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What is the spark plug torque spec for a 1991 Jeep Cherokee 4 liter engine?

The spark plug torque specification for a 1991 Jeep Cherokee with a 4.0L engine is 15 ft-lbs (20 Nm). However, always double-check your specific owner's manual or a reputable repair manual as slight variations can exist. Using a torque wrench is crucial to avoid over-tightening and damaging the spark plugs or threads in the cylinder head.