Considering spark plugs, but not for the reason most would consider

General "Gas Engine" questions that do not fall into the sub-categories of topic heading.
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OnlyinaChevy
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Considering spark plugs, but not for the reason most would consider

Post by OnlyinaChevy » Wed Oct 17, 2018 10:43 pm

At 100k I decided it was time to change the spark plugs in my GM truck. I'm fairly certain that GM suggests that you change plugs at 100k regardless of the model. I own a 2009 Silverado, 5.3l. Mods are only a K & N CAI "metal tube" and dual exhausts, but I don't think either of those should have too much affect on the mileage suggestion by GM especially since my truck seems to run just fine with AC Delco plugs that I used for my plug replacement.

All that being said, if I decided to do another spark plug swap, does anyone have a good suggestion on a spark plug that might be more efficient with my truck, even with the small amount of mods that have been done to the engine. I should mention that my truck, even with 35" tires, gets 13 mpg of combined fuel economy.

On a side note, when I did the first swap, I changed out the wires, but just used Autozone's brand wires....so that might be something to consider in lieu of plugs.
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ASTE25
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Re: Considering spark plugs, but not for the reason most would consider

Post by ASTE25 » Thu Oct 18, 2018 2:53 am

Stay stock.
Jordan

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ProfBrown
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Re: Considering spark plugs, but not for the reason most would consider

Post by ProfBrown » Thu Oct 18, 2018 12:30 pm

Stay stock for sure. Those mods don't change the characteristics enough to justify a different plug. You'd likely run worse or get less MPG out of her with a different kind of plug. At least stay with the same spec, different brands is a point of contention with many saying stay AC Delco. I am using champion plugs and the truck is running just fine. I have a 34.4 inch tire and I average 15 mpg with the roads I drive. About to go up since IM taking a trip to Arizona on the nice and flat roads.
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Re: Considering spark plugs, but not for the reason most would consider

Post by CritterSnicker » Thu Oct 18, 2018 12:53 pm

As others indicated, stay with stock AcDelcos. The standard for your truck is already an iridium tipped plug which has much better characteristics than the old platinum counterparts.

Prepare for a good time removing the spark plug against the firewall on the passenger side bank. :P
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Re: Considering spark plugs, but not for the reason most would consider

Post by S&H (NotGreenStamps) » Thu Oct 18, 2018 4:07 pm

Don't use any, saves gas and helps keep the air clean.

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OnlyinaChevy
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Re: Considering spark plugs, but not for the reason most would consider

Post by OnlyinaChevy » Thu Oct 18, 2018 7:55 pm

CritterSnicker wrote:
Thu Oct 18, 2018 12:53 pm
As others indicated, stay with stock AcDelcos. The standard for your truck is already an iridium tipped plug which has much better characteristics than the old platinum counterparts.

Prepare for a good time removing the spark plug against the firewall on the passenger side bank. :P
Last time I did my spark plug change, it took me about an hour....maybe less.

***Point of interest.....body lift lifts the engine away from the body. Just sayin.
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Re: Considering spark plugs, but not for the reason most would consider

Post by CritterSnicker » Fri Oct 19, 2018 8:16 am

Yeah, the body lift would certainly help. I remember it being the body/header that was in the way of that last PITA spark plug against the firewall.
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OnlyinaChevy
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Re: Considering spark plugs, but not for the reason most would consider

Post by OnlyinaChevy » Fri Oct 19, 2018 12:09 pm

When I say it took me "an hour....maybe less", that was for all eight.
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Re: Considering spark plugs, but not for the reason most would consider

Post by CritterSnicker » Fri Oct 19, 2018 1:38 pm

"Took me an hour, maybe less"..... with a 6ft stepladder! :P

Did you use dielectric grease on the spark plug boot to plug connections?
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Re: Considering spark plugs, but not for the reason most would consider

Post by ProfBrown » Sun Oct 21, 2018 9:19 pm

I did this and it took me about an hour for all 8. I did plugs and wires, of course using dielectric grease is recommended, makes the next time you do it an easier job. The passenger side bank on the NNBS isn't too bad to get to if memory serves. Simply use a medium sized 3/8ths ratchet and whatever the socket size is. No extension. I had my knees on the top of the core support and my right arm on the head to hold me up. Came right out. This is a little easier if you are younger I would suppose lol.
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