Best spark plugs

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Oct 14, 2024 | 12:49 PM

#11

SheDrivesIt

Joined: Dec 2004

Posts: 10,061

Likes: 324

From: Land of Cincinnati Chili

Quote:

Originally Posted by KC2K

Give that a re-read. What folks are discussing above is accurate. If you use anti-seize and use the OEM recommended torque value, you are actually going to apply MORE force to the plug/threads than desired. So in this case, you would want to reduce your torque wrench target value by 20%.

I'm glad this topic came up as I was generally aware of the no anti-seize note from NGK, but not the reasons why.

After some thought and research, you are absolutely correct. On a lubticated thread, less torque equals the same retention force.

Oct 14, 2024 | 02:19 PM

#12

cosmomiller

Joined: Aug 2012

Posts: 7,882

Likes: 3,425

From: Foothills East of Sacramento

Just for grins and giggles, if I recall correctly, Billman had an old head lying around and he decided to conduct an experiment to see how far he could go in torquing a spark plug into the head. He got as far as 65-70 ft/lbs or so if I remember accurately. It was the plug that failed and the head was not damaged or stripped.

Last edited by cosmomiller; Oct 15, 2024 at 08:34 AM.