Can spark plugs be re-gapped?
I was in pinch and didn't have a gap gage with me when I changed my spark plugs, so I just kinda eye balled both plugs and tried to get the gaps in the new ones as close as I could to the old ones.
I finally got a gap gage and still had the old plugs around. Turns out the old plugs (factory plugs)
were gapped wrong. I have a ford 4.6l that calls for 0.055 inches, and most of the factory plugs are anywhere from 0.060 to 0.070, I think one was even at 0.090.
To finally ask my question, can these spark plugs be re-gapped?
Use a pair of needle nose and pull the pin back out, then go spend 3.99 on a gap tool and do it correctly.
Yes of course they can gap them to spec an they will be ok
Yes, of course, if the gap is too big, tap them on a metal object, if its too small.wiggle the feeler gauge in until it slides thru the gap easily but don't widen. Ya… Bottom line… Anytime, you buy plugs, ALWAYS check the gap before installing! Hmm you learnt something today… Lol
Hi if the coil which produces the spark is really that bad it should be replaced. A spark plug gap is not that critical. It however shows that something is not as it should be with the ignition system if the spark does not ionise a gap of up to 0.100 ".
Yes. Spark plugs fit a variety of vehicles, each having it's own gap tolerances. Mine is.035. Do it right and you won't break the plug. Do it wrong and you need a new plug. Basically it is taping the tang on the concrete floor or a rock… To close the gap. Or needle nose pliers on the tang to widen the gap.
DO NOT USE THE FEELER GAUGE TO WIDEN THE GAP. (That is like using a micrometer to hammer in a nail. Measuring tools measure. You got other tools to adjust the plug.
NOTE: As you wear out a spark plug, the gap gets wider(and all these were wider, meaning normal expectations)
My f150 factory plugs were gapped at.070. Why did Ford not follow their own specifications?
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