Caterpillar 3512 C

Engine Specifications & Applications of the Caterpillar 3512C Engine

Introduction

The Caterpillar 3512C engine is a Tier-certified, electronically controlled, V12 diesel platform engineered for extreme-duty performance in the most demanding environments. With outputs ranging from 1,500 to over 2,000 horsepower and full EPA and IMO emissions compliance, the 3512C represents the modern evolution of Caterpillar’s proven 3500 series—bringing together high torque, intelligent fuel efficiency, and industry-grade durability.

Whether used in a marine propulsion system, standby generator, or field power unit, the 3512C provides operators with smooth throttle response, high power density, and long service intervals. Diesel Pro Power supports this engine with an extensive inventory of premium aftermarket parts designed to meet or exceed OEM standards—delivering fast shipping, technical expertise, and global reliability.

Engine Specifications

Core Configuration

• Engine Model: Caterpillar 3512C

• Engine Type: V-12, 4-stroke cycle, turbocharged and aftercooled

• Displacement: 51.8 liters (3,158 cubic inches)

• Bore: 170 mm (6.69 inches)

• Stroke: 215 mm (8.46 inches)

• Aspiration: Turbocharged, SCAC (Separate Circuit Aftercooling)

• Fuel System: Electronic Unit Injection (EUI)

• Control System: ADEM™ A3 or ADEM™ A4

• Flywheel Rotation: Counterclockwise (viewed from flywheel end)

Performance

• Horsepower Range: 1,500–2,250 bhp (1,119–1,678 kW)

• Max Torque: 6,000+ lb-ft depending on duty cycle

• Rated Speed: 1,200–1,800 RPM

• Fuel Consumption: ~0.32–0.35 lbs/hp/hr (load-dependent)

• Emissions Compliance: EPA Tier 2 / Tier 3 and IMO II configurations available

Dimensions & Weight

• Length: ~130–137 inches (3,300–3,480 mm)

• Width: ~76–80 inches (1,930–2,030 mm)

• Height: ~87–93 inches (2,210–2,360 mm)

• Dry Weight: ~14,000–15,200 lbs (6,350–6,900 kg)

Cooling & Lubrication

• Oil Capacity: 65–80 liters (17.2–21 gallons)

• Cooling System Capacity: ~100 liters (26 gallons)

• Oil Type: SAE 15W-40 (ECF-2/3 compliant)

• Cooling Type: SCAC system with separate aftercooler and expansion tank

Applications of the Caterpillar 3512C Engine

Built to serve in regulated and rugged sectors, the 3512C is a favorite among marine engineers, generator operators, and energy professionals alike. Its robust mechanical base paired with advanced electronics and emissions compliance allows it to serve reliably in the most demanding mission-critical operations.

Diesel Pro Power supports these applications with a full catalog of aftermarket parts for the 3512C—ready to ship worldwide with expert fitment guidance and warranty-backed quality.

1. Marine Propulsion and Onboard Systems

Marine Propulsion

The 3512C is the powerplant of choice for:

• Tugboats

• Crew boats

• Offshore supply vessels (OSVs)

• Large fishing trawlers

• Pilot vessels

• Inland river push boats

Its electronically controlled fuel mapping and turbocharged performance allow for precision throttle response in congested harbors and long-haul duty cycles alike. With full IMO II compliance, the 3512C is approved for operation in regulated waters including U.S. coastal zones and international ports.

Diesel Pro Power supports marine propulsion operators with aftermarket:

• Raw water pumps

• Aftercoolers and SCAC circuit components

• Marine-grade cylinder head gaskets

• Throttle cables and electronic actuator parts

• Turbochargers matched to your duty cycle and altitude

Marine Auxiliary Systems

In addition to propulsion, the 3512C is often used to power:

• Marine generator sets

• Hydraulic winch motors

• Refrigeration units

• HVAC and climate control systems

• Emergency fire suppression pumps

We stock aftermarket parts critical to marine auxiliary systems, including:

• Oil coolers

• Thermostat kits

• Starter motors

• Camshafts and timing gears

• Sensor kits for monitoring pressure, temperature, and RPM

2. Power Generation

The Caterpillar 3512C is used in gensets for:

• Emergency backup systems

• Standby power in data centers and airports

• Prime power in off-grid locations

• Continuous duty generation in water plants and government facilities

The 3512C provides load acceptance, frequency stability, and fuel efficiency, especially important for operations that cannot afford downtime. Tier 2 and Tier 3 versions support international installation requirements.

Diesel Pro supports power generation customers with:

• Full rebuild kits for continuous or standby configurations

• Fuel actuators and electronic throttle controls

• Sensor harnesses compatible with ADEM A3/A4

• Crankshaft assemblies and connecting rod kits

• Air filters, exhaust elbows, and coolant lines

Whether your 3512C is in a 50Hz or 60Hz application, our parts support both RPM ranges with precision-fit solutions.

3. Oilfield and Energy Sector

The 3512C is heavily deployed in:

• Frac pump trailers

• Rotary drilling rigs

• Mud pump drives

• Trailer-mounted generator systems

• Skid-mounted field compressors

The engine’s torque curve, field serviceability, and SCAC cooling system make it ideal for harsh terrain, high altitude, and extreme temperatures.

Diesel Pro provides aftermarket parts optimized for the oil and gas sector, including:

• Fuel rail and injector systems

• Valve train components and rocker arm kits

• Top-end gasket kits for quarterly or annual service

• High-flow oil pumps and bypass valves

• Crankshaft dampers and vibration control hardware

All components are engineered to meet oilfield performance expectations while cutting costs and lead time.

4. Mining and Quarry Equipment

The Caterpillar 3512C is also deployed in:

• Large-capacity haul trucks

• High-tonnage wheel loaders

• Conveyor and crushing systems

• Portable rock crushers

• Dust suppression pump platforms

With thousands of engines in service at quarries, copper mines, and aggregate sites worldwide, aftermarket part availability is essential for daily operations.

Diesel Pro Power supports mining operations with:

• Rebuild kits designed for abrasive conditions

• Air intake elbows and pre-cleaner assemblies

• Thermal protection kits for turbo systems

• Oil filter conversion kits

• High-durability pistons and liner kits

We serve mines from North America to South America, Africa, and Australia with reliable global shipping and expert support.

5. Heavy Industrial Machinery

In heavy construction and large-scale industrial operations, the 3512C powers:

• Concrete batch plants

• Tunnel boring machines

• Rock drills and blasting compressors

• Material handling cranes

• Water pumping and flood control systems

Operators in these industries value:

• Emissions compliance

• Electronic fuel optimization

• Fast throttle response

• Durability under variable load profiles

Our aftermarket catalog includes:

• Sensor kits and electronic modules

• Oil coolers and water pumps

• Turbocharger and manifold rebuild kits

• Control cable assemblies and hardware

• Complete top-end service kits

6. Government, Emergency & Defense Power Systems

The 3512C also supports:

• Municipal power systems

• Wastewater treatment plants

• Disaster recovery power trailers

• Military field generator sets

• Civil defense pump stations

When reliability under pressure is mission-critical, the 3512C offers unmatched performance and predictable maintenance. Diesel Pro Power makes it easy to maintain government fleet assets with:

• Electronic shutdown and alarm modules

• Crankshaft positioning sensors

• Emergency starter motors and gear sets

• Coolant flow valves and tank assemblies

• Thermal sensors and gauge senders

All parts are in-stock, supported by warranty, and compatible with global emissions specs.

Why Choose Aftermarket Parts for the 3512C?

1. Built to OEM Specs (or Better)

Every component Diesel Pro Power offers is built to match the factory requirements for fit, flow, pressure, and performance.

2. Significant Cost Savings

Avoid OEM markup. Our parts reduce your per-hour cost of operation without cutting corners on quality.

3. Fast Global Shipping

We fulfill orders fast and offer worldwide delivery—no matter where your engine is running.

4. Tech Support from Real Experts

Our team helps you identify the correct parts, cross-reference numbers, and avoid compatibility issues—especially for ADEM-controlled engines.

Final Thoughts

The Caterpillar 3512C engine represents the future of regulated high-horsepower diesel systems. Whether you’re powering a tugboat, a frac trailer, or an industrial plant, the 3512C offers rock-solid reliability, precision control, and the emissions compliance your operation demands.

Diesel Pro Power helps extend the life and improve the cost-efficiency of your 3512C engine with a full line of aftermarket parts—from turbochargers to oil pumps, control cables to injector kits.

We’re ready to help you reduce downtime and get back to full power—faster, smarter, and more affordably.

 

Additional Resources

Marine CAT 3512 Component Maintenance Life

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

The Legacy of the Caterpillar Marine 3512 Engine: A Retrospective

Caterpillar 3512 vs. 3516: Which One is Right for Your Vessel?

The Importance of Routine Oil Changes for Caterpillar 3512 & 3516 Engines

How Aftercoolers Help Keep Caterpillar 3512 and 3516 Engines Running Cool

Why Caterpillar 3512 and 3516 Engines Dominate the Marine Industry

Caterpillar 3512 Marine Engine: Why It’s a Workhorse in the Marine Industry

Key Maintenance Tips to Keep Your Caterpillar 3512 Running Strong

How to Improve Fuel Efficiency in Your Caterpillar 3512 Marine Engine

Common Issues in Caterpillar 3512 Marine Engines and How to Fix Them

When Should You Rebuild Your Caterpillar 3512 Engine?

Why the Caterpillar 3512 is a Popular Choice for Tugboats and Offshore Vessels

How to Prevent Overheating in the Caterpillar 3512 Marine Engine

How to Extend the Life of Your Caterpillar 3512 Marine Engine

The Caterpillar 3512 Marine Diesel Engine: Its Applications & Its History Video