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Spark Plugs - To gap or not to gap?

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Old May 10, 2009, 03:35 PM
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Spark Plugs - To gap or not to gap?

Looking to purchase some plugs for my Evo VIII. I want to go with stock replacement plugs.

So here's the confusion.. Apparently you're not supposed to gap these plugs..

The service manual says this:



and the NGK website says this:



Can I just buy those plugs and install or do I try and cutting down the gap because it's at .032 and the manual says max is .031 ??

Thanks

Last edited by tawheed; May 10, 2009 at 03:40 PM.
Old May 10, 2009, 05:00 PM
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gap them at .24
Old May 10, 2009, 05:05 PM
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I think you meant .024

Using the irridiums be sure to use feeler gauges to check the gap and not a gapper tool as this could damage the tip.

They say they are supposed to be pre gapped but I trust no one
Old May 10, 2009, 06:04 PM
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I have minimal mod ( catback and drop-in filter) and mine are gapped .026 without any issues.
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