Cat 3608 Troubleshooting
| Engine Model: Caterpillar 3608 |
| Engine Type: 4-stroke inline 8-cylinder turbocharged liquid-cooled diesel |
| Total Displacement: 8,909 cu.in (146 L) |
| Rated Engine Power: 2,300-3,300 Hp (1,715-2,460 kW) at 1000 rpm |
| Fuel System Type: Unit Injector |
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| Engine starts hard or won't start |
Fuel filter plugged - Change filter element.
Air in fuel tank - Bleed fuel tank.
Fuel injection nozzles are faulty or clogged - If necessary, replace with a new nozzle.
Damaged fuel injection pump - Replace injection pump or repair it.
Valve timing is wrong - Use correct valve timing adjustment.
Restricted fuel pipes - Clean or change fuel pipes.
Improper injection timing - Use correct injection timing adjustment.
Piston rings and cylinder are worn - Replace defective parts.
| Engine starts but then stalls |
Clogged fuel filter - Service the filter.
Fuel injection pump malfunctioning - Repair or replace injection pump.
Clogged air filter - Change air filter element.
Improper nozzle opening pressure - Adjust as recommended.
| Engine stops suddenly during operation |
Improper fuel injection timing - Adjust the pump as required.
Dirty fuel filter - Change filter element.
Low coolant temperature - Warm up to required temperature.
Injection nozzles are burnt or jammed - Clean or change injection nozzles.
Low idle speed setting is incorrect - Adjust low idling as recommended.
Incorrect valve clearance - Correct valve clearance needs to be set.
Fuel injection pump malfunctioning - Install a new pump or rebuild.
Defective injection nozzle - Service or change injection nozzles.
Restricted fuel hoses or lines - Service fuel hoses and lines.
Dirty air filter - Change air filter element.
Cylinder head gasket is damaged - Install new cylinder head gasket.
Injection timing is wrong - Set the injection timing correctly.
Fuel injection pump is defective - Replacement or repair required.
Any of moving engine parts is worn - Change or repair damaged parts.
Faulty radiator cap or dirty radiator fins - Change cap or clean radiator.
Lack of engine coolant - Fill the cooling system and check components for leaks or other faults.
Fan belt slipping or worn - The fan belt needs to be replaced.
Engine oil level low - Check oil level and add oil as required.
Leaking cylinder head gasket - Install new cylinder head gasket.
Wrong injection timing - Set the injection timing correctly.
Lack of oil - Check and refill the oil.
Oil pump failure - Inspect and change as required.
Dirty oil filter element - Service or replace engine oil filter.
Relief valve is stuck or worn - Replace or service relief valve.
Excessive crankshaft bearing clearance - Test and repair or replace worn parts.
Crankpin bearing clearance is excessive - Inspect and replace or repair faulty components.
| Engine consuming too much oil |
Oil leakage: Worn gaskets or seals - Replace to repair leaks.
Incorrect oil viscosity - Use correct viscosity oil.
Worn or stuck piston rings - Change the piston rings as required.
Valve guides or stems are damaged - Valves need to be changed.
Damaged cylinder liners or pistons - Inspect pistons and liners, fit new components as necessary.
| Abnormal engine knocking or noise |
Engine not warmed up - Normalize the temperature by warming up the engine.
Engine oil insufficient - Need to add engine oil.
Fuel injection pump timing is not adjusted - Use the correct fuel injection pump timing adjustment.
Worn or scored pistons - Pistons need to be replaced.
Misaligned or defective connecting rod - Need to replace or align the connecting rod.
Battery capacity is low - Charge the battery.
Battery drains quickly - Service charging system or change battery.
Battery terminals are corroded or wires are disconnected - Connect wiring correctly or install new terminals.
Battery is drained or defective - Change or recharge battery.
Battery wires are disconnected or incorrectly connected - Check wires and connect correctly.
Low battery output - Charge the battery.
Starter motor failure - Starter should be replaced.
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