Cummins QSB 3.9L Torque & Engine Specifications
Engine Details & Torque Specs
Engine Make: Cummins
Engine Cubic Inches: 239
Engine Model: QSB 3.9L
Engine Notes: piston marked 7416 7417 7418 7419 7420 fractured rod
Other Notes: fracture split rods, piston marked 7416, 7417, 7418, 7419, 7420
Year/Serial: Fuel: Diesel
Cylinders: 4
Bore: 4.0165"
Stroke: 4.724"
Firing Order: 1-3-4-2
Intake Valve Lash: .006-.015"
Exhaust Valve Lash: .015-.030" (.381-.762 mm)
Rod Torque: 22, 44 ft/lbs, +60 degrees
Head Torque: 60, 90 ft/lbs, +90 degrees
Main Torque: 37, 45, 66 ft/lbs, +90 degrees
Rod Journal Diameter: 2.7160-2.7170"
Main Journal Diameter: 3.2672-3.2682"
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