A Comprehensive Guide to Troubleshooting Common Issues with Your Mitsubishi Engine
A Step-by-Step Troubleshooting Guide to Repairing Most Issues with Your Mitsubishi Engine
Including Specifications, Repairs, and Where to Buy a Quality Replacement Engine
Mitsubishi engines are extremely well known all over the world for their efficiency, performance, and durability. Whether you use a Mitsubishi diesel engine for industrial applications or a gas engine for automotive or genset applications, these engines are not only built to last but last for many years to come. Even the most durable of engines break down after some time, however, especially with a lack of maintenance. A Comprehensive Guide to Troubleshooting Common Issues with Your Mitsubishi Engine
In this detailed guide, we will walk you through the most common Mitsubishi engine problems, their diagnosis, and when to look for a replacement. Being expert suppliers of quality Mitsubishi engines, we not only inform you of the engine faults but give you the exact solutions needed, with both brand-new and remanufactured Mitsubishi engines for sale.
Why Mitsubishi Engines?
But before that, let’s discuss why Mitsubishi engines are so well-liked. Mitsubishi Heavy Industries produces many various engines that are renowned for:
- Durability: Long lifespan with low maintenance
- Fuel Efficiency: Great fuel efficiency, particularly in diesel engines
- Versatility: Applications in generators, heavy machinery, boats and vessels, and vehicles
- Ease of Maintenance: Simple designs make repairing and replacing parts easy
- Global Availability: Global application and support
These engines come in various models and sizes. Below are some key specifications of Mitsubishi’s most popular engine series.
Popular Mitsubishi Engine Series & Specifications
1. Mitsubishi S4S Diesel Engine
- Type: 4-Cylinder, Water-Cooled Diesel
- Displacement: 2.5 Liters
- Power Output: 36 – 50 HP (varies by configuration)
- Applications: Forklifts, generators, construction machinery
2. Mitsubishi 4D56 Diesel Engine
- Type: Inline-4, Turbocharged (available)
- Displacement: 2.5 Liters
- Power Output: 70 – 134 HP (turbocharged variants)
- Applications: SUVs, pickups, industrial vehicles
3. Mitsubishi 6D22 Diesel Engine
- Type: 6-Cylinder, Inline Diesel
- Displacement: 11.9 Liters
- Power Output: 215 – 285 HP
- Applications: Trucks, buses, marine engines
4. Mitsubishi 4G63 Gasoline Engine
- Type: 4-Cylinder, Inline Gas Engine
- Displacement: 2.0 Liters
- Power Output: 135 – 210 HP (turbocharged versions)
- Applications: Passenger cars, rally cars, modified builds
If you are shopping for any of these Mitsubishi engines, we sell them—fully tested, rebuilt, or brand new, as per your requirement.
Common Mitsubishi Engine Problems and How to Troubleshoot Them
Though Mitsubishi engines are built to last and perform, constant use leads to issues. Let us talk about the most common issues and how to troubleshoot them with ease.
1. Overheating Engine
Symptoms:
- High gauge temperature reading
- Steam from the hood
- Loss of engine power
Possible Causes:
- Low coolant level
- Faulty thermostat
- Water pump damaged
- Clogged radiator
Troubleshooting Steps:
- Inspect coolant levels and refill with the correct type
- Inspect hose and radiator leaks
- Replace a faulty thermostat
- Ensure the water pump works
When to Replace the Engine:
If overheating has caused internal damage (i.e., bent cylinder head or cracked block), it will be less expensive to buy a rebuilt Mitsubishi engine from us.
2. Hard Starting or No Start
Symptoms:
- Engine turns over but won’t start
- No engine turn at all
- Slow ignition
Common Causes:
- Faulty fuel pump or injectors (in diesels)
- Weak battery or filthy terminals
- Glow plug failure (for cold-start in diesels)
Troubleshooting Steps:
- Test battery and replace if undercharged
- Check and clean fuel injectors
- Check glow plugs for continuity
- Check fuel delivery system is working
Pro Tip: We sell Mitsubishi engine parts like glow plugs and injectors, or whole engines with all components installed and ready to go.
3. Abnormal Smoke Emission
Symptoms:
- White, blue, or black exhaust smoke
- Unusual odor
- Loss of power
Causes by Color:
- White Smoke: Coolant in combustion chamber (failed head gasket)
- Blue Smoke: Burning oil (piston ring or valve seal wear)
- Black Smoke: Dirty air filter or rich fuel mixture
Repairs:
- Replace valve seals
- Replace worn piston rings
- Replace air filters
- Test for head gasket failure (compression test)
- Full engine rebuild to be considered
Need a New Engine?
If the engine has high mileage and is smoking all the time, it is perhaps time to purchase a replacement Mitsubishi engine from our stock.
4. Low Oil Pressure
Symptoms:
- Oil light warning
- Ticking or knocking sounds
- Overheating
Probable Causes:
- Dirty or thin oil
- Worn oil pump
- Poor oil circulation caused by engine wear
Steps to Repair:
- Change the oil to manufacturer-recommended oil
- Replace and check oil pump if needed
- Replace oil pressure sensor
- Flush engine sludge
Engine Replacement Tip:
Low oil pressure that leads to knocking sounds typically points to serious internal damage. Shop our inventory of remanufactured Mitsubishi engines for a quick, permanent fix.
5. Loss of Power / Poor Acceleration
Symptoms:
- Sluggish throttle response
- Poor hill-climbing ability
- Reduced efficient fuel consumption
Causes:
- Turbocharger failure (if equipped)
- Clogged fuel filter
- Dirty air intake
- Faulty MAP and MAF sensors
Diagnosis:
- Replace air and fuel filters
- Clean intake manifold
- Check turbo operation
- Scan for error codes
If repairs are not sufficient to regain full performance, a reconditioned Mitsubishi engine is your best option.
6. Engine Knocking or Strange Noises
Symptoms:
- Knocking at idle or on acceleration
- Tapping or ticking sounds
- Metallic clanking
Common Causes:
- Worn rod bearings
- Poor lubrication
- Detonation due to poor fuel quality
Diagnosis:
- Run high-octane or correct fuel
- Replace worn bearings (engine teardown necessary)
- Maintain oil levels at the proper ranges
When Replacement Becomes Necessary:
Most clunks from the inside indicate that replacement or a rebuild is needed. We carry Mitsubishi gas and diesel engines and can send them out quickly.
When to Replace or Repair Your Mitsubishi Engine
| Condition | Recommended Action |
|---|---|
| Small items like filters, sensors | Repair |
| Head gasket leak | Repair or rebuild |
| Piston ring wear on cylinders, low compression | Rebuild or replace |
| Cracked block or seized engine | Replace |
| Over 200,000 miles with power loss | Replace |
We offer professional advice to help you decide whether you should buy a Mitsubishi engine or have your current one rebuilt.
Why Buy Mitsubishi Engines from Us?
Here’s what sets us apart:
✅ Huge Inventory: 4-cylinder to 6-cylinder gas and diesel engines
✅ Certified and Tested: All engine compression tested and inspected
✅ Warranty: Buy with confidence—warranty coverage available
✅ Affordable: Something for every budget
✅ Fast Shipping: Nationwide and worldwide delivery
Whether you need a Mitsubishi 4D56 diesel engine for your vehicle or a 6D22 industrial engine for business use, we have you covered.
Frequently Asked Questions (FAQs)
Q: Can I install the engine myself?
A: Yes, if you are mechanically savvy. Otherwise, professional installation is recommended for warranty verification.
Q: Are these engines new or rebuilt?
A: Yes, we have both. The condition is described in every product listing. All engines are tested and guaranteed to be running.
Q: Do you export?
A: Yes, we export Mitsubishi engines globally with freight available.
Q: What if I don’t know what engine I need?
A: Call us with your vehicle information or engine model. Our team will guide you to the correct engine.
Contact Us Today – Take Your Mitsubishi Engine Home Now
Troubleshooting is necessary, but occasionally the most sensible course of action is to simply stop pouring cash into fixing it and select a tried and tested alternative.
✅ Ready to purchase?
Look over our Mitsubishi engine inventory and have us quote you.
✅ Require assistance in selecting?
We have a support team that can provide expert advice on specs and fitment, so call them up.
Final Thoughts
Mitsubishi motors are great, though as with any machine, they do have an expiration date. Whether you’re attempting to troubleshoot the issue or a complete engine failure, you don’t have to go it alone. Not only do we provide the information to inform you on your motor—but the top Mitsubishi motors available with expert counsel, low prices, and quick shipping.
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