Cummins 4BTA3.9L Torque & Engine Specifications, piston marked 6631, 6632, 6633, 6634, 6635 machined rod

Engine Details & Torque Specs

Engine Make: Cummins
Engine Cubic Inches: 239
Engine Model: 4BTA3.9L
Engine Notes: piston marked 6631 6632 6633 6634 6635 machined rod
Other Notes: machined split rods, 10mm top ring land, piston marked 6631, 6632, 6633, 6634, 6635
Year/Serial: emission certified
Fuel: Diesel
Cylinders: 4
Bore: 4.0165"
Stroke: 4.724"
Firing Order: 1-3-4-2
Intake Valve Lash: .010" cold (.254 mm)
Exhaust Valve Lash: .025" cold (.635 mm)
Rod Torque: 22, 44 ft/lbs, +60 degrees
Head Torque: 29, 62, 93 ft/lbs
Main Torque: 44, 88, 129 ft/lbs
Rod Journal Diameter: 2.7160-2.7170"
Main Journal Diameter: 3.2672-3.2682"

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