ignitionSpark Plugs Torque Specsfor 2021 Toyota Highlander 3.5L V6 · AWDUnitslb-ftNm6 fastenersSeqComponentTorqueAngle—Cover Screws9 lb-ft · 12 Nm——Engine Cover Clips2 lb-ft · 3 Nm——Ignition Coil Bolt9 lb-ft · 12 Nm——Mounting Bolts23 lb-ft · 31 Nm——Spark PlugCriticalGap before install, anti-seize optional16 lb-ft · 22 Nm——Spark PlugsCritical13 lb-ft (18 Nm).15 lb-ft · 20 Nm—📝 Suggest a correction to this torque spec