C11 ACERT™ (Dry Manifold)

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Maximum Rating450 BHP (336 bkW)
EmissionsEPA and CARB Non-Road Mobile Tier 3, EU Stage IIIA, IMO II
Displacement681 in³ (11.15 l)
Minimum Rating325 BHP (242 bkW)
Cat C11 ACERT engines are the ideal solution for your demanding operations in the oilfield. Decades of field operation and intense research and development allow Cat C11 ACERT engines to deliver excellent performance with low operating costs and emissions. Equipment powered by C11 ACERT engines include workover rigs, pump skids, acidizing units, cementing units, and hydraulic power units. Cat engines are backed by the worldwide network of Cat dealers ready to support your operation with technical support, service, parts, and warranty. C11 ACERT engines, with ratings: 242-336 bkW (325-450 bhp) @ 1800-2100 rpm, meet China Stage II, EPA Tier 3 equivalent, EU Stage IIIA equivalent emission standards. They are available using U.S. EPA and EU Flexibility, and for other regulated and non-regulated areas.


Maximum Rating450 BHP (336 bkW)
EmissionsEPA and CARB Non-Road Mobile Tier 3, EU Stage IIIA, IMO II
Displacement681 in³ (11.15 l)
Minimum Rating325 BHP (242 bkW)
Length47.3 in (1201 mm)
Width41.6 in (1057 mm)
Height46.3 in (1176 mm)
Weight1967 lb (892.22 kg)
Governor and ProtectionElectronic (ADEM™ A3)
Flywheel and Flywheel HousingSAE 1 or SAE 2
Flywheel Teeth113 (SAE 1), 138 (SAE 2)
Rotation from Flywheel EndCounterclockwise
Stroke5.51 in (140 mm)
Bore5.12 in (130 mm)
Lube Oil System - Refill9 gal (US) (34 l)

Benefits and Features

For any petroleum application, trust Caterpillar to meet your project needs with custom factory generator sets and mechanical packages. Cat engines, generators, controls, radiators, and transmissions can be custom designed and matched in collaboration with our local dealers to create unique solutions. Custom packages are globally supported and are covered by a one year warranty after startup.

Caterpillar has a full line of engine-transmission packages that can be fully integrated with your axle, hydraulics, and operator interface. Cat transmissions deliver continuous operation under full load, smooth shifting at any speed, and maximum up time, with unmatched durability and easy maintenance.

Large variety of factory-installed engine attachments reduces packaging time

Every engine is full-load tested to ensure proper engine performance.

  • More than 2,200 dealer outlets
  • Cat factory-trained dealer technicians service every aspect of your petroleum engine
  • Cat parts and labor warranty
  • Preventive maintenance agreements available for repair before-failure options
  • S·O·Sprogram matches your oil and coolant samples against Caterpillar set standards to determine: Internal engine component condition, Presence of unwanted fluids, Presence of combustion by-product

Ownership of these manufacturing processes enables Caterpillar to produce high quality, dependable products.

For all your petroleum power requirements, visit cat.com/oilandgas.

Standard Equipment

  • Turbocharger, mid-mounted
  • Air inlet elbow 90°, 104.5 mm (4.11" OD) hose connection
  • Electronic governing, PTO speed control
  • Programmable ratings
  • Cold mode start strategy
  • Automatic altitude compensation
  • Power compensation for fuel temperature
  • Programmable low and high idle and TEL
  • Electronic diagnostics and fault logging
  • Engine monitoring system — speed, temperature, pressure
  • J1939 Broadcast — diagnostic and engine status
  • Thermostats and housing
  • Jacket water pump — gear-driven
  • Front water pump inlet
  • Exhaust manifold — dry
  • Front turbo exhaust
  • Electronic unit injector
  • Fuel filter — secondary, mid-mount, (LH 2 micron high performance)
  • Fuel transfer pump — front
  • Fuel priming pump — LH mid-mount
  • Crankcase breather
  • Oil cooler
  • Oil filter — RH
  • Oil pan — front sump, 40 L capacity
  • Oil filler — LH front
  • Oil dipstick — LH mid-mount
  • Oil pump
  • Oil valve sampling — on oil filter base
  • Crankshaft pulley and damper — 250 mm (9.84 in), 2 grooves 22.3 mm (.87 in) width
  • Hydraulic pump drive — SAE A, 11 tooth
  • 1.41:1 drive ratio — counterclockwise rotation (45 lb-ft capacity)
  • Vibration damper
  • Paint — Cat yellow
  • Lifting eyes
  • Automatic variable timing, electronic
  • Electronic installation kit (connectors, pins, sockets)
  • Literature
  • Flywheel housing or rear PTO
  • Throttle position sensor
  • Primary filter/water separator

Optional Equipment

  • Expansion chamber
  • Governors
  • Fittings
  • Air cleaners
  • Precleaners
  • Turbo air inlet
  • Air lines
  • Refrigerant compressor and mounting
  • Charging alternators
  • Alternator mountings
  • Alternator guard
  • Alternator accessories
  • Connection
  • Radiator — installed
  • Fan drive f/u/w Caterpillar installed radiator
  • Fan drive pulleys f/u/w customer-supplied radiators
  • Coolant conditioner
  • Water lines — pump inlet
  • Fan drive mountings
  • Fan height instructions
  • Fan adapters for suction fans
  • Fan adapters for blower fans
  • Suction fans
  • Blower fans
  • Coolant level sensor
  • Aftercooler lines
  • Muffler
  • Flexible fitting
  • Elbows
  • Straight exhaust adapter
  • Flange
  • Pipe
  • Rain cap
  • Clamp
  • Fuel lines
  • Fuel cooler
  • Fuel fitting — fuel return and supply connections
  • Flexible fuel lines
  • Gauges and instrument panels
  • Voltmeters
  • Gauge mounting
  • Ammeter
  • Oil pan
  • Oil pan drain
  • Oil level gauges
  • Oil filter — bypass
  • Oil filter — remote
  • Lubricating oil
  • Oil filler
  • Fumes disposal
  • Front and rear engine supports
  • Structural steel base
  • Crankshaft pulleys
  • Crankshaft pulley — stack-on
  • Output flange
  • Flywheel stub shaft
  • Front stub shaft
  • Hydraulic pump drive
  • Hydraulic pumps — front
  • Hydraulic pumps — rear
  • Enclosed Clutch
  • Clutch Support
  • Air shutoff
  • Air shutoff switch
  • Electric starting motors — 12 Volt, 24 Volt
  • Starting aids
  • Battery sets — 24 Volt, dry
  • Battery cable
  • Battery rack
  • Transmission cooler