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Old 05-08-2012, 09:29 AM   #1
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Question changing spark plugs

sure we're in the era of "leave 'em in forever" platinum/kryptonite spark plugs....

still....it's hard to evolve away from the spark plug/rotor/condenser every Xtens of thousand miles of my youth....

What's the most common JK plug replacement mileage and what plugs give the best results?.....assuming there are any JKs on the planet with enough miles on them to 'need' plugs....

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Old 05-08-2012, 09:33 AM   #2
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I read the plugs used are good for 100k
But still plan on a change nearing 50k

Asking about spark plugs is like asking what oil to use. This might get interesting.

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Old 05-08-2012, 09:34 AM   #3
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I've never heard of "leave them in forever"

I just changed mine with 50K on the clock cause it was misfiring. I have heard anywhere between 50K-75K can warrant new plugs unless you get issues prior, like me. In my case changing the plugs fixed the misfire. If it didn't I would have done the plug wires and/or the distibutor/coil packs, whatever these Jeeps have.

Also stick with the stock champion plugs or just some regular platinum. The JK doen't like the fancy plugs.

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Old 05-08-2012, 01:52 PM   #4
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^Agreed. I also changed mine at 50k.
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Old 05-08-2012, 02:48 PM   #5
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my Chevy p\u i changed the plugs at 100k, i only changed them 4x. wifes pontiac, i pulled one on it last summer 88k, still looks new, i'll change them at 100k
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Old 05-08-2012, 02:50 PM   #6
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At least take them out for inspection and a coating of anti seize. There have been many reports of improper gaps.
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Old 05-08-2012, 02:51 PM   #7
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Quote:
Originally Posted by daggo66
At least take them out for inspection and a coating of anti seize. There have been many reports of improper gaps.
I agree but if one were to take out, why not just replace ?
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Old 05-08-2012, 03:32 PM   #8
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Quote:
Originally Posted by kjeeper10 View Post
I agree but if one were to take out, why not just replace ?
i took one out because it had a bad coil,, i wanted to check the plug to make sure it was not fouled,,, no spark, no fuel, no foul
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Old 05-08-2012, 06:57 PM   #9
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Quote:
Originally Posted by kjeeper10 View Post
I agree but if one were to take out, why not just replace ?
Exactly why I replaced mine.
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Old 05-08-2012, 07:55 PM   #10
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I replaced mine a 62000. Nothing was wrong but I bought it used and I usually do a quick change when I buy a used car. The old ones looked ok and the gaps were fine. I replaced them with the Champion plugs that were recommended.

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