Anti-Seize on Spark Plugs with an Aluminum Block

[David Lisle]

Hey Eric,

Can you do a Video explaining why or why not to use Anti-Seize on Spark Plug Threads when the car has an aluminum Engine block? I’ve heard rumor that you shouldn’t use Anti-Seize with these engines.

-Dave

Topic

[twiggy]

My Honda service manual for my 2008 Civic says to put anti-seize on the spark plugs when replacing them. I put very little just enough to barely coat the threads.

[college man]

Anytime metal parts are being inserted into aluminum
its a good idea to use anti seize compound to prevent
thread gouling and insure the fasteners will come back
out.Two dis similar metals cause electrolysis.

[John B Kobberstad]

I always use anti seize on my plugs (just don’t over do the amount you put on) never had a problem with it.

[EricTheCarGuy]

At first I used to do it too. I don’t anymore and you’re right, this would make for a good video.

http://www.ngksparkplugs.com/pdf/DYK_5Points.pdf

[Bob]

I used to have a can of Champion Spark Plug Company Anti-Seize Compound that I used for at least ten years. It was made for spark plugs installed in aluminum aircraft cylinder heads.

Not sure where it can be purchased, the can I had was given to me by an Airframe and power plant mechanic.

In any case you have to be careful not to use to much so it won’t run down the plug threads and onto the plug. It probably contains a conductive element and might possibly cause fouling and or misfires

I believe best practice is never to remove spark plugs from aluminum heads while hot.

Bob

[Author]

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