Mitsubishi 6D16T Troubleshooting
| Engine Model: Mitsubishi 6D16T |
| Engine Type: 4-cycle inline 6-cylinder turbocharged liquid-cooled diesel |
| Total Displacement: 460.5 cu.in (7.55 L) |
| Rated Engine Power: 203 Hp (151 kW) at 2800 rpm |
| Fuel System Type: Direct fuel injection |
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| Engine starts hard or will not start |
Dirty fuel filter - Install new filter element.
Air in fuel system - Bleed fuel system.
Fuel injection nozzles are faulty or clogged - If necessary, replace with a new nozzle.
Defective fuel injection pump - Repair or install new pump.
Valve timing is wrong - Correct or change timing gear.
Plugged fuel pipes - Service or replace fuel pipes.
Injection timing is wrong - Adjust injection timing as required.
Damaged piston rings and cylinder - Replace defective parts.
| Diesel starts but immediately stops |
Fuel filter plugged - Change filter element.
Damaged fuel injection pump - Replace injection pump or repair it.
Air filter is dirty - Clean air cleaner element.
Nozzle opening pressure is improper - Adjust according to specifications.
| Engine shuts off suddenly while running |
Incorrect adjustment of fuel injection pump timing - Adjust the pump as required.
Dirty fuel filter - Change the filter element.
Coolant temperature is low - Engine is not warmed up to the required temperature.
Injection nozzles are stuck or clogged - Check injection nozzles and replace if required.
| Engine stalls while idling |
Wrong adjustment of low idle speed - Adjust low idle speed.
Valve out of adjustment - Adjust valve clearance.
Fuel injection pump is damaged - Replacement or repair required.
Clogged or defective injection nozzles - Inspect nozzles and replace if necessary.
Dirt in the fuel lines or hoses - Service fuel lines and hoses.
Restricted intake air - Clean or change.
Cylinder head gasket is damaged - Change cylinder head gasket.
Incorrect injection timing - Use correct injection timing adjustment.
Fuel injection pump is broken - Repair or install new pump.
One of moving engine parts is faulty - Change or repair damaged parts.
Defective radiator cap or clogged radiator core - Install new cap or clean radiator.
Engine has a lack of coolant - Add coolant fluid to cooling system and also check it for leaks.
Damaged or worn fan belt - If necessary, replace the belt.
Engine oil level is low - Fill up the engine oil.
Defective cylinder head gasket - Install a new gasket.
Improper injection timing - Check injection timing adjustment.
Insufficient engine oil - Check and refill the oil.
Oil pump is defective - Remove and inspect oil pump.
Clogged oil filter element - Change or clean engine oil filter element.
Stuck or defective relief valve - Replace or service relief valve.
Excessive crankshaft bearing clearance - Inspect and replace or repair faulty parts.
Clearance of crankpin bearing is excessive - Inspect and change or repair worn components.
| Engine using too much oil |
Oil leakage: Worn gaskets or seals - New components need to be installed.
Oil viscosity is incorrect - Use correct viscosity oil.
Piston rings are stuck or worn - Replace piston rings.
Damaged valve stems or valve guides - Valves replacement required.
Pistons or cylinder liners are scored - Check pistons and liners, change as required.
| Abnormal engine knocking or noise |
Coolant temperature is low - Normalize the temperature by warming up the engine.
Engine oil insufficient - Check and refill engine oil.
Improper fuel injection timing - Check the fuel injection pump timing adjustment.
Piston wear or scoring - Pistons replacement required.
Misaligned or faulty connecting rod - Replace or align connecting rod.
Low battery output - Battery is drained, charge it.
Battery is draining quickly - Battery needs service or replacement.
Wires are disconnected or battery terminals are corroded - Check battery wires and service or replace terminals.
Battery is low or faulty - Change or recharge battery.
Wiring is improperly connected or disconnected - Check wiring and connect properly.
Low battery output - Battery is drained, charge it.
Starter motor is defective - Starter needs to be replaced.
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