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Old 09-11-2005, 03:49 PM   #1
left footed whooten
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Default Cleaning spark plugs

Ive got a set of those iridium plugs from NDenso. Ive put probably 18-20K on them, and was wondering what the best way to clean them up was, since they are supposed to last so long? they are normally wearing, nothing looks out of place, but i figured they may need a cleaning since regular plugs get changed at shorter intervals than the iridiums.
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Old 09-11-2005, 03:54 PM   #2
Danny Boy
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I don't think you need to clean them.

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Old 09-11-2005, 07:00 PM   #3
cjfike
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You can check and re-gap them if they need it. Just becareful. I agree with DB, you shouldn't need to clean them. Unless they are coated with tar-sludge because your car burns oil. But then spark plugs would be the least of it.
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Old 09-11-2005, 09:06 PM   #4
FalconRS
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Perhaps some throttlebody cleaner or something along those lines to break up carbon. But like is said above, shouldn't be necessary. If they're that dirty you have other problems. Check the gap and you're good to go.
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Old 09-12-2005, 02:34 AM   #5
Chi_San
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Um, easiest way to clean them? Do a seafoam treatment.
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Old 09-12-2005, 03:10 AM   #6
00Maddog
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find a long hill, floor it all the way up. the plugs are now clean
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Old 09-12-2005, 03:15 AM   #7
specialev
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When I have them out I don't use anything more than some laquer thinner and a microfiber rag to clean them.
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Old 09-12-2005, 04:23 AM   #8
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Quote:
Originally Posted by 00Maddog
find a long hill, floor it all the way up. the plugs are now clean
That's actually how I found out mine were bad. Going up a hill at WOT in 3rd for about 3 miles, then a CEL came on. Misfire in #1. Replaced plugs, no more CEL, runs better, better power, no more issues.
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Old 09-12-2005, 10:40 AM   #9
sha_zapple
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Some plugs cant be regapped, and arnt supposed to be cleaned. If not, then you can use a wire brush to get the gunk (if any) off.
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Old 09-12-2005, 10:52 AM   #10
kaisersouse
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yah wire brush FTW
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Old 09-12-2005, 01:23 PM   #11
00Maddog
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isn't the iridium just a thin coating? sounds risky brushing it.
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Old 09-12-2005, 01:53 PM   #12
Hayes
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Never wire brush a spark plug. You end up with microscopic iron on the insulator which will cause misfires. If you feel you must clean I'd use a sand blast pencil unit with a non-conductive medium like glass shot. I can't understand why you would need to clean that type of spark plug unless it's oil fouled and then use a strong solvent.
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Old 09-12-2005, 01:58 PM   #13
00Maddog
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Quote:
Originally Posted by Hayes
I can't understand why you would need to clean that type of spark plug

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