Isuzu 3LD2 Troubleshooting
| Engine Model: Isuzu 3LD2 |
| Engine Type: 4-stroke in-line 3-cylinder liquid-cooled diesel |
| Total Displacement: 91.3 cu.in (1.49 L) |
| Rated Engine Power: 37.5 Hp (27.5 kW) at 3000 rpm |
| Fuel System Type: Indirect injection |
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| Engine difficult to start or doesn't start |
Dirty fuel filter - Service or replace the filter.
Air in fuel system - Bleed fuel system.
Faulty fuel injection nozzles - Change fuel injection nozzles.
Fuel injection pump is not working correctly - Repair or change injection pump.
Valve timing is incorrect - Set the valve timing correctly.
Fuel pipes are plugged - Clean or change fuel pipes.
Incorrect injection timing - Adjust injection timing as required.
Excessive wear of piston rings and cylinder - Replace defective components.
| Engine starts but stalls suddenly |
Dirty fuel filter - Clean the filter element.
Fuel injection pump damage - Replacement or repair required.
Dirty air filter - Change air filter element.
Improper nozzle opening pressure - Set up as recommended.
| Diesel shuts off while driving |
Improper fuel injection timing - Adjust the pump as required.
Dirty fuel filter - Change the filter element.
Engine not warmed up - Normalize the temperature by warming up the engine.
Stuck or burnt injection nozzle - Repair or replace injection nozzles.
Wrong adjustment of low idle speed - Correct low idle settings.
Valve clearance is out of adjustment - Check and adjust as required.
Fuel injection pump is broken - Install a new pump or rebuild.
Faulty or dirty injection nozzles - Replace injection nozzles.
Dirty fuel hoses or lines - Clean fuel system hoses and lines.
Air filter is clogged - Change air filter element.
Cylinder-head gasket is broken - Change cylinder head gasket.
Unadjusted injection timing - Set up as recommended.
Fuel injection pump failure - Repair or change injection pump.
Any of moving engine parts is worn - Repair or replace defective components.
Clogged radiator core or leaking radiator cap - Change cap or clean radiator.
Low coolant level - Add coolant fluid and inspect the cooling system for leaks.
Broken or loose fan belt - Change the fan belt.
Engine oil level is low - Check and refill engine oil.
Worn cylinder head gasket - Change cylinder head gasket.
Injection timing is out of adjustment - Adjust injection timing as required.
Not enough oil in the engine - Fill crankcase to proper oil level.
Oil pump failure - Repair or replace.
Oil filter is clogged - Service or replace engine oil filter.
Stuck or worn relief valve - Relief valve need to be replaced or cleaned.
Excessive crankshaft bearing clearance - Test and repair or replace worn parts.
Excessive oil clearance of crankpin bearing - Test and repair or replace worn parts.
| Diesel engine consuming too much oil |
Oil leakage: Seals or gaskets are defective - Replace to repair leaks.
Oil viscosity is incorrect - Use proper viscosity oil.
Stuck or worn piston rings - Piston rings replacement required.
Worn valve stems and valve guides - Replace the valves.
Pistons or cylinder liners are scuffed - Check pistons and liners, replace as required.
Engine is not fully warmed up - Engine is not warmed up to the required temperature.
Engine oil level low - Check and refill engine oil.
Improper fuel injection timing - Set the fuel pump timing correctly.
Scored or worn pistons - Pistons replacement required.
Connecting rod is worn or misaligned - Need to replace or align the connecting rod.
Battery voltage is low - Low battery charging, charge as required.
Battery will not hold charge - Service charging system or replace battery.
Corroded battery terminals or disconnected wires - Connect wiring correctly or install new terminals.
Battery is drained or defective - Recharge or replace battery.
Battery wires are disconnected or incorrectly connected - Check wires and connect correctly.
Battery voltage is low - Charge the battery.
Starter motor is faulty - Starter needs to be replaced.
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