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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
2016 Outback 2.5 Limited 56k-M1 EP 0w20 $2/qt

#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.

#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)
13 elantra 68k 5w30 QSUD
03 chevy avalanche76k synpwr 10w30
01 saturnsc1 185k synpwr rebuilt
17 mazda cx-5 3900 miles m1 0w20/0w40 mix

#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.
15 Jeep KL Limited V6: Formula Shell 5W20
07 LR3 SE V8: Maxlife 5W30
05 Jeep KJ Limited: PHM 5W30
96 Jeep XJ Country: STP HM 5W30 (winter)

#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.

#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 ??
2013 Malibu 2LT PG 0w20
2013 Accord Sport PG 0w20

#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.
2011 F150 4x4 5.0L
1996 Mustang GT 5spd/ragtop

#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.

#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.

#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,
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.
ASE L1, Master. Deutsch Meisterbrief.

#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.

#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.
Without data you're just another person with an opinion. W. E. Deming

2003 Corolla 250,000 miles
2004 Rav4 359,000 miles
2015 Camry 59,000 miles

#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!

#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.
2012 Hyundai Santa Fe, 125,000 miles, Supertech Full Syn high mileage 5W-30, Auto7 Filter.
2014 Kia Rio, 80,000 miles, Havoline Pro DS Syn 5W-30, WIX Filter

#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:

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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