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Discussion Starter · #1 ·
Looking for reassurance, as I'm repairing my 2008 Smart, (crankshaft sensor replacement and more) I discovered a intermittent coil on one of my cylinders. Decided to install new plugs with the new coil replacement. The performance NGK have a longer threaded reach than the stock size Bosch plugs I installed years ago. So, my question is..... Are performance plugs a tad longer than standard Spark Plugs?

62701
 

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As far as I'm aware you should stick to the same length. I do not think those are correct replacements if they are different as shown...

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Discussion Starter · #4 ·
The shorter plug was the standard size back when they were first sold.... the high performance plugs are longer from my quick research in the last hour... Even the evilution page shows the longer threads...
 

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Discussion Starter · #6 ·
Look on either the NGK Canada web site or Rock Auto for plug info...


I had the correct info from several sites, but since the plugs I pulled were shorter, it had me second guessing myself on these replacements. Thanks,
 

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I went to the Bosch Auto Parts site, looked the model up, and they have a picture of a longer plug, surprisingly. But I have seen such long plugs around this board in the past....

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