New | Cat C18 Auxiliary/Generator Set Engine (EPA Tier 3)

C18 ACERT auxiliary/generator set engines incorporate a separate circuit aftercooling system (SCAC) for all configurations. The primary advantage of the SCAC systsem is reduced aftercooler corrosion since no sea water circulates through the aftercooler. Many other improvements on these engines also contribute to minimizing owning and operating costs. The EPA Tier 3, IMO II, EU Stage IIIA compliant ratings are available with heat exchanger or keel cooled options. All major MCS type approvals are available from the factory.

Power Rating
Minimum Rating624.0 bhp
Maximum Rating803.0 bhp
Engine Specifications
ConfigurationIn-Line 6, 4-Stroke-Cycle Diesel
AspirationTA, TTA
Bore5.7 in
Stroke7.2 in
Displacement1106.0 in3
Rotation (from flywheel end)Counterclockwise
Dimensions & Weights
Length73.0 in
Width44.6 in
Height51.2 in
Dry Weight1950.0 lb
  • Separate circuit after-cooled (SCAC)
  • Open Crankcase Ventilation (OCV) system
  • Turbocharger, jacket water cooled
  • Turbocharger inlet, 152 mm (6 in) OD straight connection
  • Programmable low idle
  • Electronic diagnostics and fault logging
  • Electronic fuel/air ratio control
  • Engine Protection Mode for extended ambient conditions - EPA Tier 3 Ratings Only
  • 70-pin customer connector
  • Three types of throttle inputs (primary/ secondary PWM, 0-5V, 4-20mA
  • Separate Circuit After-Cooling (SCAC) for both HEX and Keel cooled engines
  • Engine JW and SCAC Shell & Tube Heat Exchangers for HEX cooled engines
  • SCAC pump, gear driven, for HEX cooled engines only
  • Jacket water pump, gear driven
  • Auxiliary water pump, gear driven
  • Sea water pump, bronze impeller, gear driven
  • SCAC and JW shunt tanks for maintaining proper pump inlet pressures
  • 152 mm (6 in) round flanged outlet
  • Water-cooled exhaust manifold & turbocharger
  • Flywheel Housing, SAE No. 0
  • Flywheel, 18 inch, 136 teeth
  • SAE standard rotation
  • Front service simplex fuel system
  • Fuel transfer pump, gear driven
  • Manual fuel priming pump
  • Hybrid fuel line design
  • Front service simplex oil system
  • Center sump oil pan:
  • Front and top service oil filler locations
  • Front service dipstick
  • Oil pump, gear driven
  • Front support - adjustable
  • Hydraulic Pump Drive
  • Crankshaft Pulleys
  • Front Stub Shaft
  • Front Enclosed Clutch
  • Front damper guard
  • Front service engine
  • Common electrical bonding point
  • Engine does not ship with zinc components
  • NOTE: These engines are for constant speed generator set applications only, and NOT to be used for variable speed applications



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