C 3500 Truck 2WD V8-454 7.4L VIN J SFI (1999)
Spark Plug: Specifications
Spark Plug Torque
Spark Plug Torque
Tighten 5.0L, 5.7L, 7.4L
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For new iron heads tighten the spark plugs to 30 Nm (22 lb ft) for 5.0L, 5.7L, 7.4L.
Tighten 5.0L, 5.7L
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For (IRON Head-all Subsequent Installations) tighten the spark plugs to 15 Nm (11 lb ft) for 5.0L, 5.7L.
Tighten 7.4L
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For (IRON Head-all Subsequent Installations) tighten the spark plugs to 20 Nm (15 lb ft) for 7.4L.