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#4490498 - 08/16/17 07:58 PM Put anti-sieze on NGK plugs
RedOakRanch Offline


Registered: 11/10/13
Posts: 846
Loc: Central Coast California
Changed the plugs on a 94 Crown Vic, out of habit I put a light coat of anti-sieze on. As soon as I finished I realized what I've done. So at this point should I replace them with steel plugs, retorque them once in a while or clean them and put them back? Real experience and speculation is welcome.
_________________________
1994 Ford Crown Vic 206k-Frankenbrew 0w20,30,40!
2005 Chevy 1500 Crewcab 4X4 178k-BC 0w30 $2/qt
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#4490505 - 08/16/17 08:02 PM Re: Put anti-sieze on NGK plugs [Re: RedOakRanch]
SatinSilver Offline


Registered: 01/24/08
Posts: 10172
Loc: OH
Take them out and clean the threads with some Brake Cleaner. But spray a rag with the cleaner and wipe the plugs dry. Let air dry for a while as well. Reinstall.

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#4490511 - 08/16/17 08:07 PM Re: Put anti-sieze on NGK plugs [Re: RedOakRanch]
spasm3 Offline


Registered: 05/30/10
Posts: 8662
Loc: North Carolina
I would not worry about it. I use it on every plug even if the plug mfg recommends not to. Hand tighten ( not too much in al heads with anti-seize). Never had a problem.

If you try and clean it, and any gets on the porcelain around the tip, it will misfire like crazy.


Edited by spasm3 (08/16/17 08:08 PM)
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#4490517 - 08/16/17 08:11 PM Re: Put anti-sieze on NGK plugs [Re: RedOakRanch]
HoosierJeeper Offline


Registered: 11/23/16
Posts: 1276
Loc: WI
Tomorrow I'm pulling some NGKs out of my Liberty that I had installed with antiseize a few years back....we shall see. I'll post up my results.
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#4490520 - 08/16/17 08:14 PM Re: Put anti-sieze on NGK plugs [Re: RedOakRanch]
AVB Offline


Registered: 05/20/12
Posts: 1283
Loc: Georgia
It is not going to hurt anything.

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#4490529 - 08/16/17 08:25 PM Re: Put anti-sieze on NGK plugs [Re: RedOakRanch]
Ram02 Offline


Registered: 05/13/17
Posts: 131
Loc: New York Queens
NGK doesn't recommend anti seize on there plugs ??
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#4490531 - 08/16/17 08:27 PM Re: Put anti-sieze on NGK plugs [Re: RedOakRanch]
buck91 Offline


Registered: 04/17/12
Posts: 2449
Loc: West Michigan
I've always installed plugs in my modular V8's with a light coat of anti seize and never had an issue. Plus they are easy to remove later! I know that I may be in the minority on this application, though.
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#4490537 - 08/16/17 08:29 PM Re: Put anti-sieze on NGK plugs [Re: RedOakRanch]
DB_Cooper Offline


Registered: 10/01/07
Posts: 401
Loc: Ga
+2..don't worry about it. FWIW..I use a drop or two of engine oil on the threads of new spark plugs when installing..usually NGKs. Never an issue. Anti-seize seems to get everywhere and make a mess. NGK may be worried about over-torquing the plugs or maybe A-S getting on the business end of the spark plug and causing problems.

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#4490542 - 08/16/17 08:33 PM Re: Put anti-sieze on NGK plugs [Re: RedOakRanch]
AVB Offline


Registered: 05/20/12
Posts: 1283
Loc: Georgia
I put just a small dab on all spark plugs. I don't worry about brushing it on, I let the threads distribute it.

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#4490565 - 08/16/17 09:02 PM Re: Put anti-sieze on NGK plugs [Re: RedOakRanch]
Trav Offline


Registered: 11/20/06
Posts: 18893
Loc: MA, Mittelfranken.de
I have used never seize on every single plug I have changed since 1971 and never had a single issue. Working in the trade I have done a lot of plugs in all those years, probably more than most people will do in a lifetime.
Just a little on the threads will do fine, reduce torque by 25% of you use a torque wrench, don't lather it on, Sleep well no harm done, leave them alone and forget it.

The real skinny on NGK's no use policy is legal, if you use too much and get it on the electrodes you can cause a misfire, with Federal emissions warranty the legal implications for them would be enormous.
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#4490575 - 08/16/17 09:10 PM Re: Put anti-sieze on NGK plugs [Re: RedOakRanch]
Number_35 Offline


Registered: 07/07/14
Posts: 818
Loc: Winnipeg MB CA
I always use NGK plugs, and always add a wee bit of anti-seize. I've never had a problem. By way of contrast, I've run into seized-in factory plugs (admittedly not NGK) on friends' vehicles. This likely wasn't a problem in the leaded-gas days when the debate was whether to change plugs twice a year or every 10K miles. Now with a set of plugs good for 10 years or more, they can seize in badly.

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#4490596 - 08/16/17 09:46 PM Re: Put anti-sieze on NGK plugs [Re: RedOakRanch]
Leo99 Offline


Registered: 03/30/14
Posts: 3050
Loc: NJ
The issue is over torquing them as the anti seize acts as a lubricant. If you didn't gorilla them in, it's fine as is.
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#4490599 - 08/16/17 09:50 PM Re: Put anti-sieze on NGK plugs [Re: RedOakRanch]
i_hate_autofraud Offline


Registered: 05/19/16
Posts: 705
Loc: Canada
Knowing that plugs stay in engines way longer then the old days,
I put anti-sieze on all plugs I work on, years later you won't strip
threads taking them out!

Never use drops of oil instead of anti-seize, the oil burns and bakes the plugs
into the threads and require more effort to remove a few years later!

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#4490600 - 08/16/17 09:51 PM Re: Put anti-sieze on NGK plugs [Re: RedOakRanch]
Urshurak776 Offline


Registered: 08/21/12
Posts: 445
Loc: North Carolina
I have always added a real small amount and torqued to bottom of specified range. Never had an issue.
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2012 Hyundai Santa Fe, 125,000 miles, Supertech Full Syn high mileage 5W-30, Auto7 Filter.
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#4490609 - 08/16/17 10:13 PM Re: Put anti-sieze on NGK plugs [Re: RedOakRanch]
doitmyself Offline


Registered: 06/03/02
Posts: 6220
Loc: MI
The reasons I have seen on the interweb over the decades to not use antiseize are:
- Could result in over torque and breakage of threads or plugs
- Over use "might" affect heat and/or electrical conductance
- Over use might result in contamination of the electrodes and misfires

Here is an older NGK technical publication recommending no antiseize on "plated" plugs, but o.k.'s its use on plain steel, non plated plugs: https://www.ngkplugpro.ca/content/contentfiles/pdf/NGKSP-0907-1R-Anti-SeizeonSparkPlugs.pdf

Champion makes an aviation antiseize for airplane plugs.

Draw your own conclusions. Mine are that it is fine to use it sparingly and heed the cautions mentioned.

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