Isuzu 6BG1T Troubleshooting
| Engine Model: Isuzu 6BG1T |
| Engine Type: 4-cycle inline 6-cylinder direct injection liquid-cooled diesel |
| Total Displacement: 396 cu.in (6.49 L) |
| Rated Engine Power: 150-200 Hp (111-148 kW) at 2600 rpm |
| Aspiration Type: Turbocharged |
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| Diesel engine hard to start or doesn't start |
Fuel filter plugged - Clean or replace the filter.
Air in the fuel system - Air bleeding.
Clogged injection nozzle - Change fuel injection nozzles.
Fuel injection pump is broken - Change or repair the pump.
Valve timing is out of adjustment - Correct or change timing gear.
Fuel pipes clogging - Service or change fuel pipes.
Improper injection timing - Use correct injection timing adjustment.
Excessive wear of piston rings and cylinder - Change defective components.
| Engine starts but then stops |
Fuel filter plugged - Clean the filter or install new filter element.
Fuel injection pump is faulty - Repair or install new pump.
Air filter element clogged - Change air filter element.
Nozzle opening pressure is incorrect - Set it correctly.
| Diesel shuts off while driving |
Timing of fuel injection pump is incorrect - Set it up as required.
Fuel filter plugging - Filter maintenance required.
Engine is not warmed up to the required temperature - Normalize the temperature by warming up the engine.
Injection nozzles sticking or clogged - Clean or replace injection nozzles.
| Engine stalls when idling |
Incorrect low idle setting - Adjust low idle speed.
The valve clearance is incorrect - Need to adjust valve clearance.
Fuel injection pump is defective - Repair or change injection pump.
Defective injection nozzle - Clean or change injection nozzles.
Fuel lines or hoses are dirty - Service fuel lines and hoses.
Air filter plugged - Change air filter element.
Cylinder head gasket is defective - Gasket should be replaced.
Unadjusted injection timing - Adjust according to specifications.
Fuel injection pump is defective - Change or repair the pump.
One of moving engine components has failed - Replace or repair damaged components.
Radiator fins are clogged or radiator cap is faulty - Install new cap or clean radiator.
Not enough coolant - Top up coolant fluid and check system for leaks.
Fan belt is worn or faulty - Change as required.
Not enough engine oil - Add oil to the engine crankcase.
Cylinder-head gasket is leaking - Install new cylinder head gasket.
Unadjusted injection timing - Check injection timing adjustment.
Oil level is low - Fill crankcase to proper oil level.
Oil pump is damaged - Remove and inspect oil pump.
Oil filter clogged - Service or replace engine oil filter.
Relief valve is stuck or broken - 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.
| Engine using too much oil |
External oil leaks: Worn gaskets or seals - Worn parts need to be replaced.
Oil viscosity is wrong - Use correct viscosity oil.
Piston rings are stuck or worn - Piston rings need to be replaced.
Worn valve stems and valve guides - Valves must be replaced.
Worn cylinder liners or pistons - Check pistons and liners, install new parts as required.
Low coolant temperature - Engine is not warmed up to the required temperature.
Engine oil insufficient - Need to add engine oil.
Timing of fuel injection pump is incorrect - Set the fuel pump timing correctly.
Piston wear or scoring - Replace the pistons as required.
Connecting rod is worn or not aligned - Connecting rod must be aligned or replaced.
Low battery output voltage - Battery is drained, recharge it.
Battery does not hold charge - Service battery or change it.
Disconnected cables or faulty battery terminals - Check wiring and clean or replace terminals.
Battery is drained or worn - Need to charge or replace the battery.
Battery wires are disconnected or incorrectly connected - Check wires and connect correctly.
Battery power is low - Battery is drained, recharge it.
Starter motor failure - Repair or change starter.
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