Mitsubishi S2E Troubleshooting
| Engine Model: Mitsubishi S2E |
| Engine Type: 4-cycle 2-cylinder naturally aspirated liquid-cooled diesel |
| Total Displacement: 79.6 cu.in (1.31 L) |
| Rated Engine Power: 24.7 Hp (18.4 kW) at 2400 rpm |
| Fuel System Type: Indirect fuel injection |
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| Engine hard to start or doesn't start |
Fuel filter plugged - Change filter element.
There is air in the fuel system - Bleed the system.
Fuel injection nozzles are damaged or dirty - Test injection nozzles and change if necessary.
Fuel injection pump is defective - Repair or install new pump.
Wrong valve timing - Correct or replace timing gear.
Plugged fuel pipes - Service or replace fuel pipes.
Incorrect injection timing - Adjust injection timing as required.
Damaged piston rings and cylinder - Replace faulty components.
| Engine starts but immediately stalls |
Dirty fuel filter - Clean or change the filter.
Fuel injection pump malfunction - Replace injection pump or repair it.
Clogged air cleaner - Air filter maintenance required.
Improper nozzle opening pressure - Adjust as recommended.
| Diesel shuts off while driving |
Fuel injection timing is not adjusted - Adjust the pump as required.
Fuel filter plugged - Service or replace the filter.
Low coolant temperature - Engine is not warmed up to the required temperature.
Stuck or clogged injection nozzle - Service or change injection nozzles.
Incorrectly set low idle speed - Adjustment required.
Valve out of adjustment - Need to adjust valve clearance.
Fuel injection pump failure - Replace or repair injection pump.
Dirty or faulty injection nozzles - Check and replace nozzles if required.
Restricted fuel lines or hoses - Service fuel hoses and lines.
Plugged air filter - Clean or change the filter.
Damaged cylinder-head gasket - Install a new gasket.
Injection timing is improper - Adjust according to specifications.
Fuel injection pump is damaged - Change pump or rebuild it.
One of moving engine parts has broken - Replace or repair damaged components.
Defective radiator cap or clogged radiator core - Clean radiator or change cap.
Low coolant level - Fill the cooling system and check components for leaks or other faults.
Loose or damaged fan belt - The fan belt needs to be replaced.
Engine oil level is insufficient - Fill up the oil to required level.
Cylinder head gasket is damaged - Replace cylinder head gasket.
Injection timing is wrong - Use correct injection timing adjustment.
| Oil pressure is insufficient |
Engine oil level low - Add oil as required.
Oil pump is damaged - Remove and inspect oil pump.
Oil filter clogged - Clean or replace engine oil filter element.
Worn or dirty relief valve - Change or clean relief valve.
Crankshaft bearing clearance is excessive - Test and replace or repair worn components.
Excessive crankpin bearing clearance - Inspect and replace or repair faulty components.
| Excessive engine oil consumption |
External oil leaks: Damaged gaskets or seals - Defective components must be replaced.
Incorrect oil viscosity - Fill up with the proper oil viscosity.
Stuck or worn piston rings - Change piston rings.
Worn valve guides and valve stems - Replace the valves.
Pistons or cylinder liners are worn - Inspect liners and pistons, fit new parts as necessary.
| Engine knocking sound or abnormal noise |
Low coolant temperature - Engine is not warmed up to the required temperature.
Engine oil insufficient - Fill up the engine oil.
Incorrect adjustment of fuel injection pump timing - Check the fuel injection pump timing adjustment.
Pistons are worn or scored - Replace the pistons.
Connecting rod is misaligned or defective - Align or replace connecting rod.
| Starter motor cranks slow |
Low battery output - Low battery charging, charge as required.
Battery won’t hold charge - Service charging system or install new battery.
Terminals are faulty or battery cables are disconnected - Check cable connections and replace or service terminals.
Battery is low or faulty - Charge or replace the battery.
Disconnected or improperly connected wiring harness - Inspect battery wiring harness and connect as required.
Low battery power - Recharge the battery.
Faulty starter motor - Repair or replace starter.
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