CAT MAK 16CM32 Diesel Engine – Overview, Applications, and Specifications

What is CAT MAK 16CM32?

The CAT MAK 16CM32 is a medium-speed, four-stroke diesel engine manufactured by Caterpillar Motoren (MaK), designed primarily for marine propulsion and power generation applications. It belongs to the MaK CM32 engine series, known for its high efficiency, reliability, long service intervals, and ability to operate on heavy fuel oil (HFO), marine diesel oil (MDO), or marine gas oil (MGO).

The engine features a robust cast-iron block structure and a precision-forged crankshaft designed to withstand high combustion pressures and continuous heavy-duty operation. Its modular construction allows easier maintenance, overhaul, and component replacement.

Where is CAT MAK 16CM32 Used?

The CAT MAK 16CM32 engine is widely used in:

• Commercial cargo vessels (bulk carriers, container ships, tankers)

• Passenger ferries and Ro-Ro vessels

• Offshore support vessels

• Tugboats

• Power generation plants (base load and standby)

• Island and remote area power stations

• Marine auxiliary generator sets

Its durability and fuel flexibility make it suitable for both marine propulsion engines and marine auxiliary generator engines.

General Technical Specifications

Engine Type:
Medium-speed, four-stroke diesel engine

Configuration:
16 cylinders in V-configuration

Bore:
320 mm

Stroke:
480 mm

Displacement:
Approx. 38.6 liters per cylinder

Total Displacement:
Approx. 618 liters

Speed Range:
Typically 600 – 750 rpm

Power Output:
Approximately 7,680 kW – 8,000 kW (depending on version and rpm)

Mean Piston Speed:
Approx. 9.6 – 12.0 m/s

Main Structural Components

Engine Block
The engine block is made of high-strength cast iron and forms the main structural body of the engine. It houses the cylinder liners, crankshaft bearings, and cooling passages. The block is designed to withstand high mechanical loads, vibration, and thermal stress during continuous operation.

Crankshaft
The crankshaft is a forged steel component designed for maximum fatigue resistance and precise rotational balance. It converts the linear motion of the pistons into rotational energy and is supported by multiple main bearings to ensure smooth and stable operation.

Cylinder Liners
Replaceable wet-type liners ensure effective cooling and long service life.

Cylinder Heads
Each cylinder has an individual cylinder head with integrated fuel injection, intake, and exhaust valves.

Pistons and Connecting Rods
Forged steel connecting rods and high-strength pistons ensure durability under high pressure.

Fuel Capability

Supported fuels include:

• Heavy Fuel Oil (HFO)

• Marine Diesel Oil (MDO)

• Marine Gas Oil (MGO)

• Distillate fuels

Optional capability for low-sulfur and IMO-compliant fuels.

Cooling System

The engine uses a two-circuit cooling system:

• High-temperature circuit for cylinder jackets

• Low-temperature circuit for charge air cooling and lubricating oil cooling

Lubrication System

A forced lubrication system provides oil to:

• Crankshaft bearings

• Connecting rod bearings

• Camshaft

• Pistons and cylinder liners

This ensures reduced wear and extended service intervals.

Air and Exhaust System

Turbocharged and intercooled system provides:

• Higher efficiency

• Increased power density

• Reduced fuel consumption

• Lower emissions

Efficiency and Performance

Typical Specific Fuel Consumption (SFC):
Approx. 175 – 185 g/kWh (depending on load and configuration)

High thermal efficiency and optimized combustion design reduce operating costs.

Maintenance and Reliability Features

• Modular component design

• Replaceable cylinder units

• Long overhaul intervals

• Durable crankshaft and reinforced block construction

• Easy access for inspection and service

Key Advantages

• High reliability and long service life

• Fuel flexibility (HFO, MDO, MGO)

• Low operating cost

• Proven marine industry performance

• Strong engine block structure for durability

• Precision-engineered crankshaft for smooth operation

• Suitable for propulsion and power generation

Manufacturer

Manufacturer: Caterpillar Motoren GmbH & Co. KG (MaK)
Brand: CAT MaK
Series: CM32

The CAT MAK 16CM32 is considered one of the most reliable medium-speed diesel engines for marine and stationary power generation, combining robust mechanical design, efficient fuel consumption, and long-term operational stability.