Replacing spark plugs on 2010 ultra classic for first time. Two quick questions:
1. What is torque setting when I tighten and install new ones?
2. Do I need to put anything on spark plug threads before installing?

Installing HD plugs.

Thanks

 

Nothing needed on the threads, the torque spec is "snug" which is a lot less than "grunt".

My owners manual says in the absence of a torque wrench, finger tight then 1/4 turn

also 12-18 foot pounds is the torque listed in able six of my owners manual

 

Silver antisieze on the threads.

 

Thank you very much, very helpful information.

 

IF (and I don't) use anti seize please use the high temperature stuff, the regular stuff is not made for high heat applications, it is the copper stuff that is



there are applications that do call for it ( ford 5.4 engines!) but not ours

 

Permatex anti-seize lubricant 80208 is rated for use from -60 F up to 1600 degrees F. I think that might encompass the operating temperatures of a Harley.

 

I've always used the Permatex silver on everything I own, doesn't matter if the heads are aluminum or iron. Never had a stuck plug.

 

+1 on anti seize. I just use the silver cause thats what we have sittin in the grage and its worked for me. Torque is as stated 12-18 ft lbs or snug dont over tighten as the threads are only aluminum.

 

Anti seize isn't called for, but I wouldn't put plugs in without it.

But I'm also the guy that puts dielectric grease on my fuses, and every electrical plug I come in contact with.

Maybe not necessary, but a bit of prevention never hurt anything.

 

Steel threads in aluminum heads--use anti seize. Even if you don't think you need it, the first time you have to have a helicoil installed, or worse yet replace a head, you'll know why. Torque--12 to 18