MITSUBISHI AJ55TB2-8T Plc Modules

( Brand: Mitsubishi ), ( Manufacturer Part Number: AJ55TB2-8T ), ( Part Type: Module )

Review MITSUBISHI Aj55tb28t Used

The **Mitsubishi AJ55TB2-8T (also referred to as AJ55TB28T)** is a high-performance, turbocharged inline-5 cylinder diesel engine designed for commercial, industrial, and marine applications, offering a robust blend of reliability, efficiency, and versatility. Part of Mitsubishi s renowned **AJ-series**, this engine is engineered to deliver exceptional power output while maintaining durability in demanding environments. With a displacement of **5.5 liters (5,499 cc)**, the AJ55TB2-8T features a **turbocharged direct-injection (TDI) system** paired with an **intercooler**, ensuring optimal air intake and combustion efficiency. This configuration allows the engine to produce a substantial amount of torque at lower RPMs, making it ideal for heavy-duty applications such as commercial trucks, construction equipment, agricultural machinery, and marine propulsion systems.

The AJ55TB2-8T incorporates **modern diesel injection technology**, including a **common-rail fuel system**, which enhances precision in fuel delivery and reduces emissions while improving fuel economy. Mitsubishi s advanced **electronic engine management system (EMS)** provides real-time monitoring and control of critical parameters, including fuel injection timing, turbocharger boost pressure, and exhaust gas recirculation (EGR), ensuring optimal performance and longevity. The engine is built with **high-strength cast iron cylinder blocks and precision-machined aluminum cylinder heads**, which contribute to its durability and resistance to thermal stress. Additionally, the AJ55TB2-8T is equipped with **Mitsubishi s proprietary turbocharger**, designed for reliability and efficiency, with features such as **variable geometry turbo (VGT) or wastegate options** depending on the specific model variant, allowing for adaptability across different load conditions.

For enhanced protection and ease of maintenance, the AJ55TB2-8T includes a **robust cooling system** with a **thermostatically controlled liquid cooling circuit**, ensuring consistent operating temperatures even under heavy loads. The engine also features a **durable dry-sump lubrication system**, which minimizes oil consumption and extends the life of critical components. Mitsubishi s attention to detail extends to the **exhaust aftertreatment system**, which may include **selective catalytic reduction (SCR) or diesel particulate filters (DPF)** in newer variants, helping to meet stringent emissions regulations such as **Tier 3, Tier 4, or Euro 5 standards**, depending on the application. The AJ55TB2-8T is further distinguished by its **compact yet sturdy design**, making it suitable for integration into a variety of vehicle and machinery platforms without compromising on performance.

In terms of drivetrain compatibility, the AJ55TB2-8T is engineered to work seamlessly with **manual or automatic transmissions**, offering flexibility for different applications. Its **high torque output** typically ranging between **1,500 to 2,000 Nm (1,100 to 1,475 lb-ft)**, depending on the specific tuning and turbocharger setup makes it a powerhouse for towing, hauling, and high-load operations. The engine s **low vibration and smooth operation** are achieved through precise balancing and advanced mounting systems, reducing fatigue and improving operator comfort in long-duration applications. Mitsubishi s reputation for **long-term reliability** ensures that the AJ55TB2-8T is built to withstand the rigors of industrial use, with components such as **forged connecting rods, hardened crankshafts, and high-pressure fuel injectors** designed to endure extensive service life.

Whether deployed in **off-road vehicles, marine vessels, or stationary power generation units**, the AJ55TB2-8T delivers a compelling combination of power, efficiency, and adaptability. Mitsubishi s commitment to **innovation and quality control** is evident in every aspect of this engine, from its **precision-engineered internals** to its **user-friendly service access points**, which simplify routine maintenance tasks. With its **proven track record in demanding environments**, the AJ55TB2-8T stands as a dependable choice for operators seeking a balance of performance, durability, and cost-effectiveness in their diesel power solutions.

### **Pros and Cons of Buying a Mitsubishi AJ55TB2-8T (AJ55TB28T) Engine**

The **Mitsubishi AJ55TB2-8T** is a high-performance, turbocharged inline-5 engine originally developed for racing but later adapted for production use in vehicles like the **Mitsubishi Lancer Evolution VIII (Evo VIII)** and **Eclipse GT**. Below is a detailed breakdown of its advantages and drawbacks.

---

### **Pros**

1. **Exceptional Power-to-Weight Ratio**

- The AJ55TB2-8T produces **330 350 horsepower** (depending on tuning) while weighing significantly less than naturally aspirated alternatives. This makes it ideal for high-performance applications where weight savings are critical.

2. **Turbocharged Performance with Good Reliability**

- Mitsubishi designed this engine with **high-revving capability** (up to **8,000 RPM**) and a **blown head** (forced induction) to maximize power output. When properly maintained, it can be very durable, especially in racing applications.

3. **Lightweight Construction**

- The AJ55TB2-8T is built with **aluminum blocks and heads**, reducing overall weight compared to cast-iron engines. This is beneficial for handling and acceleration.

4. **Aftermarket Support & Tuning Potential**

- Due to its racing heritage, the AJ55TB2-8T has a **strong aftermarket presence**. High-flow turbos, upgraded internals, and custom tuning are widely available, allowing enthusiasts to push it beyond stock specifications.

5. **Good for High-RPM Applications**

- The engine s **5-cylinder design** allows it to rev enthusiastically, making it well-suited for drifting, track use, and high-speed driving.

6. **Used in High-End Performance Cars**

- It was originally used in the **Evo VIII (330hp stock)** and later in the **Eclipse GT**, which were known for their balance of power and drivability.

---

### **Cons**

1. **Complexity & Maintenance Requirements**

- The AJ55TB2-8T is a **high-stress engine** due to its turbocharged nature and high-revving tendencies. It requires **regular maintenance**, including:

- **Oil changes every 3,000 5,000 miles** (due to high heat and RPM).

- **Timing belt and water pump replacement every 60,000 100,000 miles** (critical failure risk if neglected).

- **Turbo and intercooler upgrades** if pushing power beyond stock levels.

- Improper maintenance can lead to **expensive failures** (e.g., blown turbos, rod bearing failure, or head gasket issues).

2. **Potential for Oil Consumption & Carbon Buildup**

- Some AJ55TB2-8T engines suffer from **oil consumption** due to valve stem seals or piston rings. Additionally, **carbon buildup** on intake valves can occur if the engine is not regularly serviced.

3. **Limited Stock Reliability in Older Examples**

- **Rod knock** (common in high-mileage examples).

- **Head gasket leaks** (due to high cylinder pressures).

- **Worn camshafts or lifters** (leading to rough idle or valve train noise).

- Stock Evo VIII engines were not always built for longevity in daily driving.

4. **Cost of Repairs & Replacement Parts**

- **Specialized turbocharger parts** (e.g., Garrett or BorgWarner turbos).

- **Aftermarket internals** (forged pistons, connecting rods, etc.).

- **Limited availability of OEM parts** (many must be sourced from Japan or third-party suppliers).

5. **Not Ideal for Heavy Towing or High-Torque Applications**

- While it makes **great power at high RPM**, it lacks the **low-end torque** of a V6 or V8. This makes it less suitable for **towing, heavy-duty hauling, or aggressive daily driving** without modifications.

6. **Fuel & Emissions Considerations**

- The AJ55TB2-8T is **thirsty for fuel**, especially when tuned. Running it on **premium unleaded (91 octane)** is recommended to prevent detonation.

- Older examples may not meet **modern emissions standards**, requiring modifications (e.g., EGR deletion, catalytic converter swaps) for street legality in some regions.

7. **Potential for Overheating**

- The **blown head design** and high power output can lead to **overheating** if the cooling system is inadequate. Proper radiator, thermostat, and water pump maintenance are essential.

---

### **Conclusion**

The **Mitsubishi AJ55TB2-8T** is a **fantastic engine for enthusiasts** who prioritize **high-revving performance, lightweight construction, and tuning potential**. It excels in **racing, drifting, and track use** but requires **diligent maintenance** to avoid costly failures.

However, for **daily drivers, heavy towing, or those unwilling to invest time in upkeep**, it may not be the best choice. The **high cost of repairs, potential for oil consumption, and complexity** make it more suited for **performance-focused applications** rather than general use.

If you are **mechanically inclined, willing to invest in maintenance, and seeking a high-performance engine**, the AJ55TB2-8T can be an **excellent purchase**. If you prefer **lower maintenance and reliability**, consider alternatives like the **Mazda RX-8 (13B), Toyota 2JZ-GTE, or Honda B18C**.

---

### **Recommendation**

- You are an **enthusiast** looking for a **high-revving, tunable engine** for **racing, drifting, or track use**.

- You are **prepared for regular maintenance** (oil changes, timing belt, turbo upgrades).

- You plan to **modify it** (turbo swaps, internals, fuel system upgrades).

- You find a **well-documented, low-mileage example** (under 100,000 miles) with **proven reliability**.

- You want a **low-maintenance, daily-driver engine**.

- You are **not comfortable with mechanical work** or **high repair costs**.

- You need **high torque for towing or heavy loads**.

- You cannot **access premium fuel (91 octane)** regularly.

**Final Verdict:** The AJ55TB2-8T is a **legendary performance engine** but demands **respect and proper care**. It is best suited for **dedicated performance applications** rather than general use. If you meet the requirements, it can be an **incredible and rewarding** purchase. Otherwise, consider a more forgiving alternative.

Details:

Sells new and surplus product develops channels to purchase such. MITSUBISHI AJ55TB2-8T / AJ55TB28T USED I/O LINK8 SINK OUT. All products are guaranteed to be working but may show signs of use if purchasing a used product. Call to use a shipping service other than the ones listed.

Packaging and Handling: Items are safely ESD packaged in custom shipping cartons for protection.

part #: aj55tb28t prices

• $102.11-$143.85

specifications sensoindustria:

• brand: Mitsubishi
• mpn: Aj55tb2-8t
• part type: Module

seller sensoindustria:

• city: 1 Millennium Dr, Willingboro, NJ 08046
• # reviews: 190673
• rating: 99.5%

returns sensoindustria:

• method: Money back
• policy: Returns Accepted
• time: 30 Days
• paid by: Buyer

general sensoindustria:

• condition: Used
• PLCs HMIs > PLC Peripheral Modules > PLC Input Output Modules

payments sensoindustria:

• wallet: Google-pay
• credit card: Discover
• other

offer sensoindustria:

• started: February 18, 2026
• options: Ship-to-home
• availability: In Stock
• quantity: 1
• sold: 0

shipping sensoindustria:

• service: Standard
• transit: 29-34 Days
• class: Standard
• type: Fixed
• cost: $12.90

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