Cummins 4BT 3.9L QSB Engine Inframe Overhaul Rebuild Kit, Piston 3957416

Turbocharged, Aftercooled, QSB
239 Cubic Inch
Bore: 4.02 in / 102 mm
Stroke: 4.72 in / 119 mmPiston Marked: 7416CPL Numbers: 8039, 8238, 8239, 8240, 8334, 8335, 8507, 43850, 44247Inframe Kit Includes
(4) Piston & Rings
(4) Rod Bearing Pairs (check if connecting rod is fracture split or machine split)
(1) Main Bearing Set
(1) Head Gasket Set
(1) Oil Pan Gasket

Overhaul Kit Includes
(4) Piston & Rings
(4) Rod Bearing Pairs (check if connecting rod is fracture split or machine split)
(1) Main Bearing Set
(1) Head Gasket Set
(1) Lower Gasket Set 
(1) Front Crankshaft Seal
(1) Rear Crankshaft Seal
(1) Camshaft Bushing
(1) Piston Pin BushingRebuilder SpecsBore: 4.0165"Stroke: 4.724"Rod Journal: 2.7160-2.7170"Main Journal: 3.2672-3.2682"Main Torque: 44, 88, 129 ft/lbsRod Torque: 22, 44 ft/lbs, +60 degreesHead Torque: First torque all bolts to 66 ft/lbs, then all bolts to 66 ft/lbs again. For the longest bolts only tighten in sequence 89 ft/lbs and then longest bolts only 89 ft/lbs again. Final stage is to then turn all bolts +90 degrees.Intake Valve Lash: .010" cold (.254 mm)Exhaust Valve Lash: .025" cold (.635 mm)