G3612 Gas Engine

Gas Compression Engines G3612 A4

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Key Specs

Maximum Rating
4125 BHP
3076 bkW
NSPS Site Compliant Capable
NSPS Site Compliant Capable
15528 in³
254 l


    G3600 ADEM™4 engines provide a wide range of power options to fit your gas compression application. G3600 ADEM™4 engines bring the highest uptime in the industry and long operating intervals between overhaul. Operators that use G3600 ADEM™4 engines in their fleet enjoy virtually no unscheduled downtime, the right power for their application, the lowest operating costs, and emissions compliance. Ideal applications for G3600 ADEM™4 engines include centralized gathering stations, gas processing, transmissions, and storage applications. Cat G3612 ADEM™4 Gen 1 gas engine with ratings: 2796 bkW (3750 bhp) @ 1000 rpm and Cat G3612 ADEM™4 Gen 2 gas engine with ratings: 2015 bKW (2750bhp) @ 1000 rpm. NSPS site compliant capable.​

      Product Specifications for G3612 A4

      Maximum Rating 4125 BHP 3076 bkW
      Emissions NSPS Site Compliant Capable NSPS Site Compliant Capable
      Displacement 15528 in³ 254 l
      Minimum Rating 3750 BHP 2796 bkW
      Compression Ratio Gen 1 (9.2:1) Gen 2 (7:6:1) Gen 1 (9.2:1) Gen 2 (7:6:1)
      Aspiration Turbocharged-Aftercooled Turbocharged-Aftercooled
      Rotation from Flywheel End Counterclockwise Counterclockwise
      Flywheel Teeth 255 255
      Weight - Dry 58500 lb 26535 kg
      Oil Change Interval 5000 hours 5000 hours
      Ignition, Protection ADEM™4 ADEM™4
      Stroke 11.8 in 300 mm
      Bore 11.8 in 300 mm
      Cooling System 194 gal (US) 734 l
      Lube Oil System - Refill 272 gal (US) 1030 l

      G3612 A4 Standard Equipment

      Air Inlet System

      • Air cleaner — standard duty Inlet air adapter

      Control System

      • A4 control system — provides electronic governing integrated with air/fuel ratio control and individual cylinder ignition timing control

      Cooling System

      • Jacket water pump
      • Jacket water thermostats and housing
      • Aftercooler pump
      • Aftercooler water thermostats and housing
      • Two-stage aftercooler

      Exhaust System

      • Dry wrapped exhaust manifolds
      • Vertical outlet adapter

      Flywheel & Flywheel Housing

      • SAE standard rotation

      Fuel System

      • Gas admission valves -- electronically controlled fuel supply pressure

      Ignition System

      • A4 control system — senses individual cylinder detonation and controls individual cylinder timing

      Lube System

      • Crankcase breathers — top mounted
      • Oil cooler
      • Oil filter
      • Oil pan drain valve

      Mounting System

      • Engine mounting feet (six total)

      Protection System

      • Electronic shutoff system with purge cycle
      • Crankcase explosion relief valves
      • Gas shutoff valve

      Starting System

      • Air starting system


      • Paint — Cat yellow
      • Vibration dampers

      G3612 A4 Optional Equipment

      Air Inlet System

      • Heavy-duty air cleaner with precleaners and rain protection

      Charging System

      • 35 Amp & 65 Amp chargin alternators - CSA approved

      Exhaust System

      • Flexible bellows adapters
      • Exhaust expander
      • Weld flanges

      Fuel System

      • Fuel filter
      • Gas pressure regulator
      • Flexible connection
      • Low energy fuel system
      • Corrosive gas fuel system


      • Remote data monitoring and speed control
      • Compatible with Cat Electronic Technician (ET) and Data View
      • LCD display panel
      • Color HMI display
      • Modbus and Ethernet capable

      Lube System

      • Air or electric motor-driven prelube
      • Duplex oil filter
      • RH service
      • Lube oil makeup system

      Mounting System

      • Mounting plates (set of six)

      Power Take-Offs

      • Front stub shafts

      Starting System

      • Air pressure reducing valve
      • Natural gas starting system


      • Engine barring device
      • Damper guard

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