The Cummins ISB 5.9L is a 5.9 L (5,883 cc, 359.0 cu·in) six-cylinder four-stroke liquid-cooled turbocharget diesel engine with a horizontal shaft, manufactured by Cummins from 1998 to 2007.
A 102.0 mm (4.02 in) cylinder bore and 120.0 mm (4.72 in) piston stroke give the ISB 5.9L 24V engine a total of 5,883 cc of displacement. The compression ratio rating is 17.2:1.
This engine produced from 218 PS (160 kW; 215 HP) at 2,700 rpm to 329.0 PS (242 kW; 325.0 HP) at 2,900 rpm of horsepower and from 420 N·m (42.8 kg·m, 309.5 ft·lb) at 1,600 rpm to 610 N·m (62.2 kg·m, 449.6 ft·lb) at 1,600 rpm of torque.
The Cummins ISB 5.9L features:
- OHV design
- Single turbocharger, air-to-air intercooler
- Cast-iron cylinder block
- Cast-iron cylinder head with 24 valves (4 per cylinder)
- High swirl bowl combustion chambers
- Induction hardened forged steel crankshaft
- Chilled ductile iron camshaft
- Cast aluminum pistons and cross rolled micro alloy connnecting rods
General information
| Engine Specifications | |
| Engine model | ISB 5.9L 24V |
| Engine type | 4-stroke, OHV, 6-inline |
| Displacement | 5.9 L, 5,883 cm3, (359 cu·in) |
| Max. horsepower | From 218 PS (160 kW; 215 HP) at 2,700 rpm to 329 PS (242 kW; 325 HP) at 2,900 rpm |
| Max. torque | From 420 N·m (42.8 kg·m, 309.5 ft·lb) at 1,600 rpm to 610 N·m (62.2 kg·m, 449.6 ft·lb) at 1,600 rpm |
| Cooling system | Liquid-cooled |
| Lubricating system | Forced lubrication |
| Fuel system | 1998-2002: Electronically controlled Bosch VP44 rotary injection pump 2003-2007: Bosch high pressure common rail injection system |
| Turbocharger | 1998-1999: Holset HX35W 2000-2004: Holset HY35W 2004-2007: Holset HE351CW |
| Firing order: | 1-5-3-6-2-4 |
| Dimensions (L x W X H) | 1015 x 633 x 963 mm (40 x 24.9 x 37.9 in) |
| Dry weight | 522 kg (1150.0 lbs) |
Cylinder Block and Head
| Cylinder block | |
| Cylinder block alloy: | Сast-iron |
| Compression ratio: | 17.2:1 |
| Cylinder bore: | 102.0 mm (4.02 in) |
| Piston stroke: | 120.0 mm (4.72 in) |
| Cylinder internal diameter (standard): | 102.000-102.116 mm (4.0157-4.0203 in) |
| Piston skirt outer diameter (standard): | 101.750-101.793 mm (4.0059-4.0076 in) |
| Number of piston rings (compression / oil): | 2/1 |
| Piston pin diameter: | 39.990-40.003 mm (1.5744-1.5749 in) |
| Side clearance (Second): | 0.045-0.095 mm (0.0018-0.0037 in) |
| Side clearance (Oil): | 0.040-0.085 mm (0.0016-0.0033 in) |
| Ring end gap (Top): | 0.260-0.360 mm (0.0102-0.0142 in) |
| Ring end gap (Second): | 0.850-1.150 mm (0.0335-0.0453 in) |
| Ring end gap (Oil): | 0.250-0.550 mm (0.0098-0.0217 in) |
| Number of main bearings: | 7 |
| Crankshaft main journal diameter: | 82.962-83.013 mm (3.2662-3.2682 in) |
| Cylinder head | |
| Cylinder head alloy: | cast-iron |
| Valve arrangement: | OHV, gear driven |
| Valves: | 4,(24 valves in total) |
| Valve steam diameter (INTAKE): | 6.960-7.010 mm (0.274-0.276 in) |
| Valve steam diameter (EXHAUST): | 6.960-7.010 mm (0.274-0.276 in) |
| Camshaft lobe height (INTAKE): | 47.175-47.855 mm (1.8573-1.8841 in) |
| Camshaft lobe height (EXHAUST): | 45.632-46.312 mm (1.7965-1.8233 in) |
| Camshaft journal diameter №1 and 7: | 54.028-54.048 mm (2.1271-2.1279 in) |
| Camshaft journal diameter №2-6: | 53.962-54.013 mm (2.1245-2.1265 in) |
Tightening torque specs
| Tightening procedure and torque specs | |
| Main bearing cap | Step 1: 50 Nm; 5.0 kg·m; 37 ft·lb Step 2: 80 Nm; 8.0 kg·m; 59 ft·lb Step 3: Turn all bolts 90° |
| Connecting rod bearing bolts | Step 1: 30 Nm; 3.0 kg·m; 22 ft·lb Step 2: 60 Nm; 6.0 kg·m; 44 ft·lb Step 3: Turn all bolts 60° |
| Flywheel fixing bolts | 137 Nm; 14.0 kg·m; 101 ft·lb |
| Head tightening procedure and torque specs | Step 1: 70 Nm; 7.0 kg·m; 52 ft·lb Step 2: Back off 360° Step 3: 105 Nm; 10.5 kg·m; 77 ft·lb Step 4: Verify: 105 Nm; 10.5 kg·m; 77 ft·lb Step 5: Turn all bolts 1/4 turn |
Service Data
| Cylinder compression pressure | |
| Minimum: | 24.0 bar (24.5 kg/cm2; 350 psi) |
| Valve clearance | |
| Intake valve clearance (COLD): | 0.25 mm (0.010 in) |
| Exhaust valve clearance (COLD): | 0.50 mm (0.020 in) |
| Oil system | |
| Lubrication system: | Forced lubrication |
| Oil type: | CD or higher |
| Recommended oil: | SAE 5W4-40 |
| Oil capacity: | 11.4 L (12.05 US. qt, 10.03 Imp. qt.) |
| Oil pressure: | 69 kPa (10 psi) at Idle rpm 207 kPa (30 psi) at 2,500 rpm |
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