Anti-seize on spark plugs?

I use it on my plugs as well as other items.

Iv never used it on any of my aluminum, or iron heads.
motorcycles, boats cars etc. Never had an issue. However it is recommended to use. Cant hurt and is at least a way to bet even torque and prevents problems. Would use copper base. antisieze.   

If you run Aluminum Heads anti seize is mandatory.
So far I have never coated plugs in Cast Iron heads.
Some plugs run coatings on them to help avoid rust. Champion claims they coat their threads. They also offer a Marine Spark Plug if you really want no rust.

I use Permatex metallic anti-seize on my spark plug threads and other bolts and nuts. (other than head bolts). Someday you, or your mechanic will be glad you did.

8122pbrainard wrote: shierh wrote: Iv never used it on any of my aluminum, or iron heads. motorcycles, boats cars etc. Never had an issue. However it is recommended to use. Cant hurt and is at least a way to bet even torque and prevents problems. Would use copper base. antisieze.    NEVER USE COPPER BASED ANTI ON ALUMINUM HEADS!!!!

GT40 heads are not aluminum, correct?

I use it on all my spark plugs

shierh wrote: curious   why not use copper on aluminum heads?

Have you ever heard of galvanic corrosion?

Steve,
I have more time this morning so I'd like to add to my comment. Opinions are mixed on using copper anti on aluminum. Some like me say never while others say they have never had a problem. I feel the ones who say they have never had a problem may just not have given the application of copper on aluminum time for galvanic corrosion to show up? I have personally seen aluminum fail due from "white rust". Galvanic corrosion is a known and proven fact and the reason there are procedures and products to prevent it. A dielectric union used on plumbing is a good example. Using non metallic bushings and washers to isolate mechanical fastenings is another. If you look at a material chart for galvanic corrosion, aluminum and copper are almost at opposite ends. The father apart materials are on the chart means the potential for the corrosion to exist is greater. Aluminum is the least nobel metal so it will go first. Specific anti seize compounds are made for aluminum. They are basically graphite particles in a grease carrier. Considering there are already other issues with plugs in aluminum heads I wouldn't want to take a chance with using a compound not specifically designed for aluminum that may aggravate the situation . Anti seize compounds are relatively cheap compared to an aluminum head.

shierh wrote: I already knew the answer to this.

Then why did you ask?

The comment about GT-40 Heads and their metallic composition needs to be clarified. Some GT-40 Heads are aluminum. It's unlikely they were ever used in stock marine applications, but its quite possible that there are some in use given the number of people that performed DIY horsepower upgrades to their early marine 351's using salvaged automotive GT-40 heads.. Ford Racing sold them for a while and I believe they were stock on some 5.0L Mustangs. Ebay sell's a lot of them as used automotive parts.

"the only thing they have in common with gt40 iron heads is that they're all made by ford"
Well, it looks like they fit a common engine family 302 / 351. It looks like they share a common valve cover and gasket. It looks like the they share a common marine exhaust manifold. No relation.....................that is a reach.

Mountain Man wrote: "the only thing they have in common with gt40 iron heads is that they're all made by ford" Well, it looks like they fit a common engine family 302 / 351. It looks like they share a common valve cover and gasket. It looks like the they share a common marine exhaust manifold. No relation.....................that is a reach.

They're all Windsor heads but that does not make them related to each other any more than they are related to the stock e7's... Which is to say not at all. No one who knows the first thing about ford heads is going to say "gt40" and mean anything other than the cast iron gt40 heads... Not the x,y or p's. That was my point.

There are some heads out there that are available in both cast iron and aluminum. Same design, only difference being the material. In these cases it is important to specify. The gt40 heads are not one of these cases.

I had changed them this spring because I didn't know what,when or if with mine. Why didn't you change them when you fogged the engine Pete?

Jonny Quest wrote: Keep in mind that anti-seize is a lubricant. 15 foot pounds dry would equate to 10 foot pounds with anti-seize. It is very easy to over torque using anti-seize lubricant. JQ

10 is not 20% less than 15.

gtxragtop wrote: Read this; http://www.designnews.com/author.asp?doc_id=236529&dfpPParams=industry_auto,bid_272,aid_236529&dfpLayout=blog

It's easier to read with a good link!