Re: Spark plug size and torque values
by Stefan Miotacz » 6 months ago
For those looking for a direct Nm torque references: a part of an official NGK European catalogue.
It says 15-20 Nm.
Re: Spark plug size and torque values
by Jeff B » 6 months ago
Also, when you lubricate the threads on a bolt, or spark plug, as we are doing with the silicon heat paste, you end up applying about 20% more clamping force for the same torque value. This puts additional load on the threads of both the head and plug shell. I think this is one more reason to stay closer to the bottom of the range. I like 16nm for all plugs, new or old style. That’s probably equivalent to about 19nm for a plug installed dry.
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