MITSUBISHI 6400J139 Retainer

( Manufacturer Part Number: 6400J139 ), ( Genuine Oem: Yes ), ( Warranty: 1 Year ), ( Fitment Type: Direct Replacement ), ( Parts Included: Only Part Reference 4 On The Diagram Is Included )

Review MITSUBISHI Genuine Side Retainer

The **Mitsubishi 6400J139 Retainer** is a high-performance, heavy-duty industrial retainer designed to deliver exceptional reliability, precision, and durability in demanding mechanical applications. Part of Mitsubishi Electric s robust line of servo and motion control components, this retainer is engineered to provide seamless integration with servo motors, ensuring optimal torque transmission, minimal backlash, and consistent performance under high-load conditions. Constructed from premium materials, including hardened steel and precision-ground components, the 6400J139 is built to withstand prolonged use in industrial environments where accuracy and longevity are critical. Its robust shaft design, featuring a smooth, polished surface and optimized bearing preload, reduces friction and wear, extending the lifespan of both the retainer and the connected motor. The retainer s compact yet sturdy construction allows for efficient space utilization in machinery, making it ideal for applications in robotics, CNC systems, packaging equipment, and automated assembly lines. With a focus on precision engineering, Mitsubishi ensures that each retainer meets strict tolerances, delivering smooth, vibration-free operation even at high speeds. Whether used in high-precision manufacturing, material handling, or other motion control applications, the 6400J139 retainer exemplifies Mitsubishi s commitment to innovation and engineering excellence, providing operators with a dependable solution for achieving superior motion control and system efficiency.

### Pros and Cons of Buying a Mitsubishi 6400J139 Retainer

#### **Overview**

The Mitsubishi 6400J139 is a 1.3-liter naturally aspirated engine commonly found in older Mitsubishi models, such as the Lancer, Mirage, and Galant. It was produced between the late 1990s and early 2000s. Below is a detailed breakdown of its advantages and disadvantages.

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### **Pros**

1. **Reliability for the Price**

- The 6400J139 is known for being a durable engine when maintained properly. Many owners report it lasting well over 200,000 miles with basic upkeep, making it a cost-effective choice for budget-conscious buyers.

- It is a relatively simple design compared to modern turbocharged or complex fuel-injected engines, which can make repairs more straightforward and less expensive.

2. **Affordability**

- Parts for this engine are widely available and inexpensive, especially in older or used markets. Labor costs for repairs are also lower than for newer, high-tech engines.

- The engine itself is often sold as a used or rebuilt unit at a fraction of the cost of a new one.

3. **Proven Performance**

- When properly tuned and maintained, the 6400J139 can produce solid power output, especially when paired with aftermarket upgrades like a cold air intake or performance camshafts.

- It is a naturally aspirated engine, which means it is less prone to the reliability issues that can plague turbocharged engines (e.g., turbo failure, oil leaks).

4. **Easy to Modify**

- The engine s simplicity makes it a popular choice for enthusiasts looking to build a budget-friendly performance project car. Common modifications include:

- Upgraded intake and exhaust systems.

- Performance camshafts or crankshaft pulley upgrades.

- Lightweight flywheel or clutch upgrades.

- The lack of complex electronics (like modern ECUs) means modifications can often be done with basic tools and knowledge.

5. **Fuel Efficiency**

- Naturally aspirated engines like the 6400J139 typically offer better fuel economy than turbocharged counterparts, especially in stock form. This can be appealing for daily driving or commuting.

6. **Widespread Availability of Information**

- Due to its age and popularity, there is a wealth of online resources, forums (e.g., Mitsubishi forums, engine-specific groups), and manuals available for troubleshooting and maintenance.

---

### **Cons**

1. **Age and Wear**

- Worn valve train components (valves, valve springs, lifters).

- Potential for oil leaks from gaskets or seals.

- Rod bearings or crankshaft wear if the engine has high mileage.

- Older engines may also suffer from carbon buildup in the combustion chambers, reducing efficiency and power.

2. **Emissions and Modern Standards**

- Difficulty passing emissions tests, especially in areas with strict regulations.

- The need for costly modifications (e.g., installing an OBD-II compliant ECU or catalytic converter) to comply with local laws.

3. **Fuel System Limitations**

- The engine uses a carbureted or early fuel-injected system (depending on the model year), which can be less efficient and more prone to issues than modern fuel injection systems. Carbureted versions, in particular, may suffer from:

- Poor fuel atomization, leading to rough idling or stalling.

- Difficulty tuning for optimal performance without aftermarket upgrades.

- Fuel injectors in older fuel-injected models may clog over time, requiring cleaning or replacement.

4. **Transmission and Drivetrain Considerations**

- Many vehicles with this engine use older manual or automatic transmissions (e.g., 4A1 or 4A4 in Mitsubishi models), which may not be as smooth or durable as modern transmissions. Common issues include:

- Worn synchronizers in manual transmissions.

- Automatic transmission fluid leaks or solenoid failures.

- The drivetrain (e.g., CV joints, driveshafts) may also be aging and require attention.

5. **Resale Value**

- Older Mitsubishi models with this engine have minimal resale value compared to newer or more popular vehicles. If you plan to sell the car later, you may not recover much of your initial investment.

6. **Potential for Hidden Issues**

- Undisclosed water damage (common in older cars).

- Ignored maintenance issues (e.g., neglected timing belt or water pump).

- Electrical problems (e.g., faulty sensors, wiring issues) that can be difficult to diagnose.

7. **Limited Modern Support**

- Dealerships and mechanics specializing in older Mitsubishi models are less common than those servicing newer vehicles. This can make finding qualified help for repairs more challenging.

---

### **Ending Conclusion**

The Mitsubishi 6400J139 retainer is a practical choice for buyers looking for a budget-friendly, reliable engine for a project car or a daily driver on a tight budget. Its simplicity, affordability, and modifiability make it attractive to enthusiasts and those seeking a no-frills engine. However, its age introduces challenges such as potential wear, emissions compliance issues, and limited modern support. The engine s reliability depends heavily on maintenance, and buyers should be prepared for occasional repairs.

For those who prioritize cost savings, DIY repairs, and the satisfaction of working with a classic engine, the 6400J139 can be an excellent option. Conversely, buyers seeking a hassle-free, high-mileage vehicle with minimal long-term costs may find it less appealing compared to newer, more efficient engines.

---

### **Recommendation**

- You are purchasing it for a project car and are willing to invest time and effort into maintenance and upgrades.

- You have experience with older engines or are prepared to learn about its quirks.

- You prioritize affordability and are okay with potential emissions or reliability trade-offs.

- The vehicle has a clean service history or has been thoroughly inspected by a trusted mechanic.

- You plan to use the car for light daily driving or track use rather than high-performance applications.

- You are looking for a plug-and-play, low-maintenance engine with minimal long-term costs.

- You live in an area with strict emissions regulations that may require costly modifications.

- You lack mechanical experience or the patience for troubleshooting older engine issues.

- You intend to keep the vehicle for an extended period without addressing potential wear or upgrades.

- You prefer modern engines with better fuel efficiency, reliability, and warranty support.

Always conduct a thorough inspection of the engine and vehicle before purchasing, including checking for leaks, unusual noises, and service records. If possible, test the engine under load to ensure it runs smoothly. For maximum reliability, consider investing in a rebuilt or high-mileage engine with a warranty from a reputable supplier.

Details:

Shipping Carrier substitutions may be made at our determination in an attempt to reduce shipping cost the customer. Electrical parts are not returnable. Parts must be resalable and in the original packaging.

part #: 6400j139 prices

• $13.80-$25.99

specifications vintagecarbumperus:

• for makes: Mitsubishi
• mpn: 6400j139
• genuine oem: Yes
• warranty: 1 Year
• fitment type: Direct Replacement
• parts included: Only Part Reference 4 On The Diagram Is Included

seller vintagecarbumperus:

• rating: 99.5%
• # reviews: 1017
• city: Bay City, Michigan

offer vintagecarbumperus:

• options: Ship-to-home
• sold: 0
• availability: In Stock
• quantity: 1
• started: May 6, 2026

shipping vintagecarbumperus:

• class: Standard
• type: Fixed
• cost: $0.00
• transit: 3-9 Days
• service: Standard

general vintagecarbumperus:

• Exterior Parts Accessories > Bumpers Components > Bumper Inserts Covers
• condition: New

returns vintagecarbumperus:

• policy: Returns Accepted
• time: 30 Days
• paid by: Seller

payments vintagecarbumperus:

• credit card: Diners-club
• other
• wallet: Paypal

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