International DT436 Troubleshooting
| Engine Model: International Harvester DT436 |
| Engine Type: 4-stroke in-line 6-cylinder turbocharged liquid-cooled diesel |
| Total Displacement: 436 cu.in (7.1 L) |
| Rated Engine Power: 140-180 Hp (104-134 kW) at 2600 rpm |
| Fuel System Type: Direct injection |
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| Engine starts hard or will not start |
Dirty fuel filter - Filter maintenance required.
Air in the fuel pipes - Bleed the fuel pipes.
Clogged or burnt injection nozzle - If necessary, replace with a new nozzle.
Damaged fuel injection pump - Repair or change injection pump.
Valve timing is wrong - Adjust or change timing gear.
Fuel pipes are dirty - Service or replace fuel pipes.
Improper injection timing - Adjust according to specifications.
Piston rings and cylinder are worn - Change defective parts.
| Diesel starts and suddenly stops |
Fuel filter plugging - Clean the filter or install new filter element.
Fuel injection pump is broken - Repair or install new pump.
Air cleaner is dirty - Install new air filter element.
Nozzle opening pressure is not adjusted - Set it correctly.
| Engine shuts off suddenly while running |
Wrong setting of fuel injection pump timing - Check the fuel injection pump timing adjustment.
Fuel filter element clogging - Change filter element.
Coolant temperature is low - Engine is not warmed up to the required temperature.
Injection nozzles are stuck or clogged - Clean or replace injection nozzles.
Incorrect low idle setting - Correct low idle adjustment.
Valve clearance is out of adjustment - Have it adjusted.
Defective fuel injection pump - Rebuild or change fuel pump.
| Diesel engine is losing power |
Clogged injection nozzle - Change fuel injection nozzles.
Dirty fuel hoses or lines - Fuel hoses and lines must be clean.
Restricted intake air - Clean or change.
Cylinder-head gasket is leaking - Replace the gasket as required.
Incorrect injection timing - Set up as recommended.
Fuel injection pump is defective - Rebuild or change fuel pump.
Any of moving engine components is faulty - Replace or repair damaged components.
Defective radiator cap or clogged radiator fins - Change cap or clean radiator.
Insufficient coolant fluid - Add coolant and check the components of cooling system.
Broken or loose fan belt - Fan belt must be replaced.
Not enough engine oil - Fill the crankcase with engine oil.
Worn cylinder head gasket - Change cylinder head gasket.
Unadjusted injection timing - Check injection timing adjustment.
Low oil level - Fill crankcase to proper oil level.
Oil pump is damaged - Repair or replace.
Oil filter element is dirty - Change or clean engine oil filter element.
Stuck or defective relief valve - Change or clean relief valve.
Excessive oil clearance of crankshaft bearing - Inspect and change or repair worn components.
Excessive oil clearance of crankpin bearing - Check and change or repair defective parts.
| Excessive oil consumption |
External oil leaks: Gaskets or seals are excessively worn - Worn parts need to be replaced.
Wrong oil viscosity - Use proper viscosity oil.
Stuck or defective piston rings - Piston rings replacement required.
Valve guides and stems are worn - Change the valves.
Cylinder liners or pistons are worn - Inspect liners and pistons, fit new parts as necessary.
Engine is not warmed up to the required temperature - Warm up to required temperature.
Lack of engine oil - Fill the crankcase with engine oil.
Improper fuel injection timing - Check the fuel injection pump timing adjustment.
Broken or worn pistons - Install new pistons.
Connecting rod is misaligned or defective - Align or change connecting rod.
Low battery output voltage - Battery is drained, recharge it.
Battery is not holding charge - Battery needs to be serviced or replaced.
Battery cables are disconnected or terminals are faulty - Connect wiring correctly or install new terminals.
Battery is drained or worn - Battery needs to be recharged or replaced.
Disconnected or incorrectly connected wires - Inspect battery wires and connect correctly.
Low battery output - Battery needs to be recharged.
Starter motor is defective - Repair or install a new starter.
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