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Discussion Starter #1
Saturday I changed out my spark plug and this is what they looked like after 89K. I installed another set of NGK Iridium spark plugs. The whole prossess took me about an hour to do, very easy. I also changed my air filter with another Amsoil Ea104
 

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how did she feel after the switch?
 

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I changed mine at 60K. Cylinder head threads and spark plug threads have a habit of welding themselves together and I figured after 4 years it was time to replace them no mater how many miles I had. I was glad I did. The plugs were more worn than I expected.
 
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Changed mine at 97,000 and they looked a lot better than those plugs AA...Looked as though some of the electrodes were burned completely out.
You running diesel again? LOL
 

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Discussion Starter #7
truck seems to run a little better even show an improved gas milage
here in SC they sell cheap gas here so I run seafoam time to time
 

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Yeah, I'm about due now as well. The truck has 90,500 miles atm. Thanks for posting the pic to give us an idea of what to expect.
 

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truck seems to run a little better even show an improved gas milage
here in SC they sell cheap gas here so I run seafoam time to time
I've never had a problem with "cheap" gas here.

Fuel I've bought in NC and Tennessee has actually been worse quality.

Remember not to buy from places like Walmart, Murphy USA, Costco, etc.
 

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They don't look to bad, and it doesnt hurt to change them early. I did mine last year at 69K and am now at 72K and it feels alot stronger. Mine looked just like yours. People around here weren't lying when they said it was a 1 hour job. It was to easy.
 

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Im going to just do mine at 50K, it might seem like over kill, but everything 50K is not a big deal to me and it doesn't cost that much anyways.
 
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Im going to just do mine at 50K, it might seem like over kill, but everything 50K is not a big deal to me and it doesn't cost that much anyways.
I agree with you on that one. It won't kill your truck to do it early. Just consider it some extra TLC.
 

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Well, after a 40 minute, first thing in the morning, spark plug service in my own driveway, I found that all but one OEM plug was nice and golden brown... The furthest front driver's side plug was a little blackened, lot less than the OP's though... I believe the OEM NGK's are scheduled in the maintenance schedule at 100k, and mine looked like they could've prob made that minus the one... My only recommendation is to use a double short locking extension due to the restrictive rear two plugs on both sides... Oh yeah, my wheel wells are mostly open since I just have rubber drapes inside them and did the entire swap through the wheel well since I am lifted... Saved me from having to climb up and into my engine bay... So, for those who are lifted, recommend you just pull your fender liners to easily access all spark plugs... 10mm socket, 5/8" spark plug puller, and two short extensions... start from front to rear and BOO-YAH! within an hour, you're done!
 

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Im going to just do mine at 50K, it might seem like over kill, but everything 50K is not a big deal to me and it doesn't cost that much anyways.
I changed mine at 60K. Cylinder head threads and spark plug threads have a habit of welding themselves together and I figured after 4 years it was time to replace them no mater how many miles I had. I was glad I did. The plugs were more worn than I expected.

Humm, maybe I should change mine.... 2006 but only 28k miles.

Think I might check them when I install the intake this week.
 

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Discussion Starter #15
I ordered my NGK's from Amsoil for under $9 each. I see some places charge $21 a piece. All my plugs came out nice and easy, the new ones went right in and torqued to 18 ft lbs or 216 inch lbs
 

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Humm, maybe I should change mine.... 2006 but only 28k miles.

Think I might check them when I install the intake this week.
no need to worry with only 28k... if you were at 60k, I'd say check them, otherwise you need not worry unless you've been feeding it low octane fuel all of it's life...
 

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Humm, maybe I should change mine.... 2006 but only 28k miles.

Think I might check them when I install the intake this week.
IMHO, change them. It's not the miles it's the years. $1000 aluminum heads will sometimes sacrifice themselves to save a $4 steel thread spark plug.
 

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Man, I wasn't expecting the plugs to look that bad at 80k miles. I recently changed the plugs in my boat much later than I should have and they didn't look half that bad.
 

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IMHO, change them. It's not the miles it's the years. $1000 aluminum heads will sometimes sacrifice themselves to save a $4 steel thread spark plug.
You have a good point... I drive mine just about every day and only use 91 octane gas, so I could see corrosion due to lack of use...
 

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Discussion Starter #20
so its the gas? maybe need to go 89 octain?
 
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