C18 Tier 2

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Power Rating

Minimum Rating 404.0 bhp 301.0 bkW Less
Maximum Rating 806.0 bhp 601.0 bkW Less

Engine Specifications

Aspiration Turbocharged-Aftercooled Turbocharged-Aftercooled Less
Rotation (from flywheel end) Counterclockwise Counterclockwise Less
Stroke 7.2 in 183.0 mm Less
Displacement 1106.0 in3 18.1 L Less
Configuration In-Line 6, 4-Stroke-Cycle-Diesel In-Line 6, 4-Stroke-Cycle-Diesel Less
Bore 5.7 in 145.0 mm Less

Dimensions & Weights

Minimum Dry Weight 3900.0 lb 1769.0 kg Less
Maximum Dry Weight 4200.0 lb 1905.0 kg Less
Minimum Length 59.23 in 1506.0 mm Less
Maximum Width 42.9 in 1090.0 mm Less
Minimum Height 45.08 in 1145.0 mm Less
Maximum Height 47.2 in 1273.0 mm Less
Minimum Width 41.2 in 1047.0 mm Less
Maximum Length 81.03 in 2058.0 mm Less

Aftercooling System

C18 ACERT auxiliary engines now incorporate a separate circuit aftercooling system (SCAC) for all configurations with A through D ratings


EPA Tier 3 compliant for select ratings & IMO II and EU IWW compliant for all ratings

Single turbo configurations for all ratings

Competitive size & weight

All major MCS type approvals available from factory

C18 Tier 2 Standard Equipment

Air Inlet System
  • Corrosion-resistant sea water aftercooler core, air cleaner/fumes disposal (closed system), jacket water cooled turbocharger, turbocharger inlet OD straight connection

Control System
  • Electronic governing (A4 ECU), electronic throttle position sensor, programmable low idle, electronic diagnostics and fault logging, fuel/air ratio control

Cooling System
  • Gear-driven jacket water pump, block heater, 1500W, 120V AC current; gear-driven, bronze impeller, sea water pump; separate circuit keel cooling or titanium plate heat exchanger (with expansion tank and coolant recovery system)

Exhaust System
  • Watercooled exhaust manifold and turbocharger, ID round-flanged outlet

Fuel System
  • Fuel filter, RH service on port, LH service on starboard; fuel transfer pump; fuel priming pump; flexible fuel lines

Lube System
  • Crankcase breather; oil cooler; oil filler; spinon oil filter, RH or LH service; center sump shallow oil pan; dipstick, RH service on port, LH service on starboard; gear-driven oil pump

Mounting System
  • Front support — adjustable

Power Take-Offs
  • Hydraulic pump drive, SAE A, 11 tooth spline, 46 ft-lbs. max. torque, counterclockwise as viewed from the front of the engine looking into the drive, turning 1.41 times engine speed; crankshaft pulley, 292 mm (11.5 in) twogroove, 15.88 mm (.63 in) wide

Protection System
  • Shutdown — electronic, 12 or 24V

  • Torsional vibration damper, lifting eyes, variable engine wiring, RH or LH service options, literature, upper rear-facing customer wiring connector, service tool connection, electronic installation kit

ISO Certification
  • Factory-designed systems built at Caterpillar ISO 9001:2000 certified facilities.

C18 Tier 2 Optional Equipment

Air Inlet System
  • Aftercooler condensate drain

Charging System
  • Battery charger, 10 amp; charging alternators, 24V, 60 amp, RH or LH; ammeter gauge, 24V

Exhaust System
  • Dry elbows, watercooled elbows, flexible fitting, exhaust outlet flange

Fuel System
  • Fuel cooler, duplex fuel filter, primary fuel/water separator

  • Wiring for multiple stations of Marine Power Display (MPD); gauges and instrument panels; wiring group (MPD); digital tachometer, magnetic pickup; MPD system

Lube System
  • Manual sump pumps, duplex oil filters, deep sump oil pan

Power Take-Offs
  • Crankshaft pulleys and damper, stub shafts

Starting System
  • Air starting motor, air start accessories (air pressure regulator and air start silencer), electric starting motors, jacket water heater — 240V, battery sets — 24V (dry)

  • Bilge pump drive, damper guards, tool set, wiring harness removal, filter cover kit, tool set

  • Optional literature (other languages than English), extra literature (English and other languages)

  • Overseas preservation, engine protective cover, storage preservation, export packing

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Extended Warranty and Support

Caterpillar offers a variety of integrated solutions to help you protect your investment, minimize owning and operating costs, and maximize up-time.

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