How important is proper spark plug installation torque?

installation PLUG SPARK torque
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How important is proper spark plug installation torque?

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Torque is the most critical part of installation. A spark plug can only transfer heat effectively when it is fully seated on the cylinder head. Under-torqued spark plugs will not seal and transfer heat effectively. Over-torquing can distort a spark plugs internal seals and cause poor heat transfer. aplug with poor heat transfer will allowcylinder temperatures to rise dramatically – eventually leading to detonation and plug or engine damage. To ensure proper torque when installing spark plugs, clean the threads in the head and on the plug, use anti-seize sparingly, and don’t guess – use a torque wrench.

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