ignitionSpark Plugs Torque Specsfor 1999 Buick Century 3.1L V6 · FWDUnitslb-ftNm3 fastenersSeqComponentTorqueAngle—Ignition Coil Bolts6 lb-ft · 8 Nm——Spark Plugs - Aluminum HeadCriticalApply anti-seize to threads15 lb-ft · 20 Nm——Spark Plugs - Cast Iron HeadCriticalApply anti-seize to threads22 lb-ft · 30 Nm—📝 Suggest a correction to this torque spec