Spark Plug Torque and Anti-Seize

[Jaywalker]

Everyone seems to agree now that replacement spark plugs should get some anti-seize compound on the threads, but IIRC that wasn't always so. Didn't Ford recommend against this since it could lead to over-torqing the new plugs? So, if I put the AS on, do I reduce the torque a little from the recommended value? Or is the "7 to 15 foot pounds" broad enough already, and just apply 7 foot pounds?

Or am I completely overthinking this...?

 

[Cobraguy]

Well, I have to tell you...I've installed hundreds of spark plugs in my life. I haven't used a torque wrench on a single one. Usually because you couldn't get the wrench in their without extensions and wobblies...and that makes the reading worthless. Good common sense will do wonders. Just keep in mind that 7 to 15 lbs/ft of torque is snug...not hammered tight.

Being I live and have lived in relatively dry climates most my life, I rarely use antiseize on the spark plugs of iron heads. I just haven't had a problem. But it certainly shouldn't hurt. I have heard of stories where they claim the antiseize inhibits a proper grounding of the plug, but I have never seen that. If I lived in a climate, or had a vehicle subjected to conditions that would warrant corrosion, I certainly would. I do use antiseize on aluminum heads. Always...without fail.

 

[Jaywalker]

Yeah, I wondered about torque wrench access - it's pretty tight in there. I'd planned to use an extension (except possibly for #3) - I figured the "7 - 15ft-lb" was based on the expected wobble...

Fair enough - the answer to my "am I overthinking this?" is - yes.

 

[aldive]

Fair enough - the answer to my "am I overthinking this?" is - yes.

I think so.

Further, I would always use antiseize on the plug threads.

Good luck .......