I plan on replacing my spark plugs this or next weekend and have been doing a good amount of research thanks to the couple of DIYs I found on here. However, I can't seem to be able to find the answer on whether or not to use Anti-seize on the spark plugs. Some say to use it, other say it messes up the proper torque setting (11-18 lb ft). What do you guys think? Any other tips?

I plan on installing all 6 Denso FXE22HR11 Iridium long-life spark plugs.


2007 Infiniti G35x - 167,000 miles

 

It was designed to go on spark plugs, so it would make a great addition.

 

I don't think you use anti-seize on NGK, but I'd check the instructions.

 

NGK you don't use anti seize on. They actually released a bulletin out on this.

 

Another win for the forum, thanks fellas.

 

Anti-seize compounds are composed of metallic, electrically conductive ingredients. If anti seize compounds come in contact with the core nose of the plugs, it can lead to a misfire condition.

 

Huh, TIL.

 

Very interesting guys. I've been strongly considering NGK (#1406 DILKAR7B11) over Denso, but does anyone know if Denso plugs need anti seize? Should I call Denso?

 

TIL! Great info.

 

go on densos website and see wat they say. get it from the horses mouth

 

see below from the Denso site.

Torque recommendations are for spark plugs with new gaskets.
If using anti-seize compound, use sparingly and reduce torque by 30%.
Denso has created their recommendations based on the general consensus of most engine manufactures. In the case of a discrepancy between the plug manufacturer and engine manufacturers recommendations, always default to the engine manufacturer.