Cat® C27 ACERT™ Diesel Engine

  • Overview


It may be big, but the power-dense Cat C27 is a fully-configurable common core engine that makes installation across a wide variety of applications simple. With options like rear-mounted turbos and engine-mounted aftertreatment, it’s now easier than ever to install. And becuase the C27 is DEF-free, there’s even more room to maneuver under the hood.

Advanced Features

Say goodbye to DEF, thermal management and engine regeneration with the Cat C27. Thanks to advances in Caterpillar’s technology, the larger-than-life engine is practically maintenance free.

Ideal Applications

Industrial and construction applications such as: Dredges
 • Chippers
 • Grinders
 • Emergency water pumps
 • Rock drills

Total Cost of Ownership

Carefully crafted for efficiency, the Cat C27 fuel consumption is optimized to meet the demanding operating cycles of just about any machine. And with no DEF to worry about, owners can save on parts and maintence costs while also remaining maintenance-free for the life of the engine.

Cat Dealer Product Support

Reliable dealer service and support, scheduled maintenance and an included warranty: it’s what Cat C27 owners can expect with their new engine. See your Cat dealer for details.


Featuring a clean emissions module, the Cat C27 uses DOC, DPF and SCR technologies to keep the engine—and the air around it—cleaner, not only making for a more efficient machine, but also a safer job site.

Power Rating
Maximum Power 783 kW (1050 HP)
Maximum Torque 4674 Nm @ 1200 rpm (3448 lb-ft @ 1200 rpm)
Rated Speed 1800 rpm
Minimum Power 597 kW (800 HP)
Emission Standards
Emissions U.S. EPA Tier 4 Final
Engine Configuration V-12
Bore 137.2 mm (5.4 in)
Stroke 152.4 mm (6 in)
Displacement 27 l (1649.5 inu00b3)
Compression Ratio 16.0:1
Aspiration Twin Turbocharged-Aftercooled (TTA)
Combustion System Direct Injection
Rotation from Flywheel End Counterclockwise
Aftertreatment DOC
Engine Dimensions - Approximate
Length 1874 mm (73.8 in)
Width 1600 mm (63 in)
Height 1370 mm (53.9 in)
Weight - Net Dry - Basic Operating Engine Without Optional Attachments 3004 kg (6625 lb)

Standard Equipment

  • Air Inlet System
    • Turbocharged
    • Air-to-Air Aftercooled
  • Control System
    • Electronic control system
    • Over-foam wiring harness
    • Automatic altitude compensation
    • Power compensated for fuel temperature
    • Configurable software features
    • Engine monitoring system SAE J1939 broadcast and control
  • Cooling System
    • Thermostats and housing, vertical outlet
    • Jacket water pump, centrifugal
    • Water pump, inlet
  • Exhaust System
    • Exhaust manifold, dry
    • Optional exhaust outlet
  • Flywheels and Flywheel Housing
    • Choice of SAE No. 0 or SAE No. 1 flywheel housing
  • Fuel System
    • MEUI injection
    • Fuel filter, secondary (2 micron)
    • Fuel transfer pump
    • Electronic fuel priming
  • Lube System
    • Open crankcase ventilation system
    • Oil cooler
    • Oil filler
    • Lube oil filter
    • Rear sump oil pan
    • Oil dipstick
    • Gear driven oil pump
  • General
    • Paint: Caterpillar yellow, with optional colors available at request
    • Vibration damper
    • Lifting eyes

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