Mitsubishi K3E Troubleshooting
| Engine Model: Mitsubishi K3E |
| Engine Type: 4-cycle inline 3-cylinder naturally aspirated liquid-cooled diesel |
| Total Displacement: 64.7 cu.in (1.06 L) |
| Rated Engine Power: 18.5 to 25 Hp (13.6 to 18.6 kW) at 2500 rpm |
| Fuel System Type: Indirect fuel injection |
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| Diesel engine hard to start or doesn't start |
Fuel filter plugged - Change filter element.
Air in fuel system - Bleed fuel system.
Fuel injection nozzles are damaged - Clean or replace injection nozzles.
Fuel injection pump is not working correctly - Replacement or repair required.
Improper valve timing - Adjust or change timing gear.
Fuel pipes are dirty - Service or replace fuel pipes.
Injection timing is out of adjustment - Use correct injection timing adjustment.
Piston rings and cylinder are worn - Change defective components.
| Engine starts but then stalls |
Fuel filter element is dirty - Replace the filter element.
Faulty fuel injection pump - Install a new pump or rebuild.
Air filter is clogged - Install new air filter element.
Improper nozzle opening pressure - Adjust as required.
| Engine stalls after running |
Improper fuel injection timing - Adjust as recommended.
Fuel filter element is clogged - Filter maintenance required.
Engine not warmed up - Warm up the engine.
Stuck or clogged injection nozzle - Repair or change injection nozzles.
| Engine stops at low idle speed |
Wrong adjustment of low idle speed - Test and adjust.
Incorrect valve clearance - Adjust valve clearance according to specifications.
Fuel injection pump is not operating properly - Change or repair the pump.
Fuel injection nozzles fault - Inspect nozzles and replace if necessary.
Fuel hoses or lines clogging - Service fuel lines and hoses.
Air filter is clogged - Clean or change.
Worn cylinder head gasket - Install a new gasket.
Incorrect injection timing - Set up as recommended.
Fuel injection pump is faulty - Change pump or rebuild it.
One of moving engine components has failed - Repair or replace defective components.
Dirty radiator core or faulty radiator cap - Replace cap or clean radiator.
Engine coolant is insufficient - Add coolant fluid to cooling system and also check it for leaks.
Damaged or worn fan belt - The fan belt needs to be replaced.
Engine oil level low - Fill up the engine oil.
Cylinder head gasket defective - Install new cylinder head gasket.
Injection timing is wrong - Adjust injection timing as required.
| Oil pressure is insufficient |
Oil level is insufficient - Need to add oil.
Worn oil pump - Remove and inspect oil pump.
Oil filter element clogged - Clean or change engine oil filter.
Relief valve is seized or worn - Relief valve need to be replaced or cleaned.
Crankshaft bearing clearance is excessive - Test and repair or replace worn parts.
Excessive crankpin bearing clearance - Check and change or repair defective parts.
Oil leakage: Gaskets or seals are excessively worn - Install new components.
Improper oil viscosity - Use oil of correct viscosity.
Piston rings are stuck or broken - Install new piston rings.
Worn valve stems and valve guides - Need to replace the valves.
Cylinder liners or pistons are worn - Inspect liners and pistons, change as necessary.
| Engine knocking sound or abnormal noise |
Engine is not fully warmed up - Warm up to required temperature.
Engine oil level is low - Add oil to the engine crankcase.
Fuel injection pump timing is not adjusted - Set it up as required.
Scored or worn pistons - Pistons replacement required.
Connecting rod is not aligned or defective - Alignment procedure or replacement is required.
Low battery capacity - Battery is drained, recharge it.
Battery does not hold charge - Service charging system or replace battery.
Bad terminals or disconnected battery cables - Check battery wires and service or replace terminals.
Battery is drained or defective - Recharge or replace battery.
Battery cables are disconnected or incorrectly connected - Check cables and connect as needed.
Low battery voltage - Battery is drained, recharge it.
Starter motor is damaged - Starter should be replaced.
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