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anti seize or not

17K views 31 replies 16 participants last post by  ARBY  
#1 ·
Hey guys, I'm a new rider. Trying to learn and do as much maintenance on my own. This question has probably been asked but I could not find the answer. When I replace my spark plugs, should I use anti seize or not. My parts guy said no, but he said it probably would not hurt anything if I did. The reason I ask this is because there is rust on the exposed metal of my spark plugs. My bike is stored inside. Thanks
 
#3 ·
Depends on which one your Using alumiflake anti seize noooooo Copper flake ant seize yesssssss

Aluminum and Steel don't mix they will weld them selfs together over time and never ever get then apart ever

Many will argue this point but once you have ruined some thing from it you learn a expensive lesion in Life . Good luck on what ever you decide on Doing
 
#4 ·
Re: Anti-seize: copper or aluminum-based? Mixing OK?
The answer is yes and no. An anti seize is composed of a lubricant plus metal flakes. The flakes are there principally to avoid dissimilar metal reactions between the two mating surfaces. The choice between copper and aluminum is determined by the metals involved in the mating, plus by temperature. , and the anti seize function is still delivered by either metal for basically any metal ever encountered in cycling. If we had pure beryllium bikes mated with lithium bottom bracket shells, we might have an issue. But for ti, aluminum, and various steels, the type of flake isn't really all that important. Copper costs slightly more and is slightly more effective in preventing galling, which is a different phenomenon from dissimilar metal corrosion, which is why it's more commonly used in ti frames. In practice, this may be because the copper flakes are more durable and preserve some separation between the mating surfaces and allow that gap to contain some grease, which has nothing to do with chemical reactivity and is purely a mechanical matter. It's an issue that becomes relevant in high speed high temperature titanium applications such as aircraft engines, but not really in bikes. If you see both on the shelf, get the copper version. And I'd say that more because the aluminum seems to dry out a little faster, which leads us to the opposing issue in this discussion.

The other part of anti seize is the grease base used. Now there are lots of different kinds of grease used in copper anti seize, driven by high temperature needs, speed issues, and so on. You're more likely to run into incompatibility in the greases used. They can be natural, synthetic, and all kinds of things in between. Just because they are greases doesn't mean that they will mix and live hospitably together. So practically speaking, it's the grease in the anti seize that creates the biggest issue. And thus my recommendation would be to clean one out completely before using the other. And I'd say the same thing with regard to replacing copper anti seize with more copper anti seize. Unless they came from the same can, clean one out before introducing the other one. One might have a very different grease base from the next.
 
#6 ·
When putting spark plugs in an aluminum head always lubricate the threads. Use either anti seize or a drop of motor oil. Just never dry.
 
#12 ·
If you use anti seize on the spark plugs in an aluminum Ford 4.6 engine, you will become familiar with the sound the spark plug makes when it hits the underside of the hood...

Don`t make assumptions, follow the engine manufacturers service manual.
 
#25 ·
The heads do not have enough threads for the spark plugs, using anti seize lubes the threads, and since there is less friction on the threads when torquing the plugs in, the plugs can be turned farther, causing damage to the threads, and then the noise of the plug hitting the hood thing happens...
 
#21 ·
A boy once asked his father why condoms were sold in packages of three, six, and 12. The father answered: "Three-packs are for high school kids - once on Friday, once on Saturday, and once on Sunday. Six packs are for college students - twice on Friday, twice on Saturday, and twice on Sunday." "But what about 12 packs?", the boy asked. The father replied: "12 packs are for married couples . . . once in January, once in February, once in March . . . ".
 
#24 ·
Hey guys, I'm a new rider. Trying to learn and do as much maintenance on my own. This question has probably been asked but I could not find the answer. When I replace my spark plugs, should I use anti seize or not. My parts guy said no, but he said it probably would not hurt anything if I did. The reason I ask this is because there is rust on the exposed metal of my spark plugs. My bike is stored inside. Thanks
I always do on new plugs and when checking plugs at a tuneup. Reason ... I've had a few that stripped the threads outta the heads and that creates a lot of extra unforeseen labor !