Cummins 6CT, 6CTA, 6CTAA 8.3L Torque & Engine Specifications

Engine Make: Cummins
Engine Cubic Inches: 505
Engine Model: 6CT, 6CTA, 6CTAA 8.3L
Engine Notes: short liner, marked 9161, After Dec 97; CDC After 45636465, DEP After 21301476
Other Notes: After Dec 97, short liner, piston marked 9161
Year/Serial: CDC After 45636465, DEP After 21301476; emission certified
Fuel: Diesel
Cylinders: 6
Bore: 4.488"
Stroke: 5.315"
Firing Order: 1-5-3-6-2-4
Intake Valve Lash: .012" cold (.305 mm)
Exhaust Valve Lash: .024" cold (.610 mm)
Rod Torque: 30, 66, 88 ft/lbs
Head Torque: all bolts 52 ft/lbs, long bolts 105 ft/lbs, all bolts +90 degrees
Main Torque: 37, 88, 129 ft/lbs
Rod Journal Diameter: 2.9916-2.9926"
Main Journal Diameter: 3.8568-3.8588"