Caterpillar 3508

Engine Specifications & Applications of the Caterpillar 3508 Engine

Introduction

The Caterpillar 3508 engine is a V8 powerhouse known for its mechanical simplicity, robust construction, and reliability in heavy-duty diesel applications. As part of Caterpillar’s proven 3500 Series, the 3508 delivers outstanding torque, long service intervals, and the ability to operate under extreme conditions. From offshore marine vessels to land-based power generation and drilling rigs, the 3508 continues to prove itself as one of Caterpillar’s most versatile mechanical engines.

Diesel Pro Power proudly supports this legacy with a complete catalog of high-quality aftermarket parts for the 3508. Our parts are designed to meet or exceed OEM specifications—keeping your engine running longer, while reducing repair and maintenance costs.

This guide provides a comprehensive overview of the 3508’s technical specs and the industries where it thrives, giving operators and technicians the confidence to source all critical components directly from the aftermarket.

Engine Specifications

Base Configuration

• Engine Model: Caterpillar 3508

• Engine Type: 4-stroke, V-8, turbocharged diesel

• Displacement: 34.5 liters (2,105 cubic inches)

• Bore: 170 mm (6.69 inches)

• Stroke: 190 mm (7.48 inches)

• Aspiration: Turbocharged and aftercooled (JWAC or SCAC)

• Fuel System: Mechanical unit injector

• Governor: Hydraulic or mechanical (varies by configuration)

• Flywheel Rotation: Counterclockwise (viewed from flywheel end)

Performance

• Horsepower Range: 850–1,000 bhp depending on rating

• Rated Speed: 1,200 to 1,800 RPM

• Max Torque: Up to 3,400 lb-ft (4,610 Nm)

• Fuel Consumption: 0.33–0.36 lbs/hp/hr

• Emissions: Non-certified / pre-Tier 1

Physical Dimensions

• Length: ~102–108 inches (2,600–2,750 mm)

• Width: ~67–70 inches (1,700–1,780 mm)

• Height: ~76–82 inches (1,930–2,080 mm)

• Dry Weight: 7,000–7,500 lbs (3,175–3,400 kg)

Lubrication & Cooling

• Oil Capacity: ~56–66 liters (15–17.5 gallons)

• Cooling System Capacity: ~90 liters (23.7 gallons)

• Recommended Oil: SAE 15W-40 (CI-4 or better)

• Oil Pressure at Rated Speed: 45–65 psi

Applications of the Caterpillar 3508 Engine

The 3508 was engineered for maximum uptime and minimal electronic dependency. This makes it ideal for remote operations, mission-critical industries, and marine environments where mechanical reliability matters more than advanced emissions control systems. Its rugged build and easy-to-service design allow it to outperform more complex engines in total cost of ownership over its lifecycle.

1. Marine Propulsion & Auxiliary Power

Propulsion Use

The Caterpillar 3508 engine is a favorite in commercial marine fleets, particularly in:

• Tugboats

• Workboats

• Fishing vessels

• Supply boats

• Utility craft

Its V8 format provides exceptional torque in a compact footprint, making it well-suited for vessels requiring consistent power output at medium speed. The 3508’s mechanical simplicity is especially valued by marine operators who need ease of maintenance in environments with limited technical infrastructure.

Typical aftermarket parts used in marine propulsion include:

• Raw water pumps

• Heat exchanger bundles

• Marine-rated head gaskets

• Throttle control cables

• Cylinder kits for in-frame overhauls

Marine Auxiliary Systems

The 3508 is also used to drive shipboard systems such as:

• Onboard electrical generation

• Firefighting systems

• Hydraulic winches and cranes

• Refrigeration units

These engines run in harsh, high-moisture environments, making parts such as starter motors, aftercoolers, and oil coolers essential for longevity. Diesel Pro Power stocks all key components for these auxiliary units with fast shipping worldwide.

2. Power Generation

The 3508 engine is a proven performer in power generation for both mobile and stationary gensets. It’s widely used for:

• Prime power in off-grid communities

• Standby power in hospitals, banks, and airports

• Continuous-duty power in construction sites and remote installations

• Temporary or trailer-mounted power systems

Its mechanical governor ensures consistent frequency control and stable voltage output, making it ideal for critical facilities and infrastructure.

Aftermarket components in high demand for this application include:

• Complete overhaul kits

• Fuel lift pumps and filter bases

• Turbochargers for long-hour performance

• Control panels and senders for monitoring systems

• Vibration dampers and flywheel housing seals

3. Oil & Gas Drilling

The 3508 has long served the oil and gas sector, especially in remote or field-based drilling operations. It is used in:

• Rotary drilling rigs

• Mud pumps

• Hydraulic fracturing pumps

• Portable compressor units

• Generator trailers for well pad support

The engine’s ability to run continuously under high load with minimal downtime makes it a preferred option for upstream energy operations. Because these jobs take place in dusty, hot, and vibration-heavy conditions, wear-and-tear is common.

Diesel Pro Power supports this sector with aftermarket:

• Piston and liner kits

• Crankshaft assemblies

• Fuel injector lines and nozzles

• Camshafts and rocker arms

• Oil bypass valves and high-capacity filters

4. Mining and Quarry Operations

The Caterpillar 3508 is deployed across both surface and underground mining operations due to its dependability in demanding conditions. It powers:

• Haul trucks

• Loaders

• Portable crushing units

• High-volume water and slurry pumps

• Bulk material conveyors

Because equipment in mining environments often runs around the clock, downtime must be minimized. Common aftermarket solutions for these applications include:

• Engine rebuild kits

• High-durability water pumps

• Intake elbows and air filters

• Gasket sets for scheduled overhauls

• Oil cooler cores and pressure regulators

Diesel Pro’s aftermarket inventory is engineered for rapid installation and long-lasting field performance.

5. Industrial and Municipal Use

In stationary setups, the 3508 engine serves as a backbone for:

• Material handling facilities

• Waste management equipment

• Municipal water treatment plants

• Fire suppression pump stations

• Emergency systems in critical infrastructure

For municipalities and operators that value dependability over digital complexity, the mechanical 3508 remains a top-tier solution. Common aftermarket requests for these engines include:

• Sensor kits and pressure switches

• Thermostats and coolant regulators

• Starter assemblies

• Fuel priming systems

• Control cables and brackets

Diesel Pro Power ships these parts globally and supports maintenance professionals with expert-fit guidance.

 Additional Resources

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?