The Isuzu 4L-Series is an incredibly durable industrial diesel engine and employs many of the advantages of larger engines, such as 8L and above. Features including a closed crankcase vent system, gear driven timing train, uniting pumps, and direct injection keep this model clean, quiet, and efficient.

  • 3&4 Cylinder
  • 4 Cycle
  • Water Cooled
  • OHV
  • Vertical In-Line
  • Indirect Injected
  • New Direct Injection Engine Available with Same Footprint as IDI engines


High Output, Low Fuel Consumption and Low Emission

  • Re-entrant type combusion chamber (DI)
  • Minimized dead combusion space
  • High flow intake air port
  • Independent injection pumps
  • Minimized injection pipes
  • Optimized injection rate cam profile
  • Low friction piston rings


Light Weight and Compact Size

  • OHV
  • Full siamese cylinder block
  • One camshaft drive(Inlet valve, Exhaust valve and injection pump)


Low Noise

  • Three piece gear train
  • Small module helical gear
  • Auto thermatic piston
  • Vibration damping sheet oil pan
  • Tortional damper pulley (Option)


High Reliability and Durability

  • Steel laminate cylinder head gasket
  • Aluminum alloy bearing
  • Gear driven timing train


Easy Maintenance and Operation

  • One side maintenance (RH side)
  • Automatic bleeding of fuel system
  • Electrical shut off solenoid
  • Glow plug starting system


Take a look at all Isuzu L-Series engines by clicking them below.