Cummins 6CT, 6CTA, 6CTAA8.3L Torque & Engine Specifications

Engine Make: Cummins
Engine Cubic Inches: 505
Engine Model: 6CT, 6CTA, 6CTAA8.3L
Engine Notes: long liner, marked 9161, Thru Dec 97; CDC 44706126-45636465, DEP 21123436-21301476, Brazil After 30417119
Other Notes: Thru Dec 97, long liner, piston marked 9161
Year/Serial: CDC 44706126-45636465, DEP 21123436-21301476, Brazil After 30417119; 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: before 91': 27, 110, 148 ft/lbs, 91' & up: 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"