Mitsubishi S4E2 Troubleshooting
| Engine Model: Mitsubishi S4E2 |
| Engine Type: 4-cycle inline 4-cylinder naturally aspirated liquid-cooled diesel |
| Total Displacement: 180.5 cu.in (2.96 L) |
| Rated Engine Power: 59 Hp (44.1 kW) at 2400 rpm |
| Fuel System Type: Indirect fuel injection |
____________________________________________________________________________________
| Engine starts up hard or will not start |
Fuel filter element is dirty - Change filter element.
Air trapped in fuel system - Bleed air.
Faulty or dirty injection nozzles - If necessary, replace with a new nozzle.
Fuel injection pump failure - Repair or install a new fuel pump.
Valve timing is out of adjustment - Adjust or replace timing gear.
Fuel pipes are plugged - Service fuel pipes.
Injection timing is out of adjustment - Set up as recommended.
Damaged piston rings and cylinder - Replace faulty parts.
| Engine starts and stops suddenly |
Fuel filter plugged - Service or replace the filter.
Fuel injection pump failure - Replace or repair injection pump.
Air filter clogged - Clean or replace the element.
Incorrect nozzle opening pressure - Set up as recommended.
| Diesel shuts off while driving |
Fuel injection timing is wrong - Adjust according to specifications.
Fuel filter element is dirty - Change filter element.
Coolant temperature is low - Normalize the temperature by warming up the engine.
Defective or stuck injection nozzles - Clean or change injection nozzles.
Improperly adjusted low idle speed - Test and adjust.
Valve out of adjustment - Need to adjust valve clearance.
Fuel injection pump is broken - Replacement or repair required.
| Diesel engine loses power |
Faulty or dirty injection nozzles - Change fuel injection nozzles.
Fuel lines or hoses are clogged - Fuel hoses and lines must be clean.
Air cleaner is dirty - Carry out maintenance on air filter.
Worn cylinder head gasket - Change cylinder head gasket.
Injection timing is incorrect - Use correct injection timing adjustment.
Fuel injection pump is broken - Replacement or repair required.
One of moving engine components is worn - Replace or repair damaged components.
Radiator fins are clogged or radiator cap is faulty - Clean radiator or install new cap.
Lack of engine coolant - Fill radiator to proper level and check components for faults.
Loose or damaged fan belt - Change the fan belt.
Engine oil level is insufficient - Check oil level and add oil as required.
Cylinder head gasket is blown - Gasket should be replaced.
Injection timing is incorrect - Adjust as recommended.
Low oil level - Check oil level and add oil as required.
Oil pump is worn or damaged - Check and replace if necessary.
Clogged oil filter element - Clean or replace engine oil filter element.
Relief valve is stuck or broken - Change or service relief valve.
Excessive crankshaft bearing clearance - Check and change or repair defective parts.
Clearance of crankpin bearing is excessive - Inspect and replace or repair faulty components.
| Excessive oil consumption |
Oil leakage: Worn gaskets or seals - Defective components must be replaced.
Improper oil viscosity - Fill up with the proper oil viscosity.
Piston rings are defective or worn - Have piston rings replaced.
Valve guides or stems are damaged - Valves must be replaced.
Pistons or cylinder liners are worn - Check pistons and liners, change as required.
Engine is not fully warmed up - Warm up the engine.
Insufficient engine oil - Fill the crankcase with engine oil.
Improper fuel injection timing - Adjust as recommended.
Scored or worn pistons - Have pistons replaced.
Connecting rod is worn or misaligned - Replace or align connecting rod.
Low battery power - Charge the battery.
Battery won’t hold charge - Service charging system or install new battery.
Bad battery terminals or disconnected wiring - Check cable connections and replace or service terminals.
Battery is low or faulty - Replace or charge as required.
Battery cables are disconnected or improperly connected - Inspect cables and connect properly.
Battery capacity is low - Low battery charging, charge as required.
Starter motor is damaged - Starter needs to be changed.
____________________________________________________________________________________
| Industrial Engines Technical Specifications |
| Car Engines Technical Specifications |
| Small Engines Technical Specifications |
| Outboard Engines Technical Specifications |
