Mitsubishi S6K-T Troubleshooting
| Engine Model: Mitsubishi S6K-T |
| Engine Type: 4-cycle inline 6-cylinder turbocharged liquid-cooled diesel |
| Total Displacement: 389 cu.in (6.37 L) |
| Rated Engine Power: 140-180 Hp (103-134 kW) at 2200 rpm |
| Fuel System Type: Direct injection |
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| Engine starts up hard or doesn't start |
Fuel filter plugging - Filter maintenance required.
Air in the fuel lines - Bleed the fuel lines.
Fuel injection nozzles are faulty or clogged - Change fuel injection nozzles.
Defective fuel injection pump - Rebuild or replace pump.
Unadjusted valve timing - Correct or change timing gear.
Restricted fuel pipes - Clean or replace fuel pipes.
Incorrect injection timing - Set the injection timing correctly.
Excessive wear of piston rings and cylinder - Replace defective parts.
| Engine stalls after starting |
Dirty fuel filter - Change filter element.
Fuel injection pump damage - Rebuild or replace pump.
Air filter plugged - Replace air filter element.
Nozzle opening pressure is improper - Adjust according to specifications.
| Engine shuts off while running |
Fuel injection timing is wrong - Adjust the pump as required.
Dirty fuel filter - Clean or replace the filter.
Low coolant temperature - Warm up the engine.
Injection nozzles are burnt or jammed - Change or repair injection nozzles.
| Engine stalls when idling |
Incorrectly set low idle speed - Correct low idle adjustment.
The valve clearance is not adjusted - Check and adjust as required.
Fuel injection pump is broken - Change pump or rebuild it.
Clogged or burnt injection nozzle - Service or change injection nozzles.
Dirty fuel lines or hoses - Clean fuel system lines and hoses.
Dirty air filter - Air filter maintenance required.
Cylinder head gasket is defective - Install new cylinder head gasket.
Unadjusted injection timing - Adjust as recommended.
Fuel injection pump malfunctioning - Change or repair the pump.
One of moving engine parts is faulty - Replace or repair damaged components.
Faulty radiator cap or dirty radiator fins - Clean radiator or replace cap.
Insufficient coolant fluid - Add coolant fluid to cooling system and also check it for leaks.
Fan belt is loose or defective - Fan belt must be replaced.
Engine oil insufficient - Fill up the oil to required level.
Blown cylinder head gasket - Gasket should be replaced.
Incorrect injection timing - Check injection timing adjustment.
| Oil pressure is insufficient |
Insufficient engine oil - Checking oil level and add if necessary.
Defective oil pump - Remove and inspect oil pump.
Oil filter element clogged - Replace or clean engine oil filter element.
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 crankpin bearing clearance - Check and replace or repair defective parts.
| Diesel engine using too much oil |
Oil leaking: Seals or gaskets are defective - Defective components must be replaced.
Oil viscosity is incorrect - Fill up with the proper oil viscosity.
Damaged or seized piston rings - Have piston rings replaced.
Valve guides or stems are damaged - Valves replacement required.
Cylinder liners or pistons are scored - Check liners and pistons, replace as required.
Engine is cold - Warm up engine as required.
Insufficient engine oil - Check and refill engine oil.
Improper setting of fuel injection pump timing - Adjust fuel injection pump as required.
Pistons are worn or broken - Pistons need to be replaced.
Connecting rod is misaligned or defective - Replace or align connecting rod.
Low battery power - Recharge the battery.
Battery will not hold charge - Service or change the battery.
Bad terminals or disconnected battery cables - Connect cables properly or replace terminals.
Battery is drained or worn - Recharge or replace battery.
Battery wires are disconnected or incorrectly connected - Check wires and connect correctly.
Low battery capacity - Charge the battery.
Starter motor is defective - Repair or change starter.
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