Mitsubishi S16R Troubleshooting
| Engine Model: Mitsubishi S16R |
| Engine Type: 4-cycle 16-cylinder V-block turbocharged liquid-cooled diesel |
| Total Displacement: 3,989 cu.in (65.37 L) |
| Rated Engine Power: 1944-2823 Hp (1450-2105 kW) at 1500-1800 rpm |
| Fuel System Type: Direct injection |
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| Engine starts up hard or will not start |
Dirty fuel filter - Change the filter element.
Air trapped in fuel system - Bleed air.
Clogged or defective injection nozzles - Check and replace nozzles if required.
Faulty fuel injection pump - Replacement or repair required.
Incorrect valve timing - Use correct valve timing adjustment.
Fuel pipes clogging - Clean fuel pipes.
Injection timing is incorrect - Adjust injection timing as required.
Piston rings and cylinder are worn - Change faulty parts.
| Diesel starts but immediately stops |
Fuel filter element clogging - Clean or replace the filter.
Faulty fuel injection pump - Replace injection pump or repair it.
Plugged air cleaner - Clean or change.
Unadjusted nozzle opening pressure - Set it correctly.
| Engine stops suddenly during operation |
Timing of fuel injection pump is incorrect - Check the fuel injection pump timing adjustment.
Fuel filter plugged - Change the filter element.
Engine is not warmed up to the required temperature - Warm up the engine.
Stuck or burnt injection nozzle - Change or repair injection nozzles.
Low idle speed adjustment is incorrect - Adjust as required.
Valve out of adjustment - Adjust valve clearance.
Fuel injection pump is broken - Rebuild or change fuel pump.
| Diesel engine loses power |
Clogged injection nozzle - Change fuel injection nozzles.
Restricted fuel hoses or lines - Fuel hoses and lines must be clean.
Plugged air cleaner - Clean air cleaner element.
Cylinder head gasket defective - Install a new gasket.
Wrong injection timing - Check injection timing adjustment.
Fuel injection pump failure - Replacement or repair required.
One of moving engine parts has broken - Change or repair damaged parts.
Faulty radiator cap or dirty radiator fins - Change cap or clean radiator.
Lack of coolant in cooling system - Refill to the correct level and inspect system for leaks.
Loose or damaged fan belt - Change as required.
Engine oil insufficient - Checking oil level and add if necessary.
Cylinder head gasket is defective - Gasket should be replaced.
Improper injection timing - Set the injection timing correctly.
Low oil level - Checking oil level and add if necessary.
Oil pump malfunction - Check and replace if necessary.
Oil filter clogged - Replace or service engine oil filter.
Stuck or defective relief valve - Replace or clean relief valve.
Clearance of crankshaft bearing is excessive - Inspect and replace or repair faulty components.
Excessive crankpin bearing clearance - Check and replace or repair defective parts.
| Engine consuming too much oil |
Oil leaking: Damaged gaskets or seals - Replace to repair leaks.
Oil viscosity is incorrect - Use oil of correct viscosity.
Piston rings are defective or worn - Replace piston rings.
Valve guides and stems are worn - Install new valves.
Damaged pistons or cylinder liners - Check pistons and liners, install new parts as required.
Low coolant temperature - Engine is not warmed up to the required temperature.
Engine oil insufficient - Check oil level and add oil as required.
Fuel injection pump timing is not adjusted - Adjust fuel injection pump as required.
Pistons are worn or broken - Have pistons replaced.
Connecting rod is misaligned or worn - Replace or align connecting rod.
Low battery capacity - Low battery charging, charge as required.
Battery will not hold charge - Service battery or replace it.
Disconnected wires or corroded battery terminals - Connect wiring correctly or install new terminals.
Battery is low or faulty - Change or recharge battery.
Wiring harness is disconnected or improperly connected - Check wiring harness and connect as required.
Low battery output voltage - Charge the battery.
Damaged starter motor - Change or repair starter.
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