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Mitsubishi L2C Engine

General Technical Data

Engine Specifications

Engine Model ............... Mitsubishi L2C
Engine Type ............... 4-cycle inline 2-cylinder swirl chamber liquid-cooled diesel
Number of Cylinders ............... 2
Cylinder Arrangement ............... In-line
Engine Bore, in (mm) ............... 2.76 (70.0)
Engine Stroke, in (mm) ............... 2.76 (70.0)
Displacement, cu.in (L) ............... 32.8 (0.538)
Rated Engine Power, hp (kW) ............... 9.5-12.0 (7.1-8.9)
Rated Engine Speed, rpm ............... 1900-3000
Peak Torque ............... 22.1-25.8 lb-ft (30.0-35.0 Nm) at 2000 rpm
Idle Speed ............... 800-900 rpm
Aspiration Type ............... Naturally Aspirated
Operating Speed ............... 1900-3000 rpm
Compression Ratio ............... 22.0:1-23.0:1
Firing Order ............... 1-2
Combustion System ............... Swirl chamber indirect injection
Piston Type ............... Aluminum alloy autothermic
Connecting Rod Material ............... Forged carbon steel
Crankshaft Material ............... Forged carbon steel inductive hardened
Camshaft Drive ............... Gear train driven
Valve Mechanism ............... Overhead valve pushrod operated
Valves Per Cylinder ............... 2 (1 intake, 1 exhaust)
Cylinder Block Type ............... Cast iron
Cylinder Head Type ............... Cast iron
Lubrication System ............... Full-pressure forced circulation
Oil Pump Type ............... Trochoid gear-driven
Oil Filter Type ............... Full-flow spin-on cartridge
Cooling System ............... Liquid-cooled forced circulation
Water Pump Type ............... Belt-driven centrifugal pump
Air Cleaner Type ............... Dry polyurethane or paper element
Starting System ............... Electric starter motor
Electrical System ............... 12V
Alternator Capacity ............... 15A or 25A

Fuel System

Fuel Injection Pump Type ............... Bosch M mini in-line cassette pump
Fuel Injection Pump Drive ............... Camshaft gear direct mechanical drive
Fuel Injector Nozzle Type ............... Throttle pintle nozzle
Fuel Injection Pressure, psi (bar) ............... 1991-2133 (137.3-147.1)
Fuel Injection Timing, deg BTDC ............... 17.0-19.0
Fuel Feed Pump Type ............... Mechanical diaphragm type or electric fuel pump
Fuel Filter Type ............... Spin-on element with transparent water sedimenter
Fuel Transfer Pump Pressure, psi (bar) ............... 2.9-4.3 (0.2-0.3)
Fuel Return Line Type ............... Low-pressure rubber overflow hose
Fuel Injection Nozzle Holder ............... Screw-in type thread M20
Fuel Injection Pump Element Diameter, in (mm) ............... 0.20-0.24 (5.0-6.0)
Fuel Injection Pump Stroke, in (mm) ............... 0.24-0.28 (6.0-7.0)
Governor Type ............... Centrifugal ball mechanical weight type
Governor Sleeve Lift, in (mm) ............... 0.28-0.31 (7.0-8.0)
Fuel Leak-off Configuration ............... Common shared return pipe line
Recommended Fuel Grade ............... ASTM D975 No. 2-D diesel fuel oil
Fuel Cetane Number Minimum ............... 45
Max Fuel System Restriction, in Hg (mm Hg) ............... 2.9-3.9 (75.0-100.0)
Fuel Tank Vent Air Flow Rate, cfm (L/min) ............... 0.53-0.71 (15.0-20.0)
Glow Plug Type ............... Sheathed rapid heat metallic type
Glow Plug Rated Voltage ............... 10.5V or 12V
Glow Plug Current Draw, A ............... 8.0-10.0 per plug
Fuel Injection Piping Inner Diameter, in (mm) ............... 0.06-0.08 (1.5-2.0)
Fuel Injection Piping Outer Diameter, in (mm) ............... 0.24 (6.0)
Fuel Shut-off Mechanism ............... ETS electric solenoid or mechanical stop lever

Dimensions and Weight

Overall Length, in (mm) ............... 16.4-23.9 (415-605)
Overall Width, in (mm) ............... 16.5-16.9 (420-430)
Overall Height, in (mm) ............... 19.7 (500.0)
Dry Weight, lbs (kg) ............... 143-155 (65-70)
Wet Weight, lbs (kg) ............... 159-170 (72-77)

Maintenance Data

Service Information

Minimum Compression Pressure, psi (bar) ............... 370-398 (25.5-27.4)
Standard Compression Pressure, psi (bar) ............... 427-455 (29.4-31.4)
Compression Difference Between Cylinders, psi (bar) ............... 28.4-35.6 (2.0-2.5)
Oil Pressure at Low Idle Speed, psi (bar) ............... 7.1-14.2 (0.49-0.98)
Oil Pressure at Rated Speed, psi (bar) ............... 28.4-56.9 (2.0-4.0)
Thermostat Opening Temperature, F (C) ............... 160-170 (71.0-76.5)
Thermostat Full Open Temperature, F (C) ............... 194 (90.0)
Max Permissible Oil Temperature, F (C) ............... 230 (110.0)
Fan Belt Deflection at 22 lb (98 N) Force, in (mm) ............... 0.28-0.47 (7.0-12.0)

Engine Oil and Coolant

Engine Oil Type .................. SAE 10W-30, SAE 15W-40
API Service Classifications ......................... CD, CE, CF-4, or CG-4
Engine Oil Capacity (High Level), qt (L) ............... 2.5-3.2 (2.4-3.0)
Engine Oil Capacity (Low Level), qt (L) ............... 1.5-1.9 (1.4-1.8)
Coolant Capacity Engine Only, qt (L) ............... 1.2-1.6 (1.1-1.5)

Service Intervals

Change engine oil ............... Every 200 hours
Replace oil filter ............... Every 200 hours
Replace fuel filter ............... Every 400 hours
Service air filter ............... Every 100 hours
Replace air filter ............... Every 400 hours
Change coolant ............... Every 1000 hours
Valve-lash adjustment ............... Every 400 hours
Check fuel system ............... Every 400 hours
Compression test ............... Every 800 hours
Clean radiator fin ............... Every 100 hours
Belt inspection ............... Every 100 hours

Service Specifications

Cylinder Block Bore Inside Diameter, in (mm) ............... 2.7559-2.7571 (70.000-70.030)
Cylinder Block Bore I.D Wear Limit, in (mm) ............... 2.7638 (70.200)
Cylinder Block Bore Taper and Roundness, in (mm) ............... 0.0004 (0.010)
Cylinder Block Top Surface Flatness, in (mm) ............... 0.0020 (0.050)
Crankshaft Main Journal Diameter, in (mm) ............... 1.6929-1.6937 (43.000-43.020)
Crankpin Journal Diameter, in (mm) ............... 1.5748-1.5756 (40.000-40.020)
Crankshaft Main Bearing Clearance, in (mm) ............... 0.0012-0.0028 (0.030-0.070)
Connecting Rod Bearing Clearance, in (mm) ............... 0.0012-0.0026 (0.030-0.065)
Crankshaft End Play, in (mm) ............... 0.0020-0.0069 (0.050-0.175)
Crankshaft Thrust Washer Thickness, in (mm) ............... 0.0787-0.0807 (2.000-2.050)
Connecting Rod Side Clearance, in (mm) ............... 0.0039-0.0098 (0.100-0.250)
Piston Skirt Outer Diameter, in (mm) ............... 2.7535-2.7547 (69.940-69.970)
Piston to Cylinder Bore Clearance, in (mm) ............... 0.0016-0.0028 (0.040-0.070)
Piston Pin Bore Inside Diameter, in (mm) ............... 0.7874-0.7878 (20.000-20.010)
Piston Pin Outer Diameter, in (mm) ............... 0.7870-0.7874 (19.990-20.000)
Piston Pin to Piston Pin Bore Clearance, in (mm) ............... 0.0000-0.0004 (0.000-0.010)
Piston Pin to Small End Bushing Clearance, in (mm) ............... 0.0006-0.0018 (0.015-0.045)
Top Ring Groove Width, in (mm) ............... 0.0610-0.0622 (1.550-1.580)
Second Ring Groove Width, in (mm) ............... 0.0602-0.0614 (1.530-1.560)
Oil Ring Groove Width, in (mm) ............... 0.1587-0.1598 (4.030-4.060)
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) ............... 0.0012-0.0028 (0.030-0.070)
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 Flatness, in (mm) ............... 0.0020 (0.050) or less
Intake Valve Stem Outer Diameter, in (mm) ............... 0.2583-0.2589 (6.560-6.575)
Exhaust Valve Stem Standard Outer Diameter, in (mm) ............... 0.2571-0.2579 (6.530-6.550)
Valve Guide Inside Diameter Standard, in (mm) ............... 0.2598-0.2604 (6.600-6.615)
Intake Valve Stem to Guide Clearance, in (mm) ............... 0.0010-0.0022 (0.025-0.055)
Exhaust Valve Stem to Guide Clearanc, in (mm) ............... 0.0020-0.0033 (0.050-0.085)
Valve Face Angle, deg ............... 45
Valve Seat Angle, deg ............... 45
Valve Sinkage Depth, in (mm) ............... 0.0276-0.0354 (0.700-0.900)
Valve Seat Contact Width, in (mm) ............... 0.0472-0.0591 (1.200-1.500)
Valve Spring Free Length, in (mm) ............... 1.3976 (35.500)
Camshaft Journal Outer Diameter, in (mm) ............... 1.4173-1.4181 (36.000-36.020)
Camshaft Journal Clearance, in (mm) ............... 0.0012-0.0028 (0.030-0.070)
Cam Lobe Height (Intake), in (mm) ............... 1.0551-1.0571 (26.800-26.850)
Cam Lobe Height (Exhaust), in (mm) ............... 1.0551-1.0571 (26.800-26.850)
Rocker Arm Shaft Outer Diameter, in (mm) ............... 0.4685-0.4693 (11.900-11.920)
Rocker Arm Bushing Inside Diameter, in (mm) ............... 0.4705-0.4717 (11.950-11.980)
Rocker Arm Bushing to Shaft Clearance, in (mm) ............... 0.0012-0.0031 (0.030-0.080)
Tappet Guide Hole Diameter Block, in (mm) ............... 0.7087-0.7094 (18.000-18.018)
Tappet Stem Outer Diameter, in (mm) ............... 0.7062-0.7074 (17.938-17.968)
Tappet to Block Guide Hole Clearance, in (mm) ............... 0.0013-0.0031 (0.032-0.080)

Tightening Torques

Cylinder Head Bolts (Initial Step) ............... 25.3-28.9 lb-ft (34.3-39.2 Nm)
Cylinder Head Bolts (Final Step) ............... 50.6-57.9 lb-ft (68.6-78.5 Nm)
Connecting Rod Cap Nuts ............... 23.1-26.0 lb-ft (31.4-35.3 Nm)
Main Bearing Cap Bolts ............... 36.2-39.8 lb-ft (49.0-53.9 Nm)
Flywheel Bolts ............... 43.4-47.0 lb-ft (58.8-63.7 Nm)
Crankshaft Pulley Center Lock Bolt ............... 72.3-79.6 lb-ft (98.0-107.9 Nm)
Camshaft Thrust Plate Bolts ............... 7.2-8.7 lb-ft (9.8-11.8 Nm)
Camshaft Timing Gear Bolts ............... 43.4-50.6 lb-ft (58.8-68.6 Nm)
Rocker Arm Shaft Bracket Holding Bolt ............... 10.8-14.5 lb-ft (14.7-19.6 Nm)
Rocker Arm Jam Adjusting Nut ............... 8.7-11.6 lb-ft (11.8-15.7 Nm)
Valve Cover Retaining Acorn Nut ............... 3.6-5.1 lb-ft (4.9-6.9 Nm)
Timing Gear Case Outer Housing Bolts ............... 10.8-14.5 lb-ft (14.7-19.6 Nm)
Oil Pan Perimeter Base Screws ............... 7.2-8.7 lb-ft (9.8-11.8 Nm)
Oil Pan Bottom Drain Plug Screw ............... 25.3-32.5 lb-ft (34.3-44.1 Nm)
Oil Pressure Switch Sensor Body Thread ............... 10.8-13.0 lb-ft (14.7-17.7 Nm)
Water Pump Assembly Holding Bolts ............... 10.8-14.5 lb-ft (14.7-19.6 Nm)
Coolant Thermostat Housing Mount Bolts ............... 10.8-14.5 lb-ft (14.7-19.6 Nm)
Coolant Temperature Sender Body Unit ............... 14.5-18.1 lb-ft (19.6-24.5 Nm)
Fuel Injection Pump Housing Nuts ............... 10.8-14.5 lb-ft (14.7-19.6 Nm)
Fuel Injection Pump Gear Lock Nut ............... 25.3-32.5 lb-ft (34.3-44.1 Nm)
Fuel Injection Nozzle Thread Into Head ............... 36.2-43.4 lb-ft (49.0-58.8 Nm)
Fuel Injection Nozzle Retaining Cap Nut ............... 25.3-28.9 lb-ft (34.3-39.2 Nm)
Fuel High Pressure Line Union Nuts ............... 18.1-21.7 lb-ft (24.5-29.4 Nm)
Fuel Return Line Common Banjo Bolt ............... 14.5-18.1 lb-ft (19.6-24.5 Nm)
Glow Plug Terminal Small Hex Nuts ............... 0.7-1.1 lb-ft (1.0-1.5 Nm)
Glow Plug Body Thread Into Cylinder Head ............... 10.8-14.5 lb-ft (14.7-19.6 Nm)
Intake Manifold Flange Holding Bolts ............... 10.8-14.5 lb-ft (14.7-19.6 Nm)
Exhaust Manifold Flange Holding Stud Nuts ............... 14.5-18.1 lb-ft (19.6-24.5 Nm)
Starter Motor Flange Mounting Stud Nuts ............... 28.9-36.2 lb-ft (39.2-49.0 Nm)
Alternator Pivot Mount Long Holding Bolt ............... 14.5-21.7 lb-ft (19.6-29.4 Nm)
Alternator Tension Adjustment Lock Bolt ............... 10.8-14.5 lb-ft (14.7-19.6 Nm)
Exhaust Pipe Companion Flange Nuts ............... 25.3-32.5 lb-ft (34.3-44.1 Nm)
Oil Pump Cover Plate Retaining Screws ............... 5.1-7.2 lb-ft (6.9-9.8 Nm)
Oil Strainer Pick-up Tube Bracket Bolt ............... 7.2-8.7 lb-ft (9.8-11.8 Nm)
Governor Housing Frame Assembly Screws ............... 7.2-8.7 lb-ft (9.8-11.8 Nm)
Governor Weight Assembly Retaining Nut ............... 21.7-28.9 lb-ft (29.4-39.2 Nm)
Torque Spring Set Lock Nut Assembly ............... 5.8-8.7 lb-ft (7.8-11.8 Nm)
Tie-rod Cover Side Face Small Bolts ............... 3.6-5.1 lb-ft (4.9-6.9 Nm)
Flywheel Housing Rear Frame Large Bolts ............... 36.2-43.4 lb-ft (49.0-58.8 Nm)
Fan Drive Pulley Segment Small Bolts ............... 7.2-8.7 lb-ft (9.8-11.8 Nm)

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

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