engineTiming Chain Guide Torque Specsfor 1990 Mercedes-Benz 420SEL 4.2L V8 M116 · RWDUnitslb-ftNm8 fastenersSeqComponentTorqueAngle—Camshaft Sprocket BoltCritical55 lb-ft · 75 Nm——Crankshaft Pulley BoltCritical130 lb-ft · 176 Nm——Guide BoltsCritical18 lb-ft · 24 Nm——Tensioner BoltCritical15 lb-ft · 20 Nm——Timing Chain Guide BoltsCriticalReplace if worn9 lb-ft · 12 Nm——Timing Cover BoltsCritical10 lb-ft · 14 Nm——Timing Cover Bolts - 8mmCriticalTighten in sequence18 lb-ft · 25 Nm——Valve Cover BoltsTighten in sequence7 lb-ft · 10 Nm—📝 Suggest a correction to this torque spec