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Regarding the spark plugs of the Toyota Corolla, it is advisable to first tighten by hand and then give a quarter turn more. The manual recommends torquing to 150 lb-in if you have a torque wrench that can handle it; which equals approximately 12.5 foot pounds or just under 17 Nm. It is also recommended to use anti-seizing lubricant on the threads to make removal easier in the future. While this step is optional, based on personal experience, taking preventative measures now can prevent future issues.
For a Toyota Corolla, it is recommended to torque the spark plugs to 18 ft/lbs without using anti-seize, and 11 ft/lbs if you have applied anti-seize on the threads.
Between the ages of 35 and 45