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Cummins 4BT 4.5L QSB Torque & Engine Specifications

Engine Details & Torque Specs
Engine Make: Cummins
Engine Cubic Inches: 275
Engine Model: 4B QSB 4.5L
Engine Notes: 
Other Notes: 
Year/Serial: 2005-2016
Fuel: Diesel
Cylinders: 4
Bore: 4.0157"-4.0173"
Stroke: 4.882" (124.0 mm)
Firing Order: 1-3-4-2
Intake Valve Lash: .010" cold (.254 mm)
Exhaust Valve Lash: .020" cold (.508 mm)
Rod Torque: 22 ft/lbs, 44 ft/lbs, + 60 degrees . For connecting rod number 5257364 the torque is 33 ft/lbs + 90 degrees
Head Torque: 66 ft/lbs, 66 ft/lbs, + 90 degrees (for equal length head bolts)
Main Torque: For new bolts, 89 lbs, loosen, 44 ft/lbs, 63 ft/lbs, + 120 degrees. For used bolts 44 ft/lbs, 59 ft/lbs, + 90 degrees. 
Rod Journal Diameter: 2.7150-2.7170"
Main Journal Diameter: 3.2662-3.2682"
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