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Old 05-06-2008, 07:56 PM
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Need help Changing Spark Plugs!!!

I am currently at 40,000. Not sure if changing them now would improve fuel economy much. I own a 2.5s 2006 altima.

How difficult is it to change spark plugs? Where are they located. I can't seem to find them


Last edited by goldenlight; 05-06-2008 at 08:20 PM.
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Old 05-06-2008, 08:15 PM
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If you have a 3.5, you have platinum plugs, and you do not have to change them until 100K...

When you are ready to change them (3.5) - you had better do some reading, or get some help - the rear bank is a real bitch to get at (you have to remove the intake manifild, among other things).

Read this...

Then read this...

Not sure if the QR25DE has platinums...
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Old 05-06-2008, 09:13 PM
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2.5 calls for a replacement at 100k with i think iridium plugs. I would assume platinums would work just as well. I just forked out 50 bucks on a set of plugs.
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Old 05-06-2008, 09:19 PM
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Changing plugs on a 2.5 will be real easy. I thought before clicking on your thread that you had a 3.5. Not as easy on the 3.5.. I think Nissan says you never have to change your plugs. But since its easy to do on the 2.5 it can't hurt nothing.
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Old 05-06-2008, 09:33 PM
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I want to increase my fuel economy.. Will this help.. Or can I make things worse.
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Old 05-07-2008, 12:35 AM
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i dont have the four i have the six, but to answer your question the spark plugs should be under the coil packs on the valve cover. at only 40k miles it probably wont make a difference if you have the platinum plugs. if you have the vpower you might want to change them. just change your air filter and keep your tires inflated properly.
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Old 05-07-2008, 01:55 AM
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The stock plugs on the 2.5 are located under the individual coil packs, and are really easy to change. OEM plug is an NGK platinum design. I pulled the ones in my '04 @50k, and there was no wear on them at all. I had new ones to compare them. I'd go with the factory change interval @ 100k.
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Old 05-07-2008, 01:52 PM
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If you can't find the spark plugs on the QR, maybe you shouldn't be trying to replace them yourself.
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