Remanufactured Cummins ISM 10.8L (661 ci) Engine For Sale
1998–2016 — 280–500 hp | 1,050–1,550 lb-ft
The Cummins ISM 10.8L was introduced in 1998 as a replacement for the M11, filling the gap between the ISL 8.9L and the ISX 15.0L. The ISM was designed for applications where the ISX was too heavy or ...
Starting from $7,500 – $12,000 — 1-Year Unlimited Mileage Warranty
Cummins ISM Technical Specifications
About the Cummins ISM Engine
The Cummins ISM 10.8L was introduced in 1998 as a replacement for the M11, filling the gap between the ISL 8.9L and the ISX 15.0L. The ISM was designed for applications where the ISX was too heavy or too powerful, but the ISL didn't provide enough capability. It became particularly popular in regional haul, tanker, and flatbed applications where a lighter engine improved payload capacity. The ISM was also the engine of choice for many luxury motorcoach manufacturers, where its smooth operation and adequate power made it ideal for coach applications. The ISM was discontinued in 2016 when Cummins consolidated its heavy-duty lineup around the ISX15 (X15) and ISL9 (L9), but thousands of ISM-powered trucks and coaches remain in active service.
Cummins ISM Strengths
- Lighter than the ISX — improves payload capacity by 200-400 lbs
- Excellent fuel economy in regional haul and vocational applications
- Smooth, refined operation — preferred by motorcoach manufacturers
- Lower operating costs than the ISX for applications that don't need 500+ hp
- Proven M11 architecture with decades of refinement
- Good parts availability despite being discontinued
Common Cummins ISM Issues (Addressed in Our Remanufactured Engines)
- HPI fuel system issues on early models can cause hard starting and rough idle
- EGR cooler failure on 2002-2010 models (similar to ISX)
- Turbo actuator failure on VGT-equipped models causes reduced power
- Oil pan gasket leaks are common on high-mileage engines
- Coolant crossover tube O-ring leaks can cause external coolant loss
- Injector sleeve leaks on some model years cause coolant contamination in fuel
Vehicles with the Cummins ISM
Available Cummins ISM Remanufactured Engines
Cummins ISM Buying Guide
When purchasing a remanufactured Cummins ISM, verify the emissions level matches your truck's model year. Pre-EGR models (1998-2002) are the simplest and most reliable. For motorcoach applications, verify the horsepower rating and accessory drive configuration. The ISM was discontinued in 2016, so parts availability may become more limited over time — consider this when planning long-term ownership. A quality remanufactured ISM should include new injectors, a rebuilt turbo, and updated EGR components (if applicable).
Frequently Asked Questions — Cummins ISM
How much does a remanufactured Cummins ISM engine cost?
A remanufactured Cummins ISM 10.8L engine typically costs between $7,500 and $12,000 depending on the model year, emissions configuration, and horsepower rating. Pre-EGR models are generally less expensive. All our ISM engines are fully dyno tested and backed by our comprehensive warranty. Call (631) 991-7700 for an exact quote.
What replaced the Cummins ISM?
The Cummins ISM was discontinued in 2016 when Cummins consolidated its heavy-duty engine lineup. Applications that previously used the ISM now use either the ISX15/X15 (for heavy-duty) or the ISL9/L9 (for medium-heavy-duty). The ISM's displacement class (10.8L) is no longer offered by Cummins.
Is the Cummins ISM reliable?
Yes, the Cummins ISM is a reliable engine, particularly the pre-EGR models (1998-2002). It shares its architecture with the proven M11 and benefits from decades of refinement. Pre-EGR ISM engines are known for excellent reliability with proper maintenance. EGR-equipped models (2002+) require more attention to the emissions system.
What is the difference between ISM and ISX?
The ISM is a 10.8L engine producing 280-500 hp, while the ISX is a 15.0L engine producing 400-600 hp. The ISM is lighter (by 200-400 lbs) and more fuel-efficient for applications that don't need maximum power. The ISX is designed for heavy-haul and long-distance applications where maximum power and torque are required.
What trucks use the Cummins ISM?
The Cummins ISM was popular in regional haul trucks, tankers, and flatbeds including Peterbilt 387/386/384, Kenworth T660/T2000, Freightliner Century/Columbia, International ProStar/9200, and Volvo VNM. It was also widely used in luxury motorcoaches from Prevost and MCI.
How many miles can a Cummins ISM last?
A well-maintained Cummins ISM can last 500,000 to 800,000+ miles. Pre-EGR models tend to last longer due to their simpler design. The ISM shares its robust architecture with the M11, which was known for excellent longevity. Regular maintenance and clean fuel are key to maximizing ISM engine life.
Cummins Troubleshooting Guides
Cummins ISX Problems
6 common ISX issues: EGR cooler, injectors, cam followers, turbo failures.
Read Guide →Cummins ISB / B6.7 Problems
EGR, turbo VGT, injector, DPF/SCR, and oil leak issues explained.
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Complete pricing for remanufactured Cummins engines by model.
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Read Guide →Installation Guide
Step-by-step guide for installing your remanufactured Cummins engine.
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