5.9L 24v Cummins

5.9 Cummins ISB Specs, Info, & More

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 24v 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 was part of Cummins "B Series" engine line. 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

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 the High Output model

Injection:

Direct Injection
• 1998.5 - 2002: Electronically controlled Bosch VP44 rotary injection pump
• 2003-2007: Bosch high pressure common rail injection

Aspiration:

Holset turbocharger, intercooled

Valvetrain:

OHV, 4 valves per cylinder, solid lifter camshaft

Valve Lash (Clearance):

 

Exhaust Valves:

0.020" (must be checked with engine cold)

Intake Valves:

0.010" (must be checked with engine cold)

Weight:

Approx. 1,150 lbs

Oil Capacity:

12 quarts

Governed Speed:

3,200 rpm

Horsepower:

235 - 325 HP @ 2,900 rpm

Torque:

460 - 610 lb-ft @ 1,600 rpm

 

5.9L Cummins Dimensions

Length

Width

Height

40.0"

24.9"

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

24v Cummins horsepower & torque by model year graph

High Output 24v Cummins

A high output (H.O. or HO) version of the 5.9L Cummins was available for the 2001 to 2004 model years. For 2001 and 2002, the HO Cummins boasted an additional 10 horsepower and 45 lb-ft of torque. In 2003, the HO model produced a whopping 70 horsepower and 95 lb-ft more than the standard turbodiesel. And for 2004, the optional high output engine claimed 20 horsepower and 45 lb-ft of torque greater than the standard model. The HO Cummins was not available in California, which has always been a state with stricter emissions regulations. The NV5600 6 speed manual transmission was the only transmission available mated to HO models of the Cummins, as at the time the available automatic was not rated with an adequate input capacity. High output models featured higher compression and a unique engine calibration to provide the additional performance.