Mitsubishi 8DC10 Troubleshooting
| Engine Model: Mitsubishi 8DC10 |
| Engine Type: 4-cycle 8-cylinder V-block naturally aspirated liquid-cooled diesel |
| Total Displacement: 1022.3 cu.in (16.75 L) |
| Rated Engine Power: 330 Hp (246 kW) at 2200 rpm |
| Fuel System Type: Direct injection |
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| Engine hard to start or will not start |
Fuel filter element is clogged - Change the filter element.
Air in fuel system - Bleed fuel system.
Damaged or dirty injection nozzles - Clean or replace injection nozzles.
Fuel injection pump is not working correctly - Change pump or rebuild it.
Valve timing is incorrect - Use correct valve timing adjustment.
Fuel pipes are dirty - Clean or replace fuel pipes.
Injection timing is out of adjustment - Adjust as recommended.
Damaged piston rings and cylinder - Replace faulty components.
| Engine starts and then shuts off |
Fuel filter element clogging - Filter maintenance required.
Fuel injection pump is damaged - Install a new pump or rebuild.
Air filter element clogged - Service air cleaner.
Nozzle opening pressure is not adjusted - Adjust as recommended.
| Engine stops unexpectedly during operation |
Wrong setting of fuel injection pump timing - Adjust fuel injection pump as required.
Fuel filter element is clogged - Clean the filter element.
Engine is not preheated - Engine is not warmed up to the required temperature.
Defective or stuck injection nozzles - Repair or change injection nozzles.
Low idle speed setting is incorrect - Normalize low idle speed.
Valve clearance is not correct - Adjust valve clearance.
Fuel injection pump damage - Install a new pump or rebuild.
Damaged or dirty injection nozzles - Clean or change injection nozzles.
Fuel lines or hoses are clogged - Service fuel lines and hoses.
Plugged air cleaner - Clean or change the filter.
Cylinder head gasket defective - Gasket should be replaced.
Unadjusted injection timing - Adjust as recommended.
Fuel injection pump is faulty - Repair or replace injection pump.
One of moving engine parts has broken - Replace or repair damaged components.
Radiator fins are dirty or radiator cap is defective - Replace cap or clean radiator.
Insufficient coolant fluid - The cooling system needs to be refilled and checked for faults.
Excessive wear of the fan belt - If necessary, replace the belt.
Low engine oil level - Check and refill engine oil.
Worn cylinder head gasket - Gasket should be replaced.
Unadjusted injection timing - Adjust as recommended.
| Oil pressure is insufficient |
Oil level is insufficient - Add oil as required.
Oil pump is worn or damaged - Check and replace if necessary.
Clogged oil filter element - Change or service engine oil filter.
Stuck or worn relief valve - Change or service relief valve.
Excessive oil clearance of crankshaft bearing - Inspect and replace or repair faulty components.
Crankpin bearing clearance is excessive - Test and repair or replace worn parts.
| Diesel engine consuming too much oil |
External oil leaks: Gaskets or seals can be faulty - Replace to repair leaks.
Oil viscosity is wrong - Use proper viscosity oil.
Piston rings are stuck or worn - Change the piston rings as required.
Damaged valve stems or valve guides - Install new valves.
Pistons or cylinder liners are scuffed - Check liners and pistons, install new components as required.
Engine is not warmed up to the required temperature - Warm up engine as required.
Engine oil level low - Fill the crankcase with engine oil.
Improper fuel injection timing - Adjust fuel injection pump as required.
Worn or scored pistons - Have pistons replaced.
Connecting rod is misaligned or worn - Replace or align connecting rod.
Low battery output voltage - Charge the battery.
Battery does not hold charge - Service battery or replace it.
Terminals are faulty or battery cables are disconnected - Check cables and service or change terminals.
Battery is low or faulty - Replace or charge as required.
Disconnected or incorrectly connected wires - Inspect battery wires and connect correctly.
Battery power is low - Charge the battery.
Starter motor failing - Repair or change starter.
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