5.9L 24-valve Cummins ISB
In 1998, the BT 5.9 was redesigned as a 24 valve engine to updated emission requirements. ISB stands for Interact System B. The ISB featured a Bosch VP44 rotary injection pump until 2003, when the injection system was upgraded to a Bosch high pressure common rail fuel injection system, which increased power output. In 2001, a high output (HO) version of the ISB became available, which slightly increased the ouput of manual transmission equipped trucks. A 610 version of the ISB became available which pushed torque to 610 lb-ft. Well known for its low speed torque, the Cummins 5.9 ISB has an advantage over V8 diesel engines in the light duty truck market.
5.9L Cummins ISB Specifications:
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 |
Aspiration: |
Holset turbocharger |
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 of Operation: |
1998.5 - 2007 |
5.9L Cummins ISB Info:
• ISB is the acronym for Interact System B.
• The 5.9L ISB made Ward's 10 Best Engines list in 2004.
• Power output on automatic equipped Cummins powered Rams was slightly downrated from the manual transmission equipped Rams from 1998 - 2001.
• Production of the 5.9L Cummins ended June 2009.
Related Topics:
| 5.9L 12v Cummins Specs | 6.7L Cummins Specs |
| 4BT Cummins Specs | 48RE Transmission Specs |
| #53 5.9L Cummins Block Castings | Cummins Diesel Timeline |
| 47RE Transmission Specs |
5.9L Cummins ISB Specs