jstockert

I think it would be a good idea to have a thread for both sides of this issue.

I will start off. I have and still do believe that anti-seize is a good idea for the spark plugs on our trucks and any vehicle with aluminum heads. Due to the fact of different expansion rates of two different metals. I just bought a reman. triton engine and I used seize on the plugs. All aluminum head vehicles I have owned used seize on the plugs. I know these heads have thread issues.
I want a lot of opinions and maybe a couple facts.
Thanks

Tackle

Do whatever you want. This is like Blondes vs Brunettes. Some have a preference to one, some to the other, some don't care and some like both.

2002FX4

Anti seize on lug nuts of every car always. Never on 2v plugs. In fact, I think it's pretty silly to do so.

jstockert

Right. I like both and dont care if the carpet matches the curtains or if the carpet was riped up because it was smelly. I was really wanting opinions or facts as why not to use seize. I was taught to always use seize or anti-ox where a bolt is a different material than the material mating to. Some guys on this forum swear that damage will occur is you use seize.

2thousand5.4

Using anti seize increases the possibility of a plug blow out GREATLY

Cmanjr

Why is this?

2thousand5.4

To tell you the truth I'm not positive. Jbrew or one of those guys will chime in on it and they will have the full detailed response. It has something to do with the 4 thread heads and not using enough torque

iFord

Ok, then I'm gonna do one half with it, one without.

F33lmyWrath

So are you putting it on the upper half or the lower half of the threads?

blupupher

iTrader: (2)

If you do that, do 1, 2, 5, 6 with anti-seize so when they blow out you can get the time-sert in there easier.


As for why anti seize is bad, anti seize does not allow you to get accurate torque on the plug, since the anti seize "squishes" when you tighten, but when you release, the plug can be in there looser than what it should be (or even tighter). With the 4 thread heads this is even more of an issue since their is little for it to grab onto anyway.

I know motorcraft plugs are nickel plated, so the nickel plating does the same thing as anti-seize for keeping the plugs from getting stuck in the heads, but allows for accurate torque application.