TM 5-2420-230-24-2
General Engine Specifications
Section E - Engine and Component Identification
Page E-6
B Series
General Engine Specifications
General Engine Data
Bore ...................................................................................................................................... 102 mm [4.02 in]
Stroke ................................................................................................................................... 120 mm [4.72 in]
Displacement
4B .................................................................................................................................. 3.92 liters [239 in3]
6B .................................................................................................................................. 5.88 liters [359 in3]
Compression ratio
4B3.9/6B5.9 Industrial, naturally aspirated ......................................................................................... 18.5:1
4BT3.9/6BT5.9 Industrial, turbocharged .............................................................................................. 17.5:1
4BTA3.9/6BTA5.9 Industrial, turbocharged and aftercooled ................................................................. 16.5:1
B3.9/B5.9* Automotive, charge air cooled .......................................................................................... 17.6:1
Firing order
6 cylinder .................................................................................................................................... 1-5-3-6-2-4
4 cylinder .......................................................................................................................................... 1-3-4-2
Valve Settings
Intake Valve Adjustment ................................................................................................... 0.25 mm [0.010 in]
Exhaust Valve Adjustment ................................................................................................ 0.51 mm [0.020 in]
Engine rotation (viewed from front of engine) ................................................................................... Clockwise
Engine weight (with standard accessories)
4 cylinder engines ........................................................................................... 325 to 350 kg [715 to 770 lb]
6 cylinder engines ............................................................................................ 410 to 440 kg [910 to 970 lb]
Lubrication System
Oil pressure
At Idle (minimum allowable) .................................................................................................. 69 kPa [10 psi]
At rated speed (minimum allowable) .................................................................................... 207 kPa [30 psi]
Regulating valve opening pressure ............................................................................... (1991) 449 kPa [65 psi]
(1994) 517 kPa [75 psi]
Differential pressure to open oil filter bypass valve ....................................................... (1991) 138 kPa [20 psi]
(1994) 172 kPa [25 psi]
Oil capacity of standard engine
4 cylinder engines .................................................................................................... 9.5 liters [10 U.S. Qts.]
6 cylinder engines .................................................................................................. 14.2 liters [15 U.S. Qts.]
Total system capacity
4 cylinder engines ................................................................................................ 11.0 liters [11.6 U.S. Qts.]
6 cylinder engines ............................................................................................... 16.4 liters [17.3 U.S. Qts.]
L-85
