Question about Antisieze & Spark Plugs - Jeep Commander Forums: Jeep Commander Forum
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post #1 of 16 (permalink) Old 10-24-2009, 09:44 AM Thread Starter
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Question about Antisieze & Spark Plugs

I am about to replace the plugs on my 06 4.7. Do I need to put antisieze on the threads?
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post #2 of 16 (permalink) Old 10-24-2009, 11:33 AM
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it doesnt hurt. especially if you plan on changing them again. i also use dielectric grease on the end where it attaches to the coil packs

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post #3 of 16 (permalink) Old 10-24-2009, 01:25 PM Thread Starter
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Are the heads aluminum?
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post #4 of 16 (permalink) Old 10-24-2009, 01:43 PM
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Heads ARE aluminum.

Rob


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post #5 of 16 (permalink) Old 10-24-2009, 02:24 PM Thread Starter
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Quote:
Originally Posted by robby View Post
Heads ARE aluminum.

Rob
Thanks all Antiseize it is.
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post #6 of 16 (permalink) Old 10-24-2009, 05:22 PM
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One of the times I swapped out the plugs on the Commander I forgot to buy antisieze and installed them without it. It didnt cause any issues but since I have been using it.




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post #7 of 16 (permalink) Old 10-25-2009, 09:09 AM
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definitely go for the anti sieze and ensure the engine is cold before taking out the plugs.
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post #8 of 16 (permalink) Old 05-21-2015, 08:17 PM
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I know this is a really old thread but had a similar question.... and hate to see dozens of threads, all asking the same thing. I have a 2007 Hemi and will be swapping plugs tomorrow, for the first time. It has the steel head and the Champion 570 plugs that don't use a crush washer. I understand that the use of anti seize requires about a 25% reduction in torque and not to get carried away applying it.

I know its important especially on aluminum heads but just wanted to confirm that "everyone" uses a little dab of anti-seize on their spark plugs threads, no matter whether they are aluminum or steel heads.
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post #9 of 16 (permalink) Old 05-21-2015, 11:41 PM
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Anti-seize s not required nor is it a good idea for use on sparkplugs. I know it is commonly used but I have personally talked to Engineers at sparkplug companies both at Champion and NGK whom have stated not to use it. Modern sparkplugs are plated so that the threads do not require lubrication in either aluminum or iron cylinder heads. Anti-seize can also act as an insulation layer that can insulate the plug from the cylinder head and keep the heat from the plug insulator from being transferred to the cylinder head thereby effectively increasing the heat range of the plug. If you feel that the plug threads must be lubricated graphite should be used. Champion years ago used to sell a sparkplug thread lubricant that was essentially alcohol with graphite mixed in it. The graphite will not interfere with the heat transfer of the sparkplug. You have to be careful though not to get any graphite on the sparkplug tip or insulator as graphite is electrically conductive and cause plug misfiring. A lubricated sparkplug thread will reduce the needed torque value by 20%. It is easier to strip sparkplug threads that have been lubricated from over-torque.

Dan

Last edited by bdalameda; 05-21-2015 at 11:49 PM.
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post #10 of 16 (permalink) Old 05-21-2015, 11:49 PM
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Here is some info directly from NGK
http://www.ngksparkplugs.com/pdf/dyk_5points.pdf
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