i have 106k on my 08, it runs great. I was thinking about changing the plugs Im just dreading one breaking off.... what is everyone else doing in this area? running them till there's a issue or changing them b4 that happens? thanks!
change the spark plugs or no??
- Thread starter Buttz
- Start date
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ManUpOrShutUp
Full Access Members
Change them before there's an issue. Bad plugs are the most common cause of dead coils. One coil costs as much as a set of 8 plugs.
Do you know the build date of your Expedition? If built on or after 10/9/07 you have a one-piece plug.
Do you know the build date of your Expedition? If built on or after 10/9/07 you have a one-piece plug.
cootersEL
Active Member
All 8
I waited until nearly 117K and broke all 8. I suppose each plug that breaks is a greater risk, so I wouldn't push it. Especially if you're not keeping the truck past the next plug change.
I'll also add that I was dreading it, looking for the best method (followed the TSB, but also used a light impact, and switched it to PB Blaster on the other side - none of this mattered), and actually using the tool was so easy I wish I hadn't wasted so much time trying to figure out the best method to get them out without breaking them.
Be sure when they break, they break off flush, and I wouldn't push the ceramic as far as recommended. I lost a strap in one cylinder and a piece of ceramic in the other, but whenever I left about 1/16" from bottoming the pusher I only broke one side of the ground strap and didn't lose any pieces. Pieces aren't good.
Regards,
******
I waited until nearly 117K and broke all 8. I suppose each plug that breaks is a greater risk, so I wouldn't push it. Especially if you're not keeping the truck past the next plug change.
I'll also add that I was dreading it, looking for the best method (followed the TSB, but also used a light impact, and switched it to PB Blaster on the other side - none of this mattered), and actually using the tool was so easy I wish I hadn't wasted so much time trying to figure out the best method to get them out without breaking them.
Be sure when they break, they break off flush, and I wouldn't push the ceramic as far as recommended. I lost a strap in one cylinder and a piece of ceramic in the other, but whenever I left about 1/16" from bottoming the pusher I only broke one side of the ground strap and didn't lose any pieces. Pieces aren't good.
Regards,
******
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Yes just do it. In fact you're beyond what most Ex owners consider "late" worrying about hem breaking.
They're like $8/each. What's the issue?
Bro one motorcraft SP-515 plug is the same price as 6 platinum NGK's for my wife's car, **** never seen more expensive spark plugs in my life.
ManUpOrShutUp
Full Access Members
They're ~$9 each at both Amazon and Rock Auto. That's a bit pricey for what they are, but they're not even close to the most expensive plug out there. Regardless, the SP-509 is the recommended plug for an '08 Expedition and those are ~$8 each.
When I replaced mine at around 105,000 miles I began to add SEAFOAM & GUMOUT internal engine/injector cleaners every time I filled up. About once a week. The idea is that the cleaners SHOULD help by breaking up & softening hard carbon deposits on the plugs. I feel it really can't hurt and I changed the oil right after the plugs anyway.
Of eight only three broke. I had purchased the extractor tool from NAPA before hand for something like $70.00
It wasn't terribly bad. Removed all the coils and other stuff in the way one day & did the plugs the next & put everything back together. If I didn't have the health issues I do it would have taken me a lot less time...maybe three hours or so.
Of eight only three broke. I had purchased the extractor tool from NAPA before hand for something like $70.00
It wasn't terribly bad. Removed all the coils and other stuff in the way one day & did the plugs the next & put everything back together. If I didn't have the health issues I do it would have taken me a lot less time...maybe three hours or so.
