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Should I be concerned about the coloration of these spark plugs? (lemmy.zip)
submitted 6 months ago by to c/mechanicadvice@lemmy.world
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Bought this car second hand, they apparently put iridium spark plugs in, but i want to know if I should be concerned with the buildup and rusty appearance it's developed. For all I know this spark plug could be from 10 years ago.

Do I need to replace the plugs, and is that actually rust? Does this mean I have an issue with my head gasket?

Edit: Thanks guys! I'll be ordering some new plugs soon.

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[–] 5 points 6 months ago* (1 child)

Gap might not be that bad, most modern ignition systems run gaps of 60-80thou. Hotter longer spark gets a better flame front for more complete combustion, which they design in for fuel eco, and modern coils have high enough spark energy that jumping the gap is not an issue.

Unless OP is having a drivability issue I'd brush them off with a nylon brush and send it.

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