was the "fusing" bit that I heard about, or was that just a lie? Shop owner was talking about needing to use some specialized tool to get them out in one piece.
 

ManUpOrShutUp

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What was the "fusing" bit that I heard about, or was that just a lie? Shop owner was talking about needing to use some specialized tool to get them out in one piece.

Any plug that's been left in for that many miles is prone to be more difficult to remove, but no special tools are needed. You may want to have some Pblaster penetrating oil on hand in case you come across one that needs a little help letting go.

He may have been referring to the crappy 2-piece plugs Ford was using in the early 3rd gens, which were prone to snap in half during removal. A special tool is then required to remove any that break. Ford changed the plugs to a 1-piece sometime in 2008 though, so it's a non-issue for a 2010.
 

scythefwd

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I just changed mien in my 2010 .. they're not bad. Cylinder 8 is the hardest to get to.. but it wasn't bad at all. Ford's engineers are idiots though, they could have reoriented the cop's 180 degrees and made it a LOT easier to change lol.

The breaking ones with special tools are for the pre-2008 revision heads.. the single piece sp-509's come out just fine. Mine stuck pretty good, I was afraid I was goign to split my socket out.. but they all came out in one piece.
 
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