Cummins 4BT 4.5L QSB Torque & Engine Specifications

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"

Recommended Products

Cummins 4BT 4.5L QSB Engine Inframe Overhaul Rebuild Kit, Piston 4089462 From $732.83 to $840.65 CPL Numbers: 8263, 8401, 8402, 8653	Cummins 4BT 4.5L QSB Engine Inframe Overhaul Rebuild Kit, Piston 4934860 From $695.78 to $957.90 CPL Numbers: 1700, 1701, 2743, 8725, 8754, 8755, 8756, 41100, 41472, 41700, 41701, 41703, 42743, 43172, 44195	Cummins 4BT 4.5L QSB Engine Inframe Overhaul Rebuild Kit, Piston 4938619 From $741.33 to $905.56 CPL Numbers: 3059, 3060, 3067, 3313, 3315, 3316, 3962
Cummins 4.5L QSB Cylinder Head, Brand New, Loaded, 3968196, 2831041 From $1,236.27 to $1,798.88 Cummins 4.5L QSB Cylinder Head. Brand New, Loaded. Early or Late Model Available.