Cat 3516B Troubleshooting
| Engine Model: Caterpillar 3516B |
| Engine Type: 4-stroke 16-cylinder V-block turbocharged liquid-cooled diesel |
| Total Displacement: 4,210 cu.in (69.1 L) |
| Rated Engine Power: 2145-3000 Hp (1600-2250 kW) at 1600 rpm |
| Fuel System Type: Electronic Unit Injector |
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| Engine starts hard or won't start |
Clogged fuel filter - Change filter element.
Air in fuel system - Bleed fuel system.
Clogged injection nozzle - Inspect nozzles and replace if necessary.
Damaged fuel injection pump - Replace or rebuild injection pump.
Valve timing is out of adjustment - Use correct valve timing adjustment.
Dirty fuel pipes - Service fuel pipes.
Injection timing is out of adjustment - Adjust according to specifications.
Cylinder or piston rings are worn - Change faulty parts.
| Diesel starts and suddenly stops |
Fuel filter element is clogged - Service or replace the filter.
Fuel injection pump is faulty - Repair or change injection pump.
Intake air restriction - Service air cleaner.
Unadjusted nozzle opening pressure - Set it correctly.
| Engine shuts off suddenly while running |
Improper fuel injection timing - Set up as recommended.
Fuel filter element is clogged - Clean or replace the filter.
Engine is cold - Warm up the engine.
Stuck or clogged injection nozzle - Change or repair injection nozzles.
Low idle speed setting is not correct - Normalize low idle speed.
Valve out of adjustment - Correct valve clearance needs to be set.
Fuel injection pump malfunctioning - Replacement or repair required.
| Engine is not running at maximum power |
Fuel injection nozzles are faulty or clogged - Install a new kit of correctly balanced nozzles.
Clogged fuel hoses or lines - Fuel hoses and lines must be clean.
Air filter is dirty - Change air filter element.
Defective cylinder head gasket - Cylinder-head gasket replacement required.
Unadjusted injection timing - Set the injection timing correctly.
Fuel injection pump failure - Replacement or repair required.
One of moving engine components has failed - Repair or replace defective components.
Faulty radiator cap or dirty radiator fins - Install new cap or clean radiator.
Lack of coolant in cooling system - Fill radiator to proper level and check components for faults.
Excessive wear of the fan belt - If necessary, replace the belt.
Engine oil insufficient - Check and refill engine oil.
Cylinder head gasket is defective - Replace the gasket as required.
Incorrect injection timing - Adjust as recommended.
| Insufficient oil pressure |
Low crankcase oil level - Checking oil level and add if necessary.
Oil pump malfunction - Install a new pump.
Clogged oil filter - Replace or service engine oil filter.
Worn or dirty relief valve - Change or clean relief valve.
Excessive oil clearance of crankshaft bearing - Test and repair or replace worn parts.
Crankpin bearing clearance is excessive - Check and change or repair defective parts.
| Engine oil consumption is too high |
Oil leakage: Damaged gaskets or seals - Defective components must be replaced.
Oil viscosity is wrong - Fill up with the proper oil viscosity.
Piston rings are stuck or worn - Piston rings replacement required.
Damaged valve guides or valve stems - Replace defective valves.
Cylinder liners or pistons are worn - Check liners and pistons, change as required.
| Engine knocking sound or abnormal noise |
Engine is cold - Warm up engine as required.
Low engine oil level - Check oil level and add oil as required.
Wrong setting of fuel injection pump timing - Adjust as recommended.
Pistons are worn or scored - Pistons replacement required.
Misaligned or defective connecting rod - Connecting rod needs to be aligned or changed.
Low battery voltage - Recharge the battery.
Battery discharges quickly - Service battery or change it.
Disconnected wires or corroded battery terminals - Check cable connections and replace or service terminals.
Battery is low or faulty - Need to charge or replace the battery.
Battery cables are disconnected or improperly connected - Inspect cables and connect properly.
Battery voltage is low - Charge the battery.
Faulty starter motor - Repair or replace starter.
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