Mitsubishi 6D16 Troubleshooting
| Engine Model: Mitsubishi 6D16 |
| Engine Type: 4-cycle inline 6-cylinder liquid-cooled diesel |
| Total Displacement: 460 cu.in (7.55 L) |
| Rated Engine Power: 160-170 Hp (118-125 kW) at 2800 rpm |
| Fuel System Type: Direct injection |
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| Engine starts up hard or won't start |
Fuel filter element is dirty - Clean or replace the filter.
Air in the fuel system - Air bleeding.
Clogged or burnt injection nozzle - Clean or change injection nozzles.
Fuel injection pump is not working correctly - Change pump or rebuild it.
Improper valve timing - Correct or change timing gear.
Restricted fuel pipes - Service or replace fuel pipes.
Injection timing is incorrect - Adjust injection timing as required.
Piston rings and cylinder are worn - Replace faulty components.
| Engine starts but immediately stalls |
Fuel filter plugged - Replace filter element.
Damaged fuel injection pump - Install a new pump or rebuild.
Dirty air filter - Clean or change.
Incorrect nozzle opening pressure - Set it correctly.
| Engine shuts off suddenly while running |
Fuel injection timing is not adjusted - Adjust the pump as required.
Fuel filter plugged - Filter maintenance required.
Coolant temperature is low - Normalize the temperature by warming up the engine.
Injection nozzles are stuck or clogged - Change or repair injection nozzles.
| Engine stalls while idling |
Low idle speed set incorrectly - Correct the settings.
Improper valve clearance - Adjust valve clearance.
Damaged fuel injection pump - Rebuild or install a new injection pump.
| Engine power is insufficient |
Fuel injection nozzles are faulty or clogged - Test injection nozzles and change if necessary.
Fuel lines or hoses are dirty - Fuel lines and hoses need to be cleaned.
Plugged air filter - Change air filter element.
Cylinder head gasket is worn - Change cylinder head gasket.
Injection timing is incorrect - Adjust according to specifications.
Fuel injection pump is damaged - Change or repair the pump.
Any of moving engine components is faulty - Change or repair damaged parts.
Faulty radiator cap or dirty radiator fins - Clean radiator or install new cap.
Low engine coolant - Add coolant fluid and inspect the cooling system for leaks.
Loose or defective fan belt - Belt change is required.
Insufficient engine oil - Fill up the engine oil.
Cylinder head gasket defective - Install a new gasket.
Injection timing is improper - Set the injection timing correctly.
| Oil pressure is insufficient |
Engine oil insufficient - Fill crankcase to proper oil level.
Oil pump is defective - Repair or replace.
Dirty oil filter - Replace or service engine oil filter.
Relief valve is stuck or broken - Replace or service relief valve.
Clearance of crankshaft bearing is excessive - Inspect and change or repair worn components.
Excessive oil clearance of crankpin bearing - Inspect and change or repair worn components.
| Diesel engine consuming too much oil |
Oil leaks: Damaged seals or gaskets - Worn parts need to be replaced.
Crankcase oil too light - Fill up with the proper oil viscosity.
Stuck or worn piston rings - Piston rings replacement required.
Valve guides and stems are worn - Valves must be replaced.
Pistons or cylinder liners are scuffed - Inspect pistons and liners, fit new components as necessary.
| Abnormal engine knocking or noise |
Engine not warmed up - Normalize the temperature by warming up the engine.
Engine oil level is insufficient - Check oil level and add oil as required.
Fuel injection pump timing is wrong - Adjust as recommended.
Scored or worn pistons - Replace the pistons.
Connecting rod is misaligned or defective - Connecting rod needs to be aligned or changed.
Low battery output voltage - Battery is drained, recharge it.
Battery is draining quickly - Service battery or change it.
Battery terminals are corroded or wires are disconnected - Connect wires properly or change terminals.
Battery is low or faulty - Replace or charge as required.
Battery wiring is disconnected or improperly connected - Inspect wiring and connect as required.
Low battery output - Battery needs to be recharged.
Starter motor failing - Change or repair starter.
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