Mitsubishi L3E Troubleshooting
| Engine Model: Mitsubishi L3E |
| Engine Type: 4-cycle inline 3-cylinder naturally aspirated liquid-cooled diesel |
| Total Displacement: 58.1 cu.in (0.95 L) |
| Rated Engine Power: 23.7 Hp (17.7 kW) at 3600 rpm |
| Fuel System Type: Direct or indirect fuel injection |
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| Engine difficult to start or won't start |
Clogged fuel filter - Replace filter element.
There is air in the fuel system - Bleed the system.
Clogged or defective injection nozzles - Change fuel injection nozzles.
Defective fuel injection pump - Change or repair the pump.
Incorrect valve timing - Set the valve timing correctly.
Fuel pipes are plugged - Service fuel pipes.
Injection timing is wrong - Use correct injection timing adjustment.
Excessive wear of piston rings and cylinder - Replace faulty parts.
| Engine starts but stops suddenly |
Fuel filter element is clogged - Change filter element.
Fuel injection pump is broken - Install a new fuel pump or repair.
Clogged air cleaner - Air filter maintenance required.
Nozzle opening pressure is not adjusted - Set it correctly.
| Engine stalls during operation |
Incorrect adjustment of fuel injection pump timing - Set the fuel pump timing correctly.
Fuel filter plugged - Change the filter element.
Engine is cold - Warm up engine as required.
Injection nozzles are burnt or jammed - Clean or replace injection nozzles.
Low idle speed adjustment is incorrect - Test and adjust.
Valve clearance is wrong - Have it adjusted.
Fuel injection pump is not operating properly - Rebuild or change fuel pump.
Defective injection nozzle - Check injection nozzles and replace if required.
Fuel hoses or lines clogging - Clean fuel system hoses and lines.
Clogged air filter - Clean or change.
Cylinder head gasket defective - Change cylinder head gasket.
Wrong injection timing - Adjust according to specifications.
Fuel injection pump malfunctioning - Change pump or rebuild it.
Any of moving engine components is faulty - Change or repair damaged parts.
Dirty radiator fins or defective radiator cap - Replace cap or clean radiator.
Insufficient coolant - Add coolant and check the components of cooling system.
Fan belt slipping or worn - The fan belt needs to be replaced.
Engine oil level low - Checking oil level and add if necessary.
Cylinder head gasket is worn - Replace cylinder head gasket.
Wrong injection timing - Use correct injection timing adjustment.
| Insufficient oil pressure |
Lack of oil - Need to add oil.
Oil pump failure - Remove and inspect oil pump.
Oil filter is dirty - Clean or change engine oil filter.
Relief valve is defective or dirty - Replace or service relief valve.
Crankshaft bearing clearance is excessive - Check and replace or repair defective parts.
Excessive oil clearance of crankpin bearing - Test and repair or replace worn parts.
| Engine consuming too much oil |
Oil leakage: Worn gaskets or seals - Defective components must be replaced.
Oil viscosity is wrong - Use correct viscosity oil.
Piston rings are defective or worn - Piston rings need to be replaced.
Valve guides or stems are damaged - Change the valves.
Cylinder liners or pistons are scuffed - Inspect pistons and liners, change as required.
Engine not warmed up - Warm up the engine.
Low engine oil level - Checking oil level and add if necessary.
Fuel injection pump timing is wrong - Check the fuel injection pump timing adjustment.
Piston wear or scoring - Install new pistons.
Misaligned or defective connecting rod - Need to align or replace the connecting rod.
Battery capacity is low - Battery is drained, recharge it.
Battery is not holding charge - Service battery or change it.
Wires are disconnected or battery terminals are corroded - Connect wiring properly or install new terminals.
| Starter motor is not working |
Battery is drained or defective - Recharge or replace battery.
Wiring is incorrectly connected or disconnected - Inspect wiring and connect correctly.
Low battery voltage - Charge the battery.
Starter motor is faulty - Starter should be replaced.
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