Isuzu 4JB1, 4JB1T, 4JB1TC, 4JG2 Manuals, Engine Specifications & Bolt Torques

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Isuzu 4JB1, 4JB1T, 4JB1TC, 4JG2
Connecting Rod Nuts

4JG2 engines
Step 1 = 30 Nm
Step 2 = + 45-75 degrees

4JB1 engines
Step 1 = 83 Nm

Isuzu 4JB1, 4JB1T, 4JB1TC, 4JG2
Main Bearing Bolts

Step 1 = 50 Nm
Step 2 = 100 Nm
Step 3 = 167 Nm

Isuzu 4JB1, 4JB1T, 4JB1TC, 4JG2
Cylinder Head Bolts

Step 1 = 50 Nm
Step 2 = + 60-75 degrees
Step 3 = + 60-75 degrees

Isuzu 4JB1
Bore, Stroke, Displacement,
Compression Ratio and Weight

Bore
3.7 inches 93 mm

Stroke
4.0 inches 102 mm

Displacement
169 CID, 2.8 liter

Compression Ratio
18.2:1

Weight
552 lb, 250 kg

Isuzu 4JB1
Power and Torque

Industrial Rating
Intermittent = 52 kW, 70 hp @ 3000 rpm
Continuous = 45 kW, 61 hp @ 3000 rpm
Max Torque = 176 Nm, 132 ft.lb @ 2000 rpm