24v Cummins Turbodiesel

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5.9L 12v Cummins Specs

6.7L Cummins Specs

Cummins 53 Block

4BT Cummins Specs

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5.9L 24v Cummins

5.9L Cummins ISB Specs

 

 

 

 

 

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 acronym "ISB" stands for Interact System B. 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, a high ouput (HO) version of the 24v Cummins was made available, which offered a slight increase in power for manual transmission equipped trucks. The 5.9L Cummins was altogether retired mid-way through the 2007 model year, being replaced by the more emissions friendly 6.7L Cummins.

 

 

5.9L Cummins Specs

Displacement:

359 cubic inches, 5.9 liters

Configuration:

Inline 6 cylinder

Firing Order:

1-5-3-6-2-4

Compression Ratio:

16.3:1, 17.2:1 (high output version)

Bore:

4.02 inches

Stroke:

4.72 inches

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.

Oil Capacity:

12 quarts

Weight:

Approx. 1,150 lbs

Horsepower:

235 - 325 HP @ 2,900 rpm.

Torque:

460 - 610 lb-ft @ 1,600 rpm.

Governed Speed:

3,200 RPM

Years Produced:

1998.5 - 2007

 

 

24v Cummins Horsepower & Torque by Model Year

Model Year

Horsepower & Torque Rating(s)

1998 - 2000

215 hp @ 2700 rpm & 420 lb-ft @ 1,600 rpm with automatic transmission, 235 hp @ 2,700 rpm & 460 lb-ft @ 1,600 rpm with manual transmission.

2001 - 2002

235 hp @ 2,700 rpm & 460 lb-ft @ 1,400 rpm standard output model, 245 hp @ 2,700 rpm & 505 lb-ft @ 1,600 rpm high output model.

2003

235 hp @ 2,700 rpm & 460 lb-ft @ 1,400 rpm (standard), 305 hp @ 2,900 rpm & 555 lb-ft @ 1,400 rpm (optional High Output, not available in CA).

2004

Three power ratings were available for the 2004 MY; 235 hp @ 2,700 rpm & 460 lb-ft @ 1,400 rpm (CA models), 305 hp @ 2,900 rpm & 555 lb-ft @ 1,400 rpm (standard), 325 hp @ 2,900 rpm & 600 lb-ft @ 1,600 rpm (optional High Output).

2005 - 2007

The 2005 to 2007 MY Cummins was rated at 325 hp @ 2,900 rpm & 610 lb-ft @ 1,600 rpm.

 

 

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 MY, 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, fuel system refinements, and timing adjustments to provide the additional performance.

 

5.9L Cummins ISB Info

• ISB is the acronym for Interact System B.
• Assembled at the Cummins Columbus, Indiana assembly plant; the same city in which "Cummins Engine Company" was founded.
• All fuel systems on the 24v Cummins were electronically controlled, including the years that the it used a mechanical injection pump.
• Does not use glowplugs, but rather a heater grid mounted beneath the air horn.
• The VP44 injection pump failure rate was much higher than that of the P1700 that was used on the 6BT (12v).
• Used forged steel connecting rods for strength.
• The 5.9L ISB made Ward's 10 Best Engines list in 2004.
• Power output on automatic equipped Cummins powered Rams was slightly downrated for the manual transmission equipped Rams from 1998 - 2001.
• Production of the 5.9L Cummins ended completely in June 2009.