Mitsubishi KE70 Troubleshooting
| Engine Model: Mitsubishi KE70 |
| Engine Type: 4-cycle 2-cylinder naturally aspirated liquid-cooled diesel |
| Total Displacement: 40.8 cu.in (0.67 L) |
| Rated Engine Power: 15 Hp (11.2 kW) at 2800 rpm |
| Fuel System Type: Indirect injection |
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| Engine starts hard or won't start |
Fuel filter plugged - Filter maintenance required.
Air in the fuel system - Air bleeding.
Clogged or defective injection nozzles - Test injection nozzles and change if necessary.
Fuel injection pump malfunction - Install a new pump or rebuild.
Unadjusted valve timing - Use correct valve timing adjustment.
Fuel pipes are plugged - Clean or replace fuel pipes.
Injection timing is wrong - Use correct injection timing adjustment.
Excessive wear of piston rings and cylinder - Replace faulty parts.
Clogged fuel filter - Filter maintenance required.
Defective fuel injection pump - Change or repair the pump.
Clogged air filter - Clean or replace the element.
Unadjusted nozzle opening pressure - Set up as recommended.
| Engine stops unexpectedly during operation |
Fuel injection timing is wrong - Adjust as recommended.
Fuel filter plugged - Clean or replace the filter.
Engine has not warmed up to the recommended temperature - Normalize the temperature by warming up the engine.
Defective or stuck injection nozzles - Check injection nozzles and replace if required.
Low idle speed adjustment is incorrect - Adjustment required.
Valve clearance is not correct - Adjust valve clearance.
Fuel injection pump is not operating properly - Replace injection pump or repair it.
Clogged injection nozzle - Install a new kit of correctly balanced nozzles.
Dirty fuel hoses or lines - Fuel lines and hoses need to be cleaned.
Dirty air filter element - Replace air filter element.
Leaking cylinder head gasket - Cylinder-head gasket replacement required.
Injection timing is out of adjustment - Adjust injection timing as required.
Fuel injection pump is faulty - Rebuild or change fuel pump.
One of moving engine parts is faulty - Repair or replace defective components.
Defective radiator cap or clogged radiator core - Change cap or clean radiator.
Low engine coolant - Top up coolant fluid and check system for leaks.
Loose or damaged fan belt - Change as required.
Engine oil level is low - Fill up the oil to required level.
Cylinder head gasket is blown - Change cylinder head gasket.
Unadjusted injection timing - Set the injection timing correctly.
| Insufficient oil pressure |
Low oil level - Fill up the engine oil.
Oil pump is worn or damaged - Install a new pump.
Clogged oil filter - Service or replace engine oil filter.
Worn or dirty relief valve - Change or clean relief valve.
Excessive crankshaft bearing clearance - Inspect and replace or repair faulty parts.
Clearance of crankpin bearing is excessive - Check and replace or repair defective parts.
| Engine consuming too much oil |
Oil leaks: Damaged gaskets or seals - Replace to repair leaks.
Wrong oil viscosity - Use correct viscosity oil.
Seized or wear piston rings - Piston rings replacement required.
Valve guides and stems are worn - Valves replacement required.
Cylinder liners or pistons are scored - Inspect pistons and liners, change as required.
Engine is cold - Warm up engine as required.
Engine oil level is low - Check oil level and add oil as required.
Fuel injection pump timing is not adjusted - Adjust fuel injection pump as required.
Pistons are broken or worn - Pistons replacement required.
Connecting rod misalignment or failure - Connecting rod needs to be replaced or aligned.
Low battery output - Battery needs to be recharged.
Battery will not hold charge - Battery needs to be serviced or replaced.
Faulty battery terminals or disconnected cables - Check wiring and clean or replace terminals.
| Starter motor is not working |
Battery is low or faulty - Change or recharge battery.
Battery cables are disconnected or incorrectly connected - Check cables and connect as needed.
Battery power is low - Battery is drained, charge it.
Faulty starter motor - Starter should be replaced.
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