Mitsubishi S3E2 Troubleshooting
| Engine Model: Mitsubishi S3E2 |
| Engine Type: 4-cycle inline 3-cylinder naturally aspirated liquid-cooled diesel |
| Total Displacement: 135.3 cu.in (2.22 L) |
| Rated Engine Power: 42 Hp (31.3 kW) at 2400 rpm |
| Fuel System Type: Indirect fuel injection |
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| Engine hard to start or won't start |
Fuel filter element is clogged - Service the filter.
Air trapped in fuel system - Bleed air.
Dirty or faulty injection nozzles - Inspect nozzles and replace if necessary.
Fuel injection pump is damaged - Replace or repair injection pump.
Wrong valve timing - Correct or change timing gear.
Restricted fuel pipes - Service or change fuel pipes.
Unadjusted injection timing - Adjust as recommended.
Cylinder or piston rings are worn - Change defective parts.
| Diesel starts and stalls immediately |
Dirty fuel filter - Change filter element.
Fuel injection pump malfunctioning - Rebuild or change fuel pump.
Clogged air cleaner - Change air filter element.
Nozzle opening pressure is improper - Adjust as recommended.
| Diesel shuts off while driving |
Improper setting of fuel injection pump timing - Adjust the pump as required.
Fuel filter element is clogged - Service or replace the filter.
Engine is cold - Warm up the engine.
Stuck or clogged injection nozzle - Check injection nozzles and replace if required.
Wrong adjustment of low idle speed - Adjustment required.
Valve clearance is wrong - Check and adjust.
Fuel injection pump malfunction - Change or repair the pump.
Clogged or burnt injection nozzle - Clean or replace injection nozzles.
Fuel hoses or lines are clogged - Service fuel hoses and lines.
Air filter element clogged - Carry out maintenance on air filter.
Defective cylinder head gasket - Cylinder-head gasket replacement required.
Unadjusted injection timing - Check injection timing adjustment.
Fuel injection pump is faulty - Rebuild or change fuel pump.
One of moving engine parts is faulty - Replace or repair damaged components.
Dirty radiator core or defective radiator cap - Replace cap or clean radiator.
Coolant level is low - Add coolant and check the components of cooling system.
Excessive wear of the fan belt - Change the fan belt.
Insufficient engine oil - Fill up the oil to required level.
Damaged cylinder-head gasket - Cylinder-head gasket replacement required.
Wrong injection timing - Adjust according to specifications.
| Insufficient oil pressure |
Oil level is low - Need to add oil.
Oil pump failure - Inspect and change as required.
Oil filter element clogging - Service or replace engine oil filter.
Stuck or worn relief valve - Replace or clean relief valve.
Excessive crankshaft bearing clearance - Check and replace or repair defective parts.
Crankpin bearing clearance is excessive - Check and replace or repair defective parts.
External oil leaks: Defective seals or gaskets - Worn parts need to be replaced.
Oil viscosity is incorrect - Fill up with the correct oil viscosity.
Piston rings are seized or worn - Piston rings need to be replaced.
Damaged valve stems or valve guides - Valves need to be changed.
Worn cylinder liners or pistons - Check liners and pistons, replace as required.
Engine is cold - Warm up to required temperature.
Low engine oil level - Fill up the oil to required level.
Improper fuel injection timing - Adjust as recommended.
Piston wear or scoring - Replace the pistons as required.
Faulty or misaligned connecting rod - Replace or align connecting rod.
Low battery power - Battery is drained, recharge it.
Battery does not hold charge - Service charging system or change battery.
Disconnected cables or faulty battery terminals - Check battery wires and service or replace terminals.
Battery is drained or defective - Replace or charge as required.
Wiring is improperly connected or disconnected - Check wiring and connect properly.
Low battery output voltage - Charge the battery.
Starter motor failing - Starter should be changed.
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