5.9L CUMMINS ISB SPECS & INFO

In 1998, the 12v Cummins was phased out in favor of a redesigned 24 valve version of the engine, the 5.9L Cummins ISB (often referred to simply as the 24 valve Cummins).

The ISB featured a Bosch VP44 rotary type injection pump until 2003, when the injection system was upgraded to a Bosch high pressure common rail. Power output and performance potential were significantly increased thanks to the common rail injection system. For the 2001 model year, an optional High Output (HO) version of the 24v Cummins was made available, which offered an increase in output – it was only available with a a manual transmission. The 5.9L Cummins was altogether retired mid-way through the 2007 model year, being replaced by the more emissions friendly 6.7L Cummins.

The acronym “ISB” stands for Interact System, B Series. It represents the fact that the engine uses an electronically controlled injection system, and is part of Cummins “B Series” engine family. All 24v Cummins were assembled at the company’s Columbus, Indiana assembly plant, the same city in which the “Cummins Engine Company” was founded. For 2004, the engine was selected as one of Ward’s “10 Best Engines” for the year. Production of the 5.9L ISB ended completely (all applications) in June of 2009.

5.9L CUMMINS 24V SPECS

Production Years: 1998 – 2007
Configuration: Inline 6 cylinder
B50 Life: 350,000 miles (~560,000 km)
Displacement: 359 cubic inches, 5.9 liters
Bore x Stroke: 4.02″ x 4.72″
Cylinder Head Material: Cast iron
Engine Block Material: Cast iron
Firing Order: 1-5-3-6-2-4
Compression Ratio: 16.3:1, 17.2:1 for High Output models
Injection: Direct Injection (DI)
1998.5 – 2002 Electronically controlled Bosch VP44 rotary injection pump
2003 – 2007 Bosch high pressure common rail injection
Aspiration: Single turbocharger, air-to-air intercooler
1998.5 – 1999 Holset HX35W
2000 – 2004 Holset HY35W
2004.5 – 2007 Holset HE351CW
Valvetrain: OHV, 4 valves per cylinder, solid lifter camshaft
Valve Lash (Clearance):

 

Exhaust Valves: 0.020″ (engine cold)
Intake Valves: 0.010″ (engine cold)
Weight: Approx. 1,150 lbs
Oil Capacity: 12 qts w/ filter
Governed Speed: 3,200 rpm
Horsepower: 235 – 325 HP @ 2,900 rpm
Torque: 460 – 610 lb-ft @ 1,600 rpm
Engine Dimensions: Length: 40.0″
Width: 24.9″
Height: 37.9″

24V CUMMINS HORSEPOWER & TORQUE BY MODEL YEAR

Note – The following ratings are only applicable to Dodge pickups.

Model Year Horsepower Torque
1998 – 2000 • 215 hp @ 2,700 RPM (auto trans)
• 235 hp @ 2,700 RPM (man trans)
• 420 lb-ft @ 1,600 RPM (auto trans)
• 460 lb-ft @ 1,600 RPM (man trans)
2001 – 2002 • 235 hp @ 2,700 RPM
• 245 hp @ 2,700 RPM (H.O.)
• 460 lb-ft @ 1,400 RPM
• 505 lb-ft @ 1,600 RPM (H.O.)
2003 • 235 hp @ 2,700 RPM
• 305 hp @ 2,900 RPM (H.O.)
• 460 lb-ft @ 1,400 RPM
• 555 lb-ft @ 1,400 RPM (H.O.)
2004 • 235 hp @ 2,700 RPM (CA)
• 305 hp @ 2,900 RPM (std)
• 325 hp @ 2,900 RPM (H.O.)
• 460 lb-ft @ 1,400 RPM (CA)
• 555 lb-ft @ 1,400 RPM (std)
• 600 lb-ft @ 1,600 RPM (H.O.)
2005 – 2007 325 hp @ 2,900 RPM 610 lb-ft @ 1,600 RPM