International DT414 Troubleshooting
| Engine Model: International Harvester DT414 |
| Engine Type: 4-cycle inline 6-cylinder turbocharged liquid-cooled diesel |
| Total Displacement: 414 cu.in (6.8 L) |
| Rated Engine Power: 145-175 Hp (108-130 kW) at 2300 rpm |
| Fuel System Type: Direct fuel injection |
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| Engine starts up hard or won't start |
Clogged fuel filter - Clean or change the filter.
Air in the fuel system - Air bleeding.
Fuel injection nozzles are clogged or faulty - Check injection nozzles and replace if required.
Damaged fuel injection pump - Replace injection pump or repair it.
Incorrect valve timing - Use correct valve timing adjustment.
Dirt in the fuel lines or hoses - Service or change fuel pipes.
Improper injection timing - Use correct injection timing adjustment.
Excessive wear of piston rings and cylinder - Change defective parts.
| Engine starts but then stalls |
Fuel filter plugging - Change the filter element.
Fuel injection pump is faulty - Repair or install new pump.
Clogged air filter element - Air filter maintenance required.
Nozzle opening pressure is improper - Set up as recommended.
| Diesel shuts off while driving |
Improper fuel injection timing - Use the correct fuel injection pump timing adjustment.
Fuel filter element is dirty - Clean or change the filter.
Low coolant temperature - Normalize the temperature by warming up the engine.
Defective or stuck injection nozzles - Repair or change injection nozzles.
| Engine stalls at low idle speed |
Low idle speed set incorrectly - Adjust the low idle speed.
Valve clearance is not correct - Check and adjust as required.
Fuel injection pump is defective - Rebuild or change fuel pump.
| Engine power is insufficient |
Dirty or faulty injection nozzles - Inspect nozzles and replace if necessary.
Dirty fuel hoses or lines - Fuel hoses and lines must be clean.
Clogged air filter element - Replace air filter element.
Defective cylinder head gasket - Install new cylinder head gasket.
Improper injection timing - Adjust according to specifications.
Fuel injection pump is damaged - Replace or rebuild injection pump.
One of moving engine components has failed - Change or repair damaged parts.
Defective radiator cap or clogged radiator core - Clean radiator or change cap.
Engine has a lack of coolant - Add coolant fluid to cooling system and also check it for leaks.
Damaged or worn fan belt - Change as required.
Engine oil level low - Fill up the engine oil.
Cylinder-head gasket is broken - Change cylinder head gasket.
Injection timing is incorrect - Adjust injection timing as required.
Low oil level - Checking oil level and add if necessary.
Defective oil pump - Replace as required.
Oil filter is dirty - Service or change engine oil filter element.
Stuck or worn relief valve - Replace or clean relief valve.
Excessive crankshaft bearing clearance - Test and replace or repair worn components.
Crankpin bearing clearance is excessive - Test and replace or repair worn components.
| Excessive oil consumption |
Oil leaking: Gaskets or seals may be damaged - Replace worn parts to avoid leaks.
Wrong oil viscosity - Use correct viscosity oil.
Seized or wear piston rings - Replace piston rings.
Worn valve stems and valve guides - Replace defective valves.
Worn cylinder liners or pistons - Check pistons and liners, install new parts as required.
Engine not warmed up - Warm up engine as required.
Not enough engine oil - Add oil to the engine crankcase.
Fuel injection pump timing is wrong - Adjust as recommended.
Piston wear or scoring - Replace the pistons as required.
Connecting rod is misaligned or worn - Alignment procedure or replacement is required.
Low battery voltage - Battery is drained, recharge it.
Battery is draining quickly - Service charging system or change battery.
Disconnected cables or faulty battery terminals - Check cables and service or change terminals.
Battery is discharged or worn - Change or recharge battery.
Wiring harness is disconnected or improperly connected - Check wiring harness and connect as required.
Battery capacity is low - Recharge the battery.
Damaged starter motor - Repair or change starter.
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