X2. Steel male plug threads in aluminum female thread = dissimilar material. Always use a dab. And NEVER stick cold plugs in a hot engine.

 

Steel and Aluminum DO NOT LIKE EACH OTHER, when it comes to spark plugs use the anti-seize just like the manual tells you to do. Anti-seize will not cause corroding, thats the whole point. If the aluminum head and the steel spark plug corrode and lock together, you will pull the threads right out of the head. If your under warranty i doubt they are going to fix it if you did not use the anti-seize on the plugs.

 

What Jeff said.

 

Never have heard of that. But good idea!

 

Yup, have had what Jeff said happen. Granted they were in an aluminum headed V8 a lot longer than they should have happened, it still happened.

The harder metal always wins. Anti-seize is cheaper and easier than fixing a head IMO.

 

I always use it. Even though I use it, I have never left spark plugs in a motorcycle long enough that they could seize up and strip out a head. I just like to know that they can't.

 

With all the heat in these motors I always use it. Being cautious never hurts.

 

I've had to have an aluminum head helicoiled before because the threads came out with the plug. Not a Harley, but the same effect, and this was a water-cooled engine.

Just two little dabs, 180 degrees apart, at the start of the threads. It will work its way into the threads as you screw it in. Don't goop it on there like roughnecks do with drill pipe on oil rigs. If you use too much you'll just have a mess to clean up in a hard to reach spot, plus you'll run the risk of it seeping down onto the electrode.

 

It doesn't hurt anything.
Better safe than sorry.
Cheap insurance.

 

Well, about 50/50 for and against. I am about to change them for the 5000 miles service. Didnt realize.the manual says to use antiseize. I think I will use it if manual says to.