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01-21-2018, 08:05 PM | #1 |
Drives: 2008 and 2012 Yaris 2dr Join Date: Oct 2009
Location: NW WI
Posts: 17
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Anti-seize on spark plugs?
On another forum there was a discussion about whether or not to put anti-seize on the spark plug threads when replacing them.
I have 2 Yaris' and have replaced the plugs once on the 2012 and three times on the 2008 and have never put anything on the threads and have never had any problems (seizing or stripping the threads). I've used Iridium plugs of different manufacturers (can't remember the brands). Most comments on the other forum was that most people do put something on the threads. Anyone want to comment on this and share your experiences? I might add, the plugs have always been changed at about 120k intervals and have never been removed in between those intervals. Last edited by vwhugger; 03-26-2018 at 08:32 PM. Reason: added something |
01-21-2018, 08:22 PM | #2 |
Drives: 2015Yaris, Son's car, 10 Prius Join Date: May 2010
Location: Texas
Posts: 182
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If you use NGK plugs, they say NO. They have plated the threads. http://www.ngksparkplugs.com/about-n...ut-spark-plugs
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01-21-2018, 09:21 PM | #3 |
Drives: 2009 Base Hatch 2 Dr Auto Join Date: Dec 2008
Location: nj
Posts: 4,790
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In my experience if you leave the original plugs in for 120,000 miles when you go to take them out they will be stuck. So I use anti-seize to prevent that
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01-21-2018, 10:33 PM | #4 |
Drives: '08 2zr swapped Vios M/T Join Date: Oct 2012
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Anti seize all the time. I plating or coating that companies use in my experience doesn't work well at all. At the end of the day the owner of the one who is sol if they seize not the company.
You don't need to use a lot just a little goes a long way
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01-21-2018, 11:38 PM | #5 |
Drives: Yaris 06 - 5dr hatchback Join Date: Aug 2015
Location: Birmingham, UK
Posts: 390
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Mine has regular copper core Denso plugs. I change them every 20,000 miles. I never bother. Normally just put a tiny toot of WD40 down when I break them loose. Then wipe the residue away with a rag before i put the new ones in. I find a bit of carbon builds up on the threads and they are very... dry. But i don't bother with anti seize. Never had an issue.
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01-22-2018, 05:18 AM | #6 |
Drives: 2015Yaris, Son's car, 10 Prius Join Date: May 2010
Location: Texas
Posts: 182
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My experience is that NGK make excellent plugs and believe they know what they are talking about. Over-torquing could be a disaster as anti-seize changes the whole dynamic for torque specs.
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01-22-2018, 07:35 AM | #7 |
I respect the manufacturer recommendation. NGK says no anti-seize.
Never had a problem. But I can imagine someone may have different experience. |
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01-22-2018, 09:05 AM | #8 |
Drives: 2009 Base Hatch 2 Dr Auto Join Date: Dec 2008
Location: nj
Posts: 4,790
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If you take the plugs out regularly say every 20,000 miles and reinstall them after gapping and checking them, you probably won’t have a problem. Of course the plugs will usually last 120,000 miles (usually) but if you want to change them at $40 a pop that’s your call. That’s for iridium plugs. But I would bet the two dollar plugs would also last 120,000 miles. No lead in gasoline and fuel injection will see to that.
My advice is take The originals out at 20,000 miles and anti-seize them lightly and reinstall and leave them there till you change them at 120 K. It’s true the anti-seize will change the torque value the plug sees if you use a torque wrench so I go by feel.
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01-22-2018, 11:09 AM | #9 | |
Drives: 2009 Yaris 4 door hatch Join Date: Dec 2008
Location: Frederick, MD
Posts: 30
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Quote:
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01-22-2018, 12:28 PM | #10 |
Drives: 2009 Base Hatch 2 Dr Auto Join Date: Dec 2008
Location: nj
Posts: 4,790
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I agree!
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01-22-2018, 12:37 PM | #11 | |
Drives: '08 2zr swapped Vios M/T Join Date: Oct 2012
Location: Caledonia Ont.
Posts: 2,938
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Quote:
Yes anti seize changes torque specs. However, corrosion and various metal wear and tear does as well so technically unless you are torquing a new nut in a new bolt the torque will never be the same as what the factory recommends so it becomes a moot point that always gets thrown around. Try this with never antiseized lug nuts/bolts and you'll see what I mean. You hit the 76ft/lbs way too early then a brand new or anti seized set up. I never actually use my torque wrench for plugs so I always lightly anti seize them and hand snug them down. I typically will pull iridium's after every summer season to check how they look
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No one ever wants to give a Yaris the point by... Last edited by tmontague; 01-22-2018 at 03:06 PM. |
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01-22-2018, 02:45 PM | #12 |
Drives: 07 Yaris Hatch Join Date: Aug 2017
Location: UT
Posts: 50
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The reason NGK and Motorcraft (and probably other manufacturers) have recommended no anti-seize is that effects the torque values, as mentioned. Over-torquing is bad in aluminum heads.
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01-23-2018, 11:16 AM | #13 |
Drives: 2009 yaris 2 door Join Date: Feb 2013
Location: richmond TX.
Posts: 232
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anti-sieze
Using anti-sieze does not change the torque value. It might make the threads go a little farther in because of the lubrication. 10 foot pounds is still 10 foot pounds.
example; if you torque a nut to 10 foot pounds and it stops at 12 oclock on the scale, if you lube the threads and torque the exact same nut then it will stop at around 2 oclock on the scale, but it's still 10 foot pounds. It's minimal difference I've used a little anti-sieze since day one with no issues. |
01-23-2018, 04:56 PM | #14 | |
Drives: 2015Yaris, Son's car, 10 Prius Join Date: May 2010
Location: Texas
Posts: 182
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Quote:
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01-23-2018, 05:10 PM | #15 |
Obsessed with 1.5L
Drives: '10 PW Yaris Sedan Join Date: Feb 2011
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I anti-seize everything that has threads. Including spark plugs. Dont need much on them since tbey really do not see any outside elements. I do it on spark plugs more for not tearing up the threads
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01-23-2018, 09:44 PM | #16 | |
Drives: 2007 yaris 3 door Join Date: Sep 2015
Location: Denver, Colorado
Posts: 1,000
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Quote:
on the anti-seize: the main reason i believe they don't want you using anti-seize is that people slop it all over and it can short out the electrode and drip into the cylinder and cause other issues. it is usually conductive, and could cause electrical issues. saying that, i have always used anti-seize on spark plugs. i put a tiny drop on the threads of a plug, then i take a second plug and spin it around the threads if the first plug spreading the anti-seize all over the threads of both plugs in a very thin layer. never had an issue. i have however had to remove a seized,broken, and stripped plugs from a head. i'll take the risk. |
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01-27-2018, 08:38 AM | #17 |
Drives: 2015 yaris le Join Date: Feb 2015
Location: hamilton, on
Posts: 149
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No need to use antiseize on most plugs. Some heads like ford Triton have short threads and spark plugs tend to strip easily but not these cars.
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01-30-2018, 03:18 PM | #18 |
Drives: 2008 and 2012 Yaris 2dr Join Date: Oct 2009
Location: NW WI
Posts: 17
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OK, thanks for all the comments. I think I'll continue to not use anything on the plug threads and we'll see what happens.
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