Mitsubishi S6E Troubleshooting
| Engine Model: Mitsubishi S6E |
| Engine Type: 4-cycle inline 6-cylinder naturally aspirated liquid-cooled diesel |
| Total Displacement: 238.8 cu.in (3.91 L) |
| Rated Engine Power: 107 Hp (80 kW) at 2500 rpm |
| Fuel System Type: Indirect fuel injection |
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| Engine starts up hard or won't start |
Fuel filter element is clogged - Replace filter element.
Air in the fuel pipes - Bleed the fuel pipes.
Dirty or faulty injection nozzles - Inspect nozzles and replace if necessary.
Fuel injection pump damage - Change pump or rebuild it.
Valve timing is wrong - Correct or change timing gear.
Plugged fuel pipes - Clean or change fuel pipes.
Injection timing is wrong - Set up as recommended.
Worn cylinder or piston rings - Change faulty components.
| Engine starts but stalls immediately |
Fuel filter element is dirty - Install new filter element.
Fuel injection pump damage - Rebuild or change fuel pump.
Plugged air filter - Clean or change.
Nozzle opening pressure is not adjusted - Adjust as recommended.
| Engine shuts off suddenly during operation |
Improper fuel injection timing - Adjust according to specifications.
Fuel filter plugging - Clean or replace the filter.
Engine is not fully warmed up - Warm up to required temperature.
Stuck or clogged injection nozzle - Clean or change injection nozzles.
Improperly adjusted low idle speed - Test and adjust.
Improper valve clearance - Adjust valve clearance.
Fuel injection pump malfunction - Repair or change injection pump.
| Diesel engine is losing power |
Defective injection nozzle - Replace injection nozzles.
Dirty fuel hoses or lines - Service fuel hoses and lines.
Air filter is clogged - Clean or change the filter.
Cylinder head gasket defective - Replace the gasket as required.
Incorrect injection timing - Adjust as recommended.
Fuel injection pump is defective - Rebuild or replace pump.
One of moving engine components is worn - Repair or replace defective parts.
Clogged radiator core or leaking radiator cap - Replace cap or clean radiator.
Insufficient coolant fluid - Fill the cooling system and check components for leaks or other faults.
Loose or defective fan belt - Fan belt must be replaced.
Engine oil level is insufficient - Check and refill engine oil.
Worn cylinder head gasket - Install a new gasket.
Injection timing is incorrect - Adjust according to specifications.
| Oil pressure is insufficient |
Oil level is insufficient - Check oil level and add oil as required.
Oil pump is damaged - Replace as required.
Oil filter clogging - Replace or clean engine oil filter element.
Stuck or defective relief valve - Change or service relief valve.
Excessive oil clearance of crankshaft bearing - Test and repair or replace worn parts.
Clearance of crankpin bearing is excessive - Test and replace or repair worn components.
| Engine using too much oil |
Oil leaks: Damaged seals or gaskets - To repair leaks, replace worn parts.
Oil viscosity is incorrect - Fill up with the proper oil viscosity.
Stuck or worn piston rings - Piston rings need to be replaced.
Valve guides or stems are damaged - Change the valves.
Scored cylinder liners or pistons - Check liners and pistons, change as required.
Engine not warmed up - Warm up engine as required.
Lack of engine oil - Check oil level and add oil as required.
Improper fuel injection timing - Set the fuel pump timing correctly.
Worn or broken pistons - Pistons replacement required.
Connecting rod misalignment or failure - Need to change or align the connecting rod.
| Starter motor cranks slow |
Low battery voltage - Battery is drained, charge it.
Battery does not hold charge - Service charging system or replace battery.
Battery cables are disconnected or terminals are faulty - Connect wires correctly or change terminals.
Battery is discharged or worn - Charge or change the battery.
Wiring is improperly connected or disconnected - Check wiring and connect properly.
Battery power is low - Battery is drained, charge it.
Defective starter motor - Replace or repair starter.
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