Mitsubishi 6D22 Troubleshooting
| Engine Model: Mitsubishi 6D22 |
| Engine Type: 4-cycle inline 6-cylinder liquid-cooled diesel |
| Total Displacement: 680.4 cu.in (11.15 L) |
| Rated Engine Power: 225 Hp (168 kW) at 2200 rpm |
| Fuel System Type: Direct injection |
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| Diesel engine hard to start or doesn't start |
Dirty fuel filter - Filter maintenance required.
Air trapped in fuel system - Bleed air.
Defective or clogged injection nozzle - Install a new kit of correctly balanced nozzles.
Damaged fuel injection pump - Repair or replace injection pump.
Valve timing is improper - Adjust or change timing gear.
Dirt in the fuel lines or hoses - Clean or replace fuel pipes.
Wrong injection timing - Set up as recommended.
Worn piston rings and cylinder - Change faulty parts.
| Engine starts but stalls suddenly |
Fuel filter element is clogged - Service or replace the filter.
Fuel injection pump is broken - Install a new pump or rebuild.
Plugged air filter - Clean air cleaner element.
Nozzle opening pressure is incorrect - Adjust as recommended.
| Engine stalls after running |
Wrong setting of fuel injection pump timing - Adjust fuel injection pump as required.
Dirty fuel filter - Service or replace the filter.
Engine not warmed up - Warm up engine as required.
Stuck or clogged injection nozzle - Clean or replace injection nozzles.
Low idle speed adjustment is incorrect - Need to adjust idle speed.
Incorrect valve clearance - Adjust valve clearance.
Fuel injection pump is faulty - Replace injection pump or repair it.
Defective injection nozzle - Clean or replace injection nozzles.
Restricted fuel lines or hoses - Fuel lines and hoses need to be cleaned.
Air filter plugged - Service or replace the air filter.
Leaking cylinder head gasket - Gasket should be replaced.
Unadjusted injection timing - Adjust injection timing as required.
Fuel injection pump is defective - Change or repair the pump.
Any of moving engine parts is worn - Repair or replace defective components.
Defective radiator cap or clogged radiator fins - Change cap or clean radiator.
Lack of engine coolant - Add coolant fluid and inspect the cooling system for leaks.
Fan belt is broken or worn - The fan belt needs to be replaced.
Engine oil level is low - Add oil to the engine crankcase.
Cylinder head gasket is blown - Replace the gasket as required.
Incorrect injection timing - Set up as recommended.
| Oil pressure is insufficient |
Insufficient engine oil - Add oil to the engine crankcase.
Oil pump is defective - Install a new pump.
Oil filter element clogged - Change or clean engine oil filter element.
Relief valve is seized or worn - Replace or service relief valve.
Excessive oil clearance of crankshaft bearing - Test and repair or replace worn parts.
Excessive oil clearance of crankpin bearing - Test and repair or replace worn parts.
| High engine oil consumption |
Oil leakage: Damaged gaskets or seals - Change worn parts according to specifications.
Oil viscosity is wrong - Use oil of proper viscosity.
Worn or stuck piston rings - Have piston rings replaced.
Worn valve stems and valve guides - Valves must be replaced.
Scuffed pistons or cylinder liners - Check pistons and liners, replace as required.
Engine is not warmed up to the required temperature - Warm up to required temperature.
Engine oil level is low - Add oil to the engine crankcase.
Incorrect adjustment of fuel injection pump timing - Check the fuel injection pump timing adjustment.
Pistons are scored or worn - Pistons replacement required.
Misaligned or faulty connecting rod - Need to change or align the connecting rod.
Low battery voltage - Charge the battery.
Battery drains quickly - Service battery or replace it.
Disconnected wiring or bad battery terminals - Check cables and service or change terminals.
Battery is low or faulty - Charge or replace the battery.
Wiring is incorrectly connected or disconnected - Inspect wiring and connect correctly.
Battery power is low - Battery needs to be recharged.
Starter motor is defective - Starter should be replaced.
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