Engine Caterpillar C18

Engine Caterpillar C18

Industrial CAT C18 engine manufactured by Caterpillar (USA) – 6-cylinder, in-line, 4-stroke, direct fuel injection, turbocharged with air-to-air aftercooling system, electronic control unit (ADEM ™ A4), MEUI fuel system.

Engine power Caterpillar C18 – 700-1130 HP at a crankshaft rotation speed of 1500 rpm. The engine meets Tier 3 (US EPA) and Stage IIIA (European Union requirements) emission standards using Advanced Combustion Emissions Reduction Technology (ACERT). It covers 4 systems to reduce the toxicity of exhaust gases and covers:

  • fuel system;
  • fuel combustion process;
  • clean air intake system;
  • implementation of an electronic control and management system.

Power characteristics depend on engine modification:

  • Caterpillar C18 ATAAC — 535 kW or 727 hp;
  • Caterpillar C18 — 597 kW or 812 hp;
  • Caterpillar C18 ATAAC2 — 775 kW or 1054 hp;
  • Caterpillar C18 ATAAC3 — 831 kW or 1130 hp


Number of cylinders 6
Configuration inline
Firing order 1-5-3-6-2-4
Cylinder bore, mm 145
Piston stroke, mm 183
Displacement, cc 18,1
Compression Ratio 16.3:1
Fuel pump low pressure
Fuel filters
— rough cleaning
— fine cleaning
top quality, 2 microns
Turbine turbocharging with air-to-air cooling system
Oil filters full-flow, with replaceable filter element
Cooling system two-circuit system, with an additional circuit for cooling the charge air
Water pump centrifugal water pump, water pump inlet
Cooling system volume, liters 21,9
Dimensions, mm (LxWxH) 1388,2х920,7х1242,8
Weight, kg 1565 (dry weight)

Advantages of the Caterpillar C18 ACERT diesel engine

  • Narrow rings fitted to the Monotherm piston and tighter manufacturing tolerances ensure superior assembly performance.
  • Lower fuel consumption results in lower operating costs and lower emissions.
  • The MEUI fuel system is highly reliable due to its special design.
  • Redesigned cranks are stronger and more secure.

Caterpillar® C-18 automotive engines are designed for normal operation on road vehicles up to 65 tonnes. To obtain a balanced vehicle performance and fuel consumption for the C-18 engine, select axle and tire specifications such that the following condition is met:

  • 1450 – 1550 min-1 at a speed of 90 km / h.

Caterpillar C18

When at least one of the following conditions is present, extra care should be taken when selecting the proper transmission and axle characteristics:

  1. Poor road surface;
  2. Elevation angles – 8% or more;
  3. Gross vehicle weight exceeds 65 tons.

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