Engine Specifications & Applications of the Caterpillar 3508 Engine Series

 

Overview of the CAT 3508 Engine Series

The Caterpillar 3508 engine series represents one of the most trusted platforms in the high-horsepower diesel engine class. This V8 engine, part of Caterpillar’s legendary 3500 family, is renowned for its robust design, long operational life, and widespread use across marine, power generation, and industrial markets. With a displacement of 34.5 liters (2,105 cubic inches) and horsepower ranging from 850 to 1,900 HP, the CAT 3508 is engineered for high-load, continuous-duty performance.

Whether it’s the original 3508, the improved 3508B, the emissions-updated 3508C, or the electronically enhanced 3508E, this engine line delivers unmatched power density, flexible configurations, and dependable aftermarket serviceability.

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Technical Specifications of the CAT 3508 Engine Family

Variant Highlights:

• 3508 – The original mechanical engine known for simplicity and ruggedness.

• 3508B – Introduced Electronic Unit Injection (EUI) with better fuel economy.

• 3508C – Added lower emissions (Tier 2/IMO II) and improved SCAC cooling.

• 3508E – Integrated full ACERT electronic controls for tighter emissions and optimized performance.

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Notable Features and Engineering Advantages

V8 Power with a Compact Footprint

The 3508 offers high horsepower output in a compact V8 layout, making it suitable for engine rooms and enclosures where V12s or inline configurations won’t fit. The smaller form factor also simplifies repowers, especially in commercial vessels or skid-based power units.

Tiered Emissions Options

From Tier 1 to Tier 2, and IMO I to IMO II, the 3508 family includes variants that meet global emissions standards without compromising engine performance. The ACERT technology used in the 3508E combines precision air handling and advanced combustion to lower NOx and PM output.

Modular Component Design

All 3508 engines use individual cylinder heads, replaceable wet liners, and modular fuel systems to simplify maintenance and extend overhaul life. This design allows for partial repairs and in-frame rebuilds, reducing labor and downtime.

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Common Applications of the CAT 3508 Engine Series

The Caterpillar 3508 engine family is used worldwide in mission-critical equipment. Its versatility allows it to be deployed across a wide range of demanding environments and applications.

1. Marine Propulsion

The 3508 and its variants are extensively used in marine propulsion, including both commercial and government fleets. Applications include:

• Tugboats

• Ferries

• Crew boats and utility vessels

• Dredges

• Fishing trawlers

With strong torque characteristics and high reliability, the 3508 is ideal for continuous-duty marine power. Keel cooling, SCAC systems, and class-approved configurations make it compliant for inland and coastal navigation.

2. Marine Auxiliary & Generators

The 3508 is also used in marine auxiliary roles, including gensets for:

• Shipboard electrical systems

• Hydraulic pumps

• Fire suppression

• Winch and crane systems

Marine operators value its long intervals between overhauls and the robust aftermarket parts ecosystem that supports lifecycle maintenance.

3. Power Generation

In both prime and standby power configurations, the 3508 family delivers reliable power for:

• Hospitals

• Data centers

• Water treatment facilities

• Airports and government buildings

• Mining operations and remote camps

Units are commonly configured for 1200, 1500, or 1800 RPM, delivering between 750 kW to over 1300 kW, depending on the specific variant and alternator pairing.

4. Oilfield Services and Drilling Rigs

The 3508 is frequently integrated into oilfield power modules, powering:

• Frac pumps

• Mud systems

• Drilling rigs

• Generator packages for well sites

These engines thrive in remote, harsh environments due to their robust design, simple repair protocols, and compatibility with mechanical or digital control systems.

5. Industrial Equipment and Mining

Although not as common in modern fleets, many CAT 3508s remain in service powering:

• Conveyor systems

• Crushers and screeners

• Tunnel boring machines (TBMs)

• Material handling and mobile generators

The engine's long service life and rebuildability make it cost-effective to maintain in these applications.

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Global Aftermarket Longevity and Support

Caterpillar’s 3508 engine family is supported by an extensive aftermarket network, and Diesel Pro Power is proud to be a leader in providing high-quality replacement parts for every generation of the 3508. Whether you’re operating an original mechanical 3508 or a later-model 3508E with ACERT controls, our catalog includes:

• Overhaul Kits (in-frame & out-of-frame)

• Fuel Injectors (mechanical and electronic)

• Turbochargers

• Cylinder Heads and Liners

• Water Pumps and Oil Coolers

• Control Modules and Sensors

With over 40,000 satisfied customers worldwide, we offer fast shipping, exceptional service, and expert guidance to keep your 3508 engine operating at peak performance.

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 Additional Resources

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Marine CAT 3508 Component Maintenance Life

 

The Legacy of the Caterpillar Marine 3508 Engine: A Retrospective

 

Understanding the Caterpillar 3500 Series: What Sets These Engines Apart?