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Mitsubishi L3E Engine

General Technical Data

Engine Specifications

Engine Model ............... Mitsubishi L3E
Engine Type ............... 4-cycle inline 3-cylinder indirect injection liquid-cooled diesel
Number of Cylinders ............... 3
Cylinder Arrangement ............... In-line
Engine Bore, in (mm) ............... 2.99 (76.0)
Engine Stroke, in (mm) ............... 2.76 (70.0)
Displacement, cu.in (L) ............... 58.1 (0.952)
Rated Engine Power, hp (kW) ............... 9.4-23.7 (7.0-17.7)
Rated Engine Speed, rpm ............... 1500-3600
Peak Torque ............... 42.0-49.4 lb-ft (57.0-67.0 Nm) at 1900-2200 rpm
Low Idle Speed, rpm ............... 900-1000
High Idle Speed, rpm ............... 3200-3800
Aspiration Type ............... Naturally Aspirated
Standard Operating Speed, rpm ............... 1500-3000
Compression Ratio ............... 23.0:1
Firing Order ............... 1-3-2
Engine Rotation Direction ............... Counter-clockwise facing flywheel end
Internal Breather Type ............... Crankcase integrated closed valve type
Cylinder Block Type ............... Ribbed thin-wall cast iron monoblock
Cylinder Head Type ............... Cross-flow cast iron single piece
Combustion Chamber ............... Swirl chamber pre-combustion type
Lubrication System ............... Forced circulation pressure feed
Oil Pump Type ............... Trochoid gear-driven pump
Oil Filter Type ............... Full-flow cartridge spin-on
Cooling System ............... Forced liquid circulation with thermostat bypass
Water Pump Type ............... Belt-driven centrifugal impeller
Air Cleaner Type ............... Dry element dual-stage safety filter
Emission Compliance ............... EU Stage V and Tier 4 Final
Starting System ............... Electric motor starter
Electrical System Voltage, V ............... 12
Alternator Capacity, A ............... 40

Fuel System

Fuel Injection Pump Type ............... Bosch style in-line MD pump-line-nozzle
Fuel Feed Pump Type ............... Mechanical diaphragm type or electric plunger type
Fuel Injection Nozzle Type ............... Throttle type pin-nozzle
Fuel Filter Type ............... Cartridge spin-on element with integrated water separator
Fuel Supply Line Outer Diameter, in (mm) ............... 0.31 (8.0)
Fuel Return Line Outer Diameter, in (mm) ............... 0.24 (6.0)
Standard Injection Timing, deg BTDC ............... 16-18
Injection Pressure, psi (MPa) ............... 1991-2132 (13.7-14.7)
Maximum Fuel Injection Pump Delivery Pressure, psi (MPa) ............... 4267 (29.4)
Fuel Oil Specification ............... ASTM D975 No. 2-D or JIS K2204 gas oil No. 2
Fuel Consumption at 100% Load, lb/hp-h (g/kW-h) ............... 0.44-0.48 (270-290)
Fuel Injection Pipe Wall Thickness, in (mm) ............... 0.08 (2.0)
Fuel Injection Pipe Inner Diameter, in (mm) ............... 0.06 (1.5)
Governor Type ............... Mechanical centrifugal all-speed type
Governor Linkage Play Clearance, in (mm) ............... 0.004-0.012 (0.1-0.3)
Fuel Overflow Valve Opening Pressure, psi (MPa) ............... 21.3-28.4 (0.15-0.20)
Maximum Allowable Fuel Inlet Restriction, in Hg (kPa) ............... 3.94 (13.3)

Dimensions and Weight

Overall Length, in (mm) ............... 20.7 (525)
Overall Width, in (mm) ............... 16.5 (420)
Overall Height, in (mm) ............... 19.7 (500)
Dry Weight with Radiator, lbs (kg) ............... 192 (87)
Dry Weight (Engine Only), lbs (kg) ............... 183 (83)

Maintenance Data

Service Information

Compression Pressure, Standard, psi (MPa) ............... 427 (2.94)
Compression Pressure, Minimum, psi (MPa) ............... 341 (2.35)
Max Pressure Variance Between Cylinders, psi (MPa) ............... 35.6 (0.25)
Oil Pressure at Low Idle, psi (MPa) ............... 7.11 (0.05)
Oil Pressure at Rated Speed, psi (MPa) ............... 28.4-56.9 (0.20-0.40)
Standard Coolant Temperature, F (C) ............... 167-194 (75-90)
Thermostat Opening Temperature, F (C) ............... 160 (71)
Thermostat Full-Open Temperature, F (C) ............... 185 (85)
Fan Belt Deflection under 22 lb Force, in (mm) ............... 0.39-0.47 (10.0-12.0)
Intake Valve Clearance, in (mm) ............... 0.0098 (0.250)
Exhaust Valve Clearance, in (mm) ............... 0.0098 (0.250)

Engine Oil and Coolant

Engine Oil Type .................. SAE 10W-30, SAE 15W-40
API Service Classifications ......................... CF-4, CG-4, or CH-4
Engine Oil Capacity (Upper Limit), qt (L) ............... 3.80 (3.60)
Engine Oil Capacity (Lower Limit), qt (L) ............... 2.43 (2.30)
Coolant Capacity (Engine Only), qt (L) ............... 1.90 (1.80)

Service Intervals

Change engine oil ............... Every 150 hours
Replace oil filter ............... Every 150 hours
Replace fuel filter ............... Every 250 hours
Service air filter ............... Every 100 hours
Replace air filter ............... Every 500 hours
Change coolant ............... Every 1000 hours
Valve-lash adjustment ............... Every 500 hours
Check fuel system ............... Every 500 hours
Compression test ............... Every 1000 hours
Clean radiator fin ............... Every 100 hours
Belt inspection ............... Every 100 hours

Service Specifications

Cylinder Bore Inside Diameter, in (mm) ............... 2.9921 (76.000)
Cylinder Bore I.D Maximum Wear Limit, in (mm) ............... 2.9980 (76.150)
Cylinder Bore Maximum Out-of-Round, in (mm) ............... 0.0004 (0.010)
Cylinder Block Top Surface Flatness, in (mm) ............... 0.0020 (0.050)
Connecting Rod Small End Bushing I.D, in (mm) ............... 0.8665 (22.010)
Connecting Rod Big End I.D, in (mm) ............... 1.8110 (46.000)
Connecting Rod Bearing Clearance, in (mm) ............... 0.0012-0.0028 (0.030-0.070)
Crankshaft Main Journal Outer Diameter, in (mm) ............... 1.9685 (50.000)
Crankpin Journal Outer Diameter, in (mm) ............... 1.6929 (43.000)
Crankshaft Main Bearing Clearance, in (mm) ............... 0.0012-0.0028 (0.030-0.070)
Crankshaft Axial End Play, in (mm) ............... 0.0020-0.0118 (0.050-0.300)
Piston Skirt Outer Diameter, in (mm) ............... 2.9898 (75.940)
Piston Outer Diameter, in (mm) ............... 2.9823 (75.750)
Piston-to-Cylinder Bore Clearance, in (mm) ............... 0.0020-0.0031 (0.050-0.080)
Piston Pin Bore Inside Diameter, in (mm) ............... 0.8661 (22.000)
Piston Pin Outer Diameter, in (mm) ............... 0.8659 (21.995)
Piston Pin-to-Piston Pin Bore Clearance, in (mm) ............... 0.0001-0.0004 (0.002-0.010)
Top Ring Groove Width, in (mm) ............... 0.0787 (2.000)
Second Ring Groove Width, in (mm) ............... 0.0591 (1.500)
Oil Ring Groove Width, in (mm) ............... 0.1575 (4.000)
Top Ring Side Clearance, in (mm) ............... 0.0024-0.0039 (0.060-0.100)
Second Ring Side Clearance, in (mm) ............... 0.0020-0.0035 (0.050-0.090)
Oil Ring Side Clearance, in (mm) ............... 0.0008-0.0024 (0.020-0.060)
Top Ring End Gap in (mm) ............... 0.0059-0.0118 (0.150-0.300)
Second Ring End Gap, in (mm) ............... 0.0059-0.0118 (0.150-0.300)
Oil Ring End Gap, in (mm) ............... 0.0079-0.0157 (0.200-0.400)
Cylinder Head Bottom Surface Distortion Flatness, in (mm) ............... 0.0020 (0.050)
Intake Valve Stem Outer Diameter, in (mm) ............... 0.2598 (6.600)
Exhaust Valve Stem Outer Diameter, in (mm) ............... 0.2579 (6.550)
Intake Valve-to-Guide Stem Clearance, in (mm) ............... 0.0012-0.0024 (0.030-0.060)
Exhaust Valve-to-Guide Stem Clearance, in (mm) ............... 0.0020-0.0033 (0.050-0.085)
Valve Guide Bushing Inner Diameter, in (mm) ............... 0.2618 (6.650)
Valve Seat Angle, deg ............... 45
Valve Margin Width, in (mm) ............... 0.0394 (1.000)
Intake Valve Sinkage Depth, in (mm) ............... 0.0276-0.0354 (0.700-0.900)
Exhaust Valve Sinkage Depth, in (mm) ............... 0.0276-0.0354 (0.700-0.900)
Valve Spring Free Length, in (mm) ............... 1.4803 (37.600)
Camshaft Journal Outer Diameter (Front), in (mm) ............... 1.4961 (38.000)
Camshaft Journal Outer Diameter (Center), in (mm) ............... 1.4567 (37.000)
Camshaft Journal Outer Diameter (Rear), in (mm) ............... 1.4173 (36.000)
Cam Lobe Height (Intake), in (mm) ............... 1.3283 (33.740)
Cam Lobe Height (Exhaust), in (mm) ............... 1.3283 (33.740)
Camshaft Axial End Play, in (mm) ............... 0.0020-0.0098 (0.050-0.250)
Rocker Arm Shaft Outer Diameter, in (mm) ............... 0.4724 (12.000)
Rocker Arm Bushing Inner Diameter, in (mm) ............... 0.4736 (12.030)
Rocker Arm Bushing-to-Shaft Clearance, in (mm) ............... 0.0004-0.0028 (0.010-0.070)

Tightening Torques

Cylinder Head Bolt, lb-ft (Nm) ............... 54.2-61.5 (73.5-83.4)
Connecting Rod Cap Nut, lb-ft (Nm) ............... 23.1-26.8 (31.4-36.3)
Main Bearing Cap Bolt, lb-ft (Nm) ............... 36.2-43.4 (49.0-58.8)
Flywheel Bolt, lb-ft (Nm) ............... 61.5-68.7 (83.4-93.2)
Crankshaft Pulley Center Nut, lb-ft (Nm) ............... 72.3-86.8 (98.0-117.7)
Camshaft Thrust Plate Bolt, lb-ft (Nm) ............... 5.8-8.7 (7.8-11.8)
Rocker Arm Shaft Bracket Bolt, lb-ft (Nm) ............... 10.8-14.5 (14.7-19.6)
Rocker Arm Lock Nut, lb-ft (Nm) ............... 10.8-14.5 (14.7-19.6)
Timing Gear Case Cover M6 Bolt, lb-ft (Nm) ............... 5.8-8.7 (7.8-11.8)
Timing Gear Case Cover M8 Bolt, lb-ft (Nm) ............... 10.8-14.5 (14.7-19.6)
Oil Pump Cover Plate Screw, lb-ft (Nm) ............... 4.3-6.5 (5.9-8.8)
Oil Pan Mounting Bolt, lb-ft (Nm) ............... 5.8-8.7 (7.8-11.8)
Oil Pan Drain Plug, lb-ft (Nm) ............... 28.9-36.2 (39.2-49.0)
Fuel Pump Delivery Valve Holder, lb-ft (Nm) ............... 25.3-28.9 (34.3-39.2)
Fuel Pump Mounting M6 Bolt, lb-ft (Nm) ............... 5.8-8.7 (7.8-11.8)
Fuel Pump Mounting M8 Bolt, lb-ft (Nm) ............... 10.8-14.5 (14.7-19.6)
Fuel Injection Nozzle Assembly to Head, lb-ft (Nm) ............... 36.2-43.4 (49.0-58.8)
Fuel Injection Nozzle Retaining Nut, lb-ft (Nm) ............... 25.3-28.9 (34.3-39.2)
Fuel Injection Pipe Joint Nut, lb-ft (Nm) ............... 18.1-21.7 (24.5-29.4)
Fuel Leak-off Pipe Nut, lb-ft (Nm) ............... 18.1-21.7 (24.5-29.4)
Glow Plug Mounting, lb-ft (Nm) ............... 10.8-14.5 (14.7-19.6)
Glow Plug Connector Terminal Nut, lb-ft (Nm) ............... 0.7-1.1 (1.0-1.5)
Water Pump Mounting M6 Bolt, lb-ft (Nm) ............... 5.8-8.7 (7.8-11.8)
Water Pump Mounting M8 Bolt, lb-ft (Nm) ............... 10.8-14.5 (14.7-19.6)
Thermostat Housing Bolt, lb-ft (Nm) ............... 10.8-14.5 (14.7-19.6)
Inlet Manifold Fastener, lb-ft (Nm) ............... 5.8-8.7 (7.8-11.8)
Exhaust Manifold Fastener, lb-ft (Nm) ............... 14.5-18.1 (19.6-24.5)
Starter Motor Mounting Bolt, lb-ft (Nm) ............... 28.9-36.2 (39.2-49.0)
Alternator Mounting Bracket Bolt, lb-ft (Nm) ............... 14.5-18.1 (19.6-24.5)
Alternator Adjusting Plate Bolt, lb-ft (Nm) ............... 10.8-14.5 (14.7-19.6)
Oil Pressure Switch Installation, lb-ft (Nm) ............... 7.2-10.8 (9.8-14.7)
Water Temperature Gauge Unit, lb-ft (Nm) ............... 14.5-21.7 (19.6-29.4)
Flywheel Housing Mounting M8 Bolt, lb-ft (Nm) ............... 14.5-18.1 (19.6-24.5)
Flywheel Housing Mounting M10 Bolt, lb-ft (Nm) ............... 28.9-36.2 (39.2-49.0)
Rear Oil Seal Case Bolt, lb-ft (Nm) ............... 5.8-8.7 (7.8-11.8)
Idler Gear Shaft Bolt, lb-ft (Nm) ............... 14.5-18.1 (19.6-24.5)
Torque Spring Lock Nut, lb-ft (Nm) ............... 18.1-25.3 (24.5-34.3)
Speed Control Lever Nut, lb-ft (Nm) ............... 4.3-6.5 (5.9-8.8)
Stop Lever Nut, lb-ft (Nm) ............... 4.3-6.5 (5.9-8.8)
Governor Housing Bolt, lb-ft (Nm) ............... 5.8-8.7 (7.8-11.8)

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• Mitsubishi Engines Specs
  
• Mitsubishi L2C Specs
  
• Mitsubishi L2E Specs
  
• Mitsubishi L3A Specs
  
• Mitsubishi L3C Specs
  

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