Mitsubishi S3L2 Troubleshooting
| Engine Model: Mitsubishi S3L2 |
| Engine Type: 4-cycle inline 3-cylinder naturally aspirated liquid-cooled diesel |
| Total Displacement: 80.4 cu.in (1.32 L) |
| Rated Engine Power: 28.4 Hp (21.2 kW) at 3000 rpm |
| Fuel System Type: Direct or indirect fuel injection |
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| Engine starts up hard or will not start |
Fuel filter element is dirty - Change filter element.
Air in the fuel lines - Bleed the fuel lines.
Damaged or dirty injection nozzles - Change fuel injection nozzles.
Defective fuel injection pump - Change or repair the pump.
Valve timing is wrong - Set the valve timing correctly.
Fuel pipes are clogged - Clean fuel pipes.
Injection timing is out of adjustment - Use correct injection timing adjustment.
Cylinder or piston rings are worn - Change faulty parts.
| Engine starts but stops suddenly |
Fuel filter element is dirty - Clean the filter element.
Fuel injection pump malfunctioning - Change or repair the pump.
Air filter plugged - Service or replace the air filter.
Improper nozzle opening pressure - Set it correctly.
| Engine stops running suddenly |
Wrong setting of fuel injection pump timing - Check the fuel injection pump timing adjustment.
Dirty fuel filter - Change filter element.
Engine is not warmed up to the required temperature - Normalize the temperature by warming up the engine.
Defective or stuck injection nozzles - Check injection nozzles and replace if required.
Low idle speed setting is not correct - Correct low idle adjustment.
Incorrect valve clearance - Adjust valve clearance according to specifications.
Fuel injection pump is faulty - Change pump or rebuild it.
Defective injection nozzle - Clean or replace injection nozzles.
Restricted fuel lines or hoses - Clean fuel lines and hoses.
Air cleaner is dirty - Air filter maintenance required.
Cylinder head gasket defective - Gasket should be replaced.
Incorrect injection timing - Adjust according to specifications.
Fuel injection pump malfunctioning - Repair or change injection pump.
Any of moving engine parts is worn - Change or repair damaged parts.
Dirty radiator core or faulty radiator cap - Change cap or clean radiator.
Low engine coolant - Fill radiator to proper level and check components for faults.
Fan belt slipping or worn - The fan belt needs to be replaced.
Insufficient engine oil - Add oil to the engine crankcase.
Damaged cylinder-head gasket - Replace the gasket as required.
Injection timing is out of adjustment - Adjust according to specifications.
| Oil pressure is insufficient |
Lack of oil - Add oil to the engine crankcase.
Worn oil pump - Repair or replace.
Oil filter is dirty - Replace or service engine oil filter.
Stuck or defective relief valve - Replace or service relief valve.
Excessive oil clearance of crankshaft bearing - Test and repair or replace worn parts.
Excessive oil clearance of crankpin bearing - Inspect and change or repair worn components.
| Excessive engine oil consumption |
Oil leaking: Gaskets or seals can be faulty - Defective components must be replaced.
Crankcase oil too light - Fill up with the correct oil viscosity.
Stuck or worn piston rings - Change the piston rings as required.
Valve guides or stems are damaged - Install new valves.
Worn cylinder liners or pistons - Inspect liners and pistons, change as necessary.
Coolant temperature is low - Warm up to required temperature.
Low engine oil level - Fill up the oil to required level.
Timing of fuel injection pump is incorrect - Check the fuel injection pump timing adjustment.
Worn or broken pistons - Replace the pistons as required.
Connecting rod is defective or misaligned - Connecting rod needs to be replaced or aligned.
Low battery output - Battery is drained, charge it.
Battery is draining quickly - Service charging system or replace battery.
Bad terminals or disconnected battery cables - Check cable connections and change or clean terminals.
| Starter motor is not working |
Battery is discharged or defective - Replace or charge as required.
Battery cables are disconnected or improperly connected - Inspect cables and connect properly.
Low battery output voltage - Charge the battery.
Starter motor failing - Starter needs to be replaced.
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