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Old 01-22-2011   #1
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Default 2004 - 2007 F-150 Spark Plugs

The original 2004-2007 F-150 5.4L spark plug is the SP-507. This spark plug was replaced with the SP-515, supposedly to help the seizing/breakage problem the SP-507
has. I bought one of each part number, just to see if I could see a difference in them. Both plugs appear to be 3 piece, with the threaded hex nut welded to the lower GND
shield that extends into the combustion chamber. The only difference I saw was the GND shield is slightly shorter on the SP-515, as can be seen in photo #6:


1
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5
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6
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7
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8
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Old 01-22-2011   #2
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hopefully they work because i got the 515s LOL
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Old 01-22-2011   #3
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hopefully they work because i got the 515s LOL
Hopefully they used the Nickel anti-seize on the GND shield when they
installed them. I'm sure I will use the SP-515's when I replace mine...
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Old 01-22-2011   #4
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yup they told me they used the nickel anti-sieze
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Old 01-22-2011   #5
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Great info and photos Bob! Thanks a bunch!
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Old 01-22-2011   #6
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Great info and photos Bob! Thanks a bunch!

Thank you Kevin!!
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Old 01-22-2011   #7
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Yes thank you for posting these pics,& all the great info.....Robert
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Old 01-22-2011   #8
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Yes thank you for posting these pics,& all the great info.....Robert

Thank you Robert!
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Old 01-22-2011   #9
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Well shucks, I wish I had known this 2 weeks ago before I replaced mine. Thanks for the info Bob
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Old 01-22-2011   #10
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Sure not much difference.
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