G3508 Low Emission Gas Compression Engine


Meets U.S. EPA Spark Ignited Stationary NSPS Emissions for 2007/8

Advanced Digital Engine Management

ADEM A3 control system providing integrated ignition, speed governing, protection, and controls, including detonation-sensitive variable ignition timing. ADEM A3 has improved: user interface, display system, shutdown controls, and system diagnostics.

Lean Burn Engine Technology

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.

Ease of Operation

Side covers on block allow for inspection of internal components

Full Range of Attachments

Large variety of factory-installed engine attachments reduces packaging time


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

Gas Engine Rating Pro

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.

Product Support Offered Through Global Cat Dealer

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 80 Years of Engine Manufacturing Experience

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

Web Site

For all your petroleum power requirements, visit www.catoilandgasinfo.com.

Web Site

For all your petroleum power requirements, visit www.catoilandgasinfo.com.

Engine Specifications
Maximum Rating 500 bkW (670 BHP)
Emissions NSPS Site Compliant Capable or Non-regulated
Minimum Rating 391 bkW (524 BHP)
Ignition, Protection ADEM™ A3
Air/Fuel Ratio Control ADEM™ A3
Displacement 34.5 l (2105 inu00b3)

Standard Equipment

  • Air Inlet System
    • Remote air inlet adapters
  • Charging System
    • Battery chargers
  • Cooling System
    • Jacket water thermostats and housing — full open temperature 98°C (208°F)
    • Jacket water pump — gear driven, centrifugal, non-self-priming
    • Aftercooler water pump — gear driven, centrifugal, non-self-priming
    • Aftercooler core for sea-air atmosphere
    • Aftercooler thermostats and housing — full open temperature 35°C (95°F)
    • Aftercooler — raw water, cleanable
  • Exhaust System
    • Exhaust manifolds — watercooled
  • Flywheels & Flywheel Housings
    • SAE No. 00 flywheel
    • SAE No. 00 flywheel housing
    • SAE standard rotation
  • Fuel System
    • Gas pressure regulator
    • Natural gas carburetor
    • Fuel gas shut-off valve (24V DC)
  • Instrumentation
    • Advisor panel
    • Advisor interconnect harness
  • Lubrication System
    • Crankcase breathers — top mounted
    • Oil cooler
    • Oil filter — RH
    • Oil pan — shallow
    • Oil sampling valve
    • Turbo oil accumulator
  • Mounting System
    • Rails, engine mounting
  • Power Take-Offs
    • Front housing — two-sided
    • Front lower LH accessory drive
  • Protection System
    • Electronic shutoff system
    • Gas shutoff valve
  • General
    • Paint — Cat yellow
    • Vibration damper and guard

Optional Equipment

  • Air Inlet System
    • Remote air inlet adapters
  • Charging System
    • Battery chargers
  • Cooling System
    • Aftercooler core
    • Thermostatic valves
    • Connections
    • Expansion and overflow tank
    • Water level switch gauge
  • European Certifications
    • European Union certifications
  • Exhaust System
    • Flexible fittings
    • Elbows
    • Flanges
    • Flange and exhaust expanders
    • Mufflers
  • Fuel System
    • Fuel filter
  • Instrumentation
    • Customer communication modules
  • Lubrication System
    • Oil filters — duplex
    • Oil pan drain
    • Oil level regulator
    • Sump pumps
    • Lubricating oil
  • Mounting System
    • Rails
    • Vibration isolators
  • Power Take-Offs
    • Auxiliary drive shaft
    • Auxiliary drive pulleys
    • Front stub shaft
    • Pulleys
  • Protection System
    • Gas valve
    • Explosion relief valves
  • Starting System
    • Air pressure regulator
    • Air silencer
    • JW heaters
    • Battery sets (24-volt dry)
    • Battery accessories
  • General
    • Flywheel guard removal
    • Engine barring group
    • Premium 8:1 pistons

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