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Maximum Rating5500 BHP (4101 bkW)
EmissionsNSPS Site Compliant Capable
Displacement20698 in³ (339 l)
Minimum Rating5000 BHP (3729 bkW)
G3600 A4 engines provide a wide range of power options to fit your gas compression application. G3600 A4 engines bring the highest uptime in the industry and long operating intervals between overhaul. Operators that use G3600 A4 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 A4 engines include centralized gathering stations, gas processing, transmissions, and storage applications. Cat G3616 A4 Gen 1 gas engine with ratings: 3729-3990 bkW (5000-5350 bhp) @ 1000 rpm and Cat G3616 A4 Gen 2 gas engines with ratings 4101 bKW (5500 bhp) @ 1000 rpm. NSPS site compliant capable.


Maximum Rating5500 BHP (4101 bkW)
EmissionsNSPS Site Compliant Capable
Displacement20698 in³ (339 l)
Minimum Rating5000 BHP (3729 bkW)
Compression RatioGen 1 (9.2:1) Gen 2 (7:6:1)
Rotation from Flywheel EndCounterclockwise
Flywheel Teeth255
Weight - Dry72000 lb (32659 kg)
Cooling System211 gal (US) (798 l)
Lube Oil System - Refill351 gal (US) (1329 l)
Oil Change Interval5000 hours
Ignition, ProtectionElectronic, ADEM™4
Stroke11.8 in (300 mm)
Bore11.8 in (300 mm)

Benefits and Features

Meets U.S. EPA Spark Ignited Stationary NSPS Emissions for 2010/11 with the use of an oxidation catalyst

Lean-burn engines operate with large amounts of excess air. The excess air absorbs heat during combustion reducing the combustion temperature and pressure, greatly reducing levels of NOx. Lean-burn design also provides longer component life and excellent fuel consumption

Includes engine mounted thermostats, compress oil cooler connections, jacket water and lube oil heater connections.

ADEM4 engine management system integrates speed control, air/fuel ratio control, and ignition/detonation controls into a complete engine management system. ADEM4 has improved: user interface, display system, shutdown controls, and system diagnostics.

GERP is a web-based program designed to provide site performance capabilities for Cat® natural gas engines for the gas compression industry. GERP provides engine data for your site's altitude, ambient temperature, fuel, engine coolant heat rejection, performance data, installation drawings, spec sheets, and pump curves.

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 repairbefore-failure options S•O•SSM program matches your oil and coolant samples against Caterpillar set standards to determine: - Internal engine component condition - Presence of unwanted fluids - Presence of combustion by-products - Site-specific oil change interval

Over 60 years of natural gas engine production Ownership of these manufacturing processes enables Caterpillar to produce high quality, dependable products - Cast engine blocks, heads, cylinder liners, and flywheel housings - Machine critical components - Assemble complete engine

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Standard Equipment

  • Air cleaner — standard duty
  • Inlet air adapter
  • A4 control system — provides electronic governing integrated with air/fuel ratio control and individual cylinder ignition timing control
  • Jacket water pump
  • Jacket water thermostats and housing
  • Aftercooler pump
  • Aftercooler water thermostats and housing
  • Single-stage aftercooler
  • Dry wrapped exhaust manifolds
  • Vertical outlet adapter
  • SAE standard rotation
  • Gas supply and and shut-off valves — electronically controlled fuel supply pressure
  • A4 control system — senses individual cylinder detonation and controls individual cylinder timing
  • LCD display panel — monitors engine parameters and displays diagnostic codes
  • Crankcase breathers — top mounted
  • Oil cooler
  • Oil filter
  • Oil pan drain valve
  • Engine mounting feet (six total)
  • Electronic shutoff system with purge cycle
  • Crankcase explosion relief valves
  • Gas shutoff valve
  • Air starting system
  • Paint — Cat yellow
  • Vibration dampers

Optional Equipment

  • Heavy-duty air cleaner with precleaners
  • 35 Amp & 65 Amp charging alternators – CSA approved
  • Flexible bellows adapters
  • Exhaust expander
  • Weld flanges
  • Fuel filter
  • Gas pressure regulator
  • Flexible connection
  • Flexible connection
  • 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
  • Air or electric motor-driven prelube
  • Duplex oil filter
  • Mounting plates (set of six)
  • Front stub shafts
  • Air pressure reducing valve
  • Natural gas starting system
  • Engine barring device
  • Damper guard