M 32 E

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Caterpillar Motoren designed the M 32 E based on the reliable M 32 C engine series. The M 32 E will share the same footprint as the successful M 32 C. The M 32 E is the first MaK 5 MW engine in the 320 mm bore segment. The new design still supports operation at any ambient condition without load reduction.

Power Rating

  • Power Range 3300 - 4950 kW 3300 - 4950 kW

Engine Specifications

  • Speed Range 720-750 rpm 720-750 rpm
  • Emissions IMO II / IMO III with SCR IMO II / IMO III with SCR
  • Aspiration Turbocharged Turbocharged
  • Bore 12.6 in 320.0 mm
  • Stroke 18.9 in 480.0 mm
  • Rotation from Flywheel End Counterclockwise/Clockwise Counterclockwise/Clockwise
  • Configuration 6,8,9 Cylinder 6,8,9 Cylinder
  • Swept Volume 2257.88 in³ 37.0 l

Dimensions & Weights

  • Minimum Dry Weight 82673.4 lb 37.5 ton (US)
  • Minimum Length 238.4 in 6055.0 mm
  • Maximum Length 309.1 in 7850.0 mm
  • Minimum Height 152.0 in 3862.0 mm
  • Maximum Height 173.5 in 4406.0 mm
  • Minimum Width 86.4 in 2195.0 mm
  • Maximum Width 86.4 in 2195.0 mm


For IMO III emissions the MaK M 32 E is delivered with a Scheme A factory certified SCR solution and a factory EIAPP certificate, simplifying installation and commissiong work significantly. Caterpillar's SCR technology minimizes total cost of ownership by cutting the diesel and urea expenses by offering the lowest total fluid consumption at optimized engine and SCR life time.

Nodular cast-iron engine block with integrated ducts for lubricating oil and charge air.

Installation friendly, due to pumps and filters installed on the engine

M 32 E as a generator drive

The robust design and moderate speed permits unlimited, continuous operation with heavy fuel oil. Engine and electrics are tested prior to delivery.

M 32 E Standard Equipment

Air Inlet System

  • Air intake silencer/filter

Control System

  • Load sharing unit (for multiple engine plant only)
  • Modular Alarm Control and Protection System (MACS)
  • Serial link interface (MODbus / canbus)
  • Speed governor

Cooling System

  • 2-stage charge air cooler
  • Electronic cooling water preheater
  • HT cooling water pump (engine driven)

Exhaust System

  • Exhaust gas expansion joint
  • Exhaust gas insulated manifolds
  • Turbocharger at flywheel end

Fuel System

  • Fuel circulating pump (attached / for MDO/MGO only)
  • Fuel indicator filter
  • Fuel pressure valve (attached / for MDO/MGO only)


  • Local control panel
  • Pressure and temperature indicator

Lube System

  • Dry sump
  • Lube oil plate cooler (separate)
  • Lube oil pump (engine driven)
  • Lube oil safety filter
  • Lube oil self-cleaning filter
  • Pressure regulating valve

Mounting System

  • High flexible coupling
  • Rigid mounting

Starting System

  • Electrical barring device
  • Starting air valve


  • Lifting device (rental)
  • Torsional Vibration Calculation (TVC)

M 32 E Optional Equipment

Air Inlet System

  • Air inlet shut-off valve
  • Air inlet transition piece
  • Expansion joint
  • Silencer/filter

Control System

  • Air injection control (for better load acceptance)
  • Electronic speed governor cabinet
  • Engine alarm system
  • Remote control system
  • Remote indicators (start air pressure, engine speed, etc.)
  • Starter for electric driven pumps
  • 24 DC UPS

Cooling System

  • FW/SW plate cooler
  • HT cooling water pump (electric driven)
  • LT cooling water pump (electric driven)
  • Sea water cooling pump (electric driven)
  • Steam / thermal oil cooling water preheater
  • Temperature control valve

Exhaust System

  • Silencer (with or without spart arrester)
  • Turbocharger at counter-flywheel side

Fuel System

  • Fuel oil cooler
  • HFO final preheater
  • HFO pressure regulating valve
  • HFO self-cleaning automatic filter
  • HFO supply and booster pumps (electrical driven)
  • HFO treatment and supply modules
  • HFO viscosity control device
  • Mixing tank

Lube System

  • Lube oil centrifuge
  • Lube oil pump (electrical driven)
  • Lube oil treatment and combined modules
  • Pre-lubricating oil pump (electrical driven)
  • Temperature control valve
  • Wet sump with dip stick

Mounting System

  • Flexible pipe connections
  • Resilient mounting

Starting System

  • Starting air compressor
  • Starting air receiver


  • Cat Propulsion Systems
  • Engine PTO coupling
  • Part load optimization kit for constant speed engine (SFOC improvement, smoke reduction)
  • Part load optimization kit for variable speed engine (massive SFOC improvement,…)
  • PTO alternator
  • PTO shaft on counter-flywheel side
  • Reduction gear
  • Reduction gear PTO coupling

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