International D268 Troubleshooting
| Engine Model: International Harvester D268 |
| Engine Type: 4-cycle inline 4-cylinder naturally aspirated liquid-cooled diesel |
| Total Displacement: 268 cu.in (4.4 L) |
| Rated Engine Power: 80-82 Hp (60-61 kW) at 2300 rpm |
| Fuel System Type: Direct fuel injection |
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| Engine difficult to start or will not start |
Fuel filter element is clogged - Filter maintenance required.
There is air in the fuel system - Bleed the system.
Clogged or burnt injection nozzle - Clean or replace injection nozzles.
Fuel injection pump failure - Rebuild or replace pump.
Valve timing is incorrect - Use correct valve timing adjustment.
Fuel pipes are dirty - Clean or change fuel pipes.
Wrong injection timing - Adjust injection timing as required.
Damaged piston rings and cylinder - Change faulty components.
| Engine stalls after starting |
Clogged fuel filter - Service or replace the filter.
Faulty fuel injection pump - Install a new fuel pump or repair.
Clogged air filter element - Replace air filter element.
Nozzle opening pressure is incorrect - Adjust according to specifications.
| Engine stops suddenly during operation |
Fuel injection timing is not adjusted - Set up as recommended.
Fuel filter element clogging - Clean or replace the filter.
Coolant temperature is low - Engine is not warmed up to the required temperature.
Stuck or clogged injection nozzle - Service or change injection nozzles.
| Engine stops at low idle speed |
Too low idle RPM - Test and adjust.
The valve clearance is not adjusted - Correct valve clearance.
Damaged fuel injection pump - Rebuild or change fuel pump.
Fuel injection nozzles are damaged or dirty - If necessary, replace with a new nozzle.
Fuel lines or hoses clogging - Clean fuel lines and hoses.
Intake air restriction - Change air filter element.
Cylinder head gasket is defective - Replace the gasket as required.
Wrong injection timing - Set up as recommended.
Faulty fuel injection pump - Repair or replace injection pump.
Any of moving engine components is faulty - Repair or replace defective components.
Radiator core is clogged or radiator cap is leaking - Install new cap or clean radiator.
Coolant level is low - Add coolant fluid to cooling system and also check it for leaks.
Fan belt is worn or faulty - Belt change is required.
Lack of engine oil - Need to add engine oil.
Damaged cylinder-head gasket - Replace cylinder head gasket.
Unadjusted injection timing - Adjust according to specifications.
Engine oil insufficient - Add oil to the engine crankcase.
Worn oil pump - Replace as required.
Plugged engine oil filter - Service or change engine oil filter element.
Stuck or worn relief valve - Replace or service relief valve.
Crankshaft bearing clearance is excessive - Check and change or repair defective parts.
Crankpin bearing clearance is excessive - Test and repair or replace worn parts.
| Diesel engine using too much oil |
Oil leaks: Gaskets or seals are excessively worn - Change to repair leaks.
Incorrect oil viscosity - Fill up with the correct oil viscosity.
Worn or stuck piston rings - Piston rings need to be replaced.
Valve stems and guides are worn - Replace the valves.
Scored pistons or cylinder liners - Check liners and pistons, install new components as required.
Engine is not preheated - Warm up the engine.
Low engine oil level - Fill up the oil to required level.
Incorrect adjustment of fuel injection pump timing - Adjust according to specifications.
Worn or broken pistons - Have pistons replaced.
Faulty or misaligned connecting rod - Alignment procedure or replacement is required.
Low battery power - Battery is drained, recharge it.
Battery drains quickly - Service or change the battery.
Disconnected cables or faulty battery terminals - Check cables and clean or change terminals.
| Starter motor is not working |
Battery is drained or defective - Recharge or replace battery.
Battery cables are disconnected or improperly connected - Inspect cables and connect properly.
Battery power is low - Battery needs to be recharged.
Damaged starter motor - Replace or repair starter.
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