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Mitsubishi L2E Engine

General Technical Data

Engine Specifications

Engine Model ............... Mitsubishi L2E
Engine Type ............... 4-cycle water-cooled vertical overhead valve diesel engine
Number of Cylinders ............... 2
Cylinder Arrangement ............... In-line vertical
Engine Bore, in (mm) ............... 2.99 (76.0)
Engine Stroke, in (mm) ............... 2.76 (70.0)
Displacement, cu.in (L) ............... 38.75 (0.635)
Rated Engine Power at 3000 rpm, hp (kW) ............... 12.9 (9.5)
Rated Engine Power at 3600 rpm, hp (kW) ............... 15.1 (11.3)
Maximum Standby Power, hp (kW) ............... 13.0 (9.68)
Maximum Gross Power, hp (kW) ............... 17.0 (12.7)
Maximum Torque at 2000 rpm, lb-ft (Nm) ............... 25.8 (35.0)
Maximum Torque at 2200 rpm, lb-ft (Nm) ............... 24.5 (33.2)
Rated Engine Speed, rpm ............... 3000-3600
Low Idle Speed, rpm ............... 800-900
High Idle Speed, rpm ............... 3200-3800
Compression Ratio ............... 23:1
Firing Order ............... 1-2
Combustion Chamber ............... Swirl chamber type
Aspiration Type ............... Naturally aspirated
Direction of Rotation ............... Counterclockwise viewed from flywheel side
Cylinder Block Material ............... Cast iron
Cylinder Head Material ............... Cast iron
Piston Material ............... Aluminum alloy
Cylinder Liner Type ............... Integral cast iron linerless block
Valves Per Cylinder ............... 2 (1 intake 1 exhaust)
Valve Arrangement ............... Overhead valve (OHV)
Camshaft Location ............... Cylinder block lower section
Camshaft Drive Method ............... Gear driven by crankshaft gear
Lubrication System ............... Forced circulation by gear pump
Cooling System ............... Liquid-cooled forced circulation by centrifugal water pump
Air Cleaner Type ............... Dry paper element type
Exhaust Muffler Type ............... Industrial or residential option
Starting System ............... Electric starter motor with glow plugs
Electrical System, V ............... 12
Alternator Capacity, A ............... 40

Fuel System

Fuel Injection Pump Model ............... Bosch BFR type in-line mini pump
Fuel Injection Nozzle Model ............... Throttle type
Governor Type ............... Centrifugal mechanical weight type
Fuel Standard Specification ............... ASTM D975 number 2 diesel fuel oil
Fuel Injection Pressure, psi (bar) ............... 2030 (140)
Fuel Injection Timing, deg ............... 17 BTDC
Fuel Feed Pump Type ............... Mechanical diaphragm type or electric type option
Fuel Filter Type ............... Spin-on cartridge paper element type
Fuel Return System ............... Overflow pipe returned to fuel tank
Fuel Consumption at 100 percent Load 3000 rpm, lb/h (kg/h) ............... 5.51 (2.50)
Fuel Consumption at 75 percent Load 3000 rpm, lb/h (kg/h) ............... 4.14 (1.88)
Fuel Consumption at 50 percent Load 3000 rpm, lb/h (kg/h) ............... 2.78 (1.26)
Specific Fuel Consumption Rate, g/kWh ............... 290
Fuel Solenoid Control Type ............... Energized to run or energized to stop options
Maximum Fuel Lift Pump Suction Head, ft (m) ............... 3.28 (1.0)
Maximum Fuel Pump Inlet Restriction, in.Hg (kPa) ............... 2.95 (10.0)

Dimensions and Weight

Overall Length, in (mm) ............... 16.4 (415)
Overall Width, in (mm) ............... 16.5 (420)
Overall Height, in (mm) ............... 19.69 (500)
Dry Weight w/o Accessories, lbs (kg) ............... 155 (70)
Wet Weight with Fluids, lbs (kg) ............... 165 (75)

Maintenance Data

Service Information

Oil Pressure at Rated Speed, psi (bar) ............... 42.7-71.1 (2.94-4.90)
Oil Pressure at Low Idle Speed, psi (bar) ............... 14.2 (0.98)
Oil Pressure Switch Activation Pressure, psi (bar) ............... 7.1 (0.49)
Thermostat Opening Temperature, F (C) ............... 160 (71)
Thermostat Full Open Temperature, F (C) ............... 185 (85)
Intake Valve Clearance, Cold, in (mm) ............... 0.0098 (0.25)
Exhaust Valve Clearance, Cold, in (mm) ............... 0.0098 (0.25)

Engine Oil and Coolant

Engine Oil Type .................. SAE 10W-30, SAE 15W-40
API Service Classifications ......................... CD, CE, or CF
Engine Oil Capacity (Shallow Pan), qt (L) ............... 2.43 (2.3)
Engine Oil Capacity (Deep Pan), qt (L) ............... 3.06 (2.9)
Cooling System Capacity, qt (L) ............... 1.27 (1.2)

Service Intervals

Change engine oil ............... Every 200 hours
Replace oil filter ............... Every 200 hours
Replace fuel filter ............... Every 200 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 800 hours
Clean radiator fin ............... Every 100 hours
Belt inspection ............... Every 100 hours

Service Specifications

Cylinder Bore Inner Diameter, in (mm) ............... 2.9921-2.9933 (76.000-76.030)
Cylinder Bore Out of Roundness, in (mm) ............... 0.0004 (0.010)
Connecting Rod Small End Bushing I.D, in (mm) ............... 0.7877-0.7884 (20.008-20.025)
Connecting Rod Center to Center Length, in (mm) ............... 4.0551 (103.00)
Connecting Rod Big End Side Clearance, in (mm) ............... 0.0039-0.0138 (0.100-0.350)
Connecting Rod Bearing Clearance, in (mm) ............... 0.0008-0.0024 (0.020-0.062)
Crankshaft Main Journal Outer Diameter, in (mm) ............... 1.6917-1.6925 (42.970-42.990)
Crankpin Journal Outer Diameter, in (mm) ............... 1.4949-1.4957 (37.970-37.990)
Crankshaft Main Bearing Clearance, in (mm) ............... 0.0008-0.0027 (0.020-0.068)
Crankshaft Axial End Play, in (mm) ............... 0.0020-0.0118 (0.050-0.300)
Piston Skirt Outer Diameter, in (mm) ............... 2.9900-2.9911 (75.945-75.975)
Piston to Cylinder Bore Clearance, in (mm) ............... 0.0016-0.0033 (0.040-0.085)
Piston Pin Bore Inner Diameter, in (mm) ............... 0.7874-0.7877 (20.000-20.009)
Piston Pin Outer Diameter, in (mm) ............... 0.7871-0.7874 (19.991-20.000)
Piston Pin to Piston Pin Bore Clearance, in (mm) ............... 0.0000-0.0007 (0.000-0.018)
Piston Pin to Small End Bushing Clearance, in (mm) ............... 0.0003-0.0013 (0.008-0.034)
Top Ring Groove Width, in (mm) ............... 0.0602-0.0610 (1.530-1.550)
Second Ring Groove Width, in (mm) ............... 0.0602-0.0610 (1.530-1.550)
Oil Ring Groove Width, in (mm) ............... 0.1189-0.1197 (3.020-3.040)
Top Ring Side Clearance, in (mm) ............... 0.0020-0.0035 (0.050-0.090)
Second Ring Side Clearance, in (mm) ............... 0.0012-0.0028 (0.030-0.070)
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, in (mm) ............... 0.0020 (0.05)
Valve Guide Inner Diameter, in (mm) ............... 0.2598-0.2605 (6.600-6.615)
Intake Valve Stem Outer Diameter, in (mm) ............... 0.2579-0.2585 (6.550-6.565)
Exhaust Valve Stem Outer Diameter, in (mm) ............... 0.2567-0.2573 (6.520-6.535)
Intake Valve Stem to Guide Clearance, in (mm) ............... 0.0014-0.0026 (0.035-0.065)
Exhaust Valve Stem to Guide Clearance, in (mm) ............... 0.0026-0.0037 (0.065-0.095)
Valve Seat Angle (Intake and Exhaust), deg ............... 45
Valve Face Angle (Intake and Exhaust), deg ............... 45
Intake Valve Sinkage Depth, in (mm) ............... 0.0276-0.0354 (0.70-0.90)
Exhaust Valve Sinkage Depth, in (mm) ............... 0.0276-0.0354 (0.70-0.90)
Valve Spring Free Length, in (mm) ............... 1.3937 (35.40)
Rocker Shaft Outer Diameter, in (mm) ............... 0.4717-0.4724 (11.982-12.000)
Rocker Arm Bushing Inner Diameter, in (mm) ............... 0.4730-0.4741 (12.016-12.043)
Rocker Arm Bushing to Shaft Clearance, in (mm) ............... 0.0006-0.0024 (0.016-0.061)
Camshaft Journal Outer Diameter (Front), in (mm) ............... 1.4949-1.4957 (37.970-37.990)
Camshaft Journal Outer Diameter (Center), in (mm) ............... 1.4921-1.4929 (37.900-37.920)
Camshaft Journal Outer Diameter (Rear), in (mm) ............... 1.4949-1.4957 (37.970-37.990)
Cam Lobe Height (Intake), in (mm) ............... 1.3094-1.3114 (33.260-33.310)
Cam Lobe Height (Exhaust), in (mm) ............... 1.3094-1.3114 (33.260-33.310)
Camshaft Bearing Oil Clearance, in (mm) ............... 0.0012-0.0035 (0.030-0.090)
Camshaft Axial End Play, in (mm) ............... 0.0020-0.0098 (0.050-0.250)

Tightening Torques

Cylinder Head M8 Bolts, lb-ft (Nm) ............... 14.5-21.7 (19.6-29.4)
Cylinder Head M10 Bolts, lb-ft (Nm) ............... 54.3-61.5 (73.5-83.4)
Connecting Rod Cap Nuts, lb-ft (Nm) ............... 36.1-39.8 (49.0-54.0)
Flywheel Mounting Bolts, lb-ft (Nm) ............... 61.5-68.7 (83.4-93.2)
Main Bearing Cap Bolts, lb-ft (Nm) ............... 36.1-39.8 (49.0-54.0)
Crankshaft Pulley Nut, lb-ft (Nm) ............... 72.3-86.8 (98.0-117.7)
Camshaft Thrust Plate Bolts, lb-ft (Nm) ............... 7.2-10.8 (9.8-14.7)
Rocker Shaft Bracket Bolts, lb-ft (Nm) ............... 10.8-14.5 (14.7-19.6)
Cylinder Head Cover Screws, lb-ft (Nm) ............... 3.6-5.1 (4.9-6.9)
Oil Pan Drain Plug, lb-ft (Nm) ............... 25.3-32.5 (34.3-44.1)
Oil Filter Cartridge, lb-ft (Nm) ............... 8.7-13.0 (11.8-17.7)
Fuel Pump Delivery Valve Holders, lb-ft (Nm) ............... 25.3-28.9 (34.3-39.2)
Fuel Pump Mounting Nuts, lb-ft (Nm) ............... 10.8-14.5 (14.7-19.6)
Fuel Injection Nozzle Assembly to Head, lb-ft (Nm) ............... 36.1-43.4 (49.0-58.8)
Fuel Injection Nozzle Nut, lb-ft (Nm) ............... 25.3-36.1 (34.3-49.0)
Fuel Injection High Pressure Pipe Nuts, lb-ft (Nm) ............... 18.1-21.7 (24.5-29.4)
Fuel Overflow Pipe Nut, lb-ft (Nm) ............... 14.5-18.1 (19.6-24.5)
Glow Plugs, lb-ft (Nm) ............... 10.8-14.5 (14.7-19.6)
Oil Pressure Switch, lb-ft (Nm) ............... 10.8-14.5 (14.7-19.6)
Water Temperature Gauge Unit, lb-ft (Nm) ............... 14.5-21.7 (19.6-29.4)
Starter Motor Mounting Bolts, lb-ft (Nm) ............... 36.1-39.8 (49.0-54.0)
Alternator Mounting Bolts, lb-ft (Nm) ............... 14.5-21.7 (19.6-29.4)
Exhaust Manifold Bolts, lb-ft (Nm) ............... 10.8-14.5 (14.7-19.6)
Intake Manifold Bolts, lb-ft (Nm) ............... 10.8-14.5 (14.7-19.6)
Gear Case Cover Bolts, lb-ft (Nm) ............... 7.2-10.8 (9.8-14.7)

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• Mitsubishi Engines Specs
  
• Mitsubishi L2C Specs
  
• Mitsubishi L3A Specs
  
• Mitsubishi L3C Specs
  
• Mitsubishi L3E Specs
  

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