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  1. #1
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    Default When To Use Anti Seize on Spark Plugs

    There was some discussion on this topic here in the past. I thought I would link a manufacturer's tech bulletin on this topic.

    http://www.jagrepair.com/images/Auto...1antisieze.pdf
    Jim Lore
    BPG 1037
    "If you cannot clear up the confusion at least make the confusion clear."

  2. #2
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    Default Re: When To Use Anti Seize on Spark Plugs

    God info. Thank You, Jim.
    Jerry
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    My name's Jerry and I'm a caraholic.

  3. #3
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    Default Re: When To Use Anti Seize on Spark Plugs

    Yes, this has been mentioned several times here on V8. I have always used the NGK FR-5 in my aluminum heads, and never used anti seize at all. I screw them in finger tight, then another 3/4 of a turn and that's it. Change them once a year with engine cold, never a problem. Unfortunately, some have the idea that if a little is good, more is better. I've seen people slobber on the anti seize to the point that it surely gets into the combustion chamber. It also can interfere with heat conduction from the plug tip to the surrounding head, causing the plug to overheat. A little dab on the threads is all that's needed when it's called for.
    Larry
    1998 "Fully Optioned" SC3800 Riviera
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  4. #4
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    Default Re: When To Use Anti Seize on Spark Plugs

    I didn't know they all had the ZnCr04 coating. Good info.

  5. #5
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    Default Re: When To Use Anti Seize on Spark Plugs

    Quote Originally Posted by Smokey15 View Post
    God info. Thank You, Jim.
    X's 2
    '71 GS455 - 434371H 12/70
    '70 Skylark convt. project


    '70 GS 350 - dead
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    '68 Sportwagon 400 - sold
    many Skylark - donors

  6. #6
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    Default Re: When To Use Anti Seize on Spark Plugs

    Having worked in a Honda Dealership for many years, where NGK plugs are installed from the factory, I can say that the only time we had issues is when someone had installed Autolite plugs.. they have no plating. NGK, Denso, Champion, AC ect never seemed to be much trouble.

    AHM actually had the service bulletin that said that anti-seize is more likely to cause the issues due to heat transfer reduction, never seen the over torquing angle, but that does make sense.

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  7. #7
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    Default Re: When To Use Anti Seize on Spark Plugs

    My last experience with Autolite plugs was with a Ford Industrial engine. They were factory installed new. I got one out and the next one snapped off level with the surface of the head. So I soaked the next ones with PB blaster or the equivalent for several days. Nevertheless, the remaining ones also snapped off level with the surface head. I looked around the internet and learned this is a very common occurrence when using Autolite plugs.
    Jim Lore
    BPG 1037
    "If you cannot clear up the confusion at least make the confusion clear."

 

 

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