FEDERAL MOGUL 498NP Piston Pin Nos 1181AP .040 4CYL 2.5L

( Brand: Federal Mogul ), ( Manufacturer Part Number: 498NP ), ( Part Type: Piston Pin ), ( Oe Spec Or Performance/custom: Oe Spec ), ( Ipn: 1181ap ), ( Vintage Part: Yes ), ( Country Of Origin: United States ), ( Performance Part: No )

Review FEDERAL MOGUL Piston Pin Amc Jeep Pontiac .040 4cyl 2.5l Nos Usa fits EAGLE 1982–1986

The **Federal Mogul 498NP Piston Pin** is a precision-engineered, high-performance replacement component designed specifically for the **2.5L (151 cubic inch) inline-four (040) engine** found in **1982 through 1986 AMC Eagle, Jeep Eagle, and Pontiac Phoenix** vehicles. This critical part plays a vital role in maintaining optimal engine efficiency, durability, and performance by securely connecting the piston to the connecting rod within the cylinder bore. Crafted from **high-strength, heat-treated steel**, the 498NP piston pin is engineered to withstand the extreme forces and thermal cycling inherent in high-revving, high-compression applications, ensuring reliable operation even under demanding driving conditions. Its **smooth, polished surface** minimizes friction and wear, reducing the risk of premature failure while enhancing overall engine longevity. The pin features a **precision-ground diameter** and **tight tolerances** to guarantee a snug fit within the piston s bushings and the connecting rod s small end, preventing excessive play that could lead to catastrophic engine damage. Whether used in a **restoration project, performance upgrade, or routine maintenance**, this Federal Mogul piston pin is a trusted OEM-quality replacement that adheres to strict manufacturing standards, delivering the same level of reliability as the original equipment. Ideal for mechanics and enthusiasts seeking a **direct-fit, no-compromise solution**, the 498NP is a must-have component for preserving the integrity of this iconic engine family, ensuring smooth operation and peak performance for years to come.

### **Pros and Cons of Buying a Federal Mogul 498NP Piston Pin (1982 1986 AMC Jeep Eagle/Pontiac 040 4-Cylinder 2.5L NOS)**

#### **Pros**

1. **Original Equipment Quality (OEM)**

The Federal Mogul 498NP piston pin is a genuine replacement part designed to match the original specifications of the 2.5L AMC Jeep Eagle/Pontiac 040 engine. This ensures proper fitment, performance, and longevity when installed correctly.

2. **New Old Stock (NOS) Condition**

Since the part is NOS, it is unused and in pristine condition, free from wear, corrosion, or damage. This eliminates concerns about premature failure or compatibility issues that can arise with used or aftermarket parts.

3. **Reliability and Durability**

The 2.5L AMC engine, while not the most robust, benefits from high-quality components like the 498NP pin. Properly maintained, these engines can last well over 100,000 miles, especially in classic vehicles where lower RPM and occasional use reduce stress on internal parts.

4. **Ease of Installation**

The 498NP is a straightforward component to replace, requiring only basic tools and mechanical knowledge. Many aftermarket guides and videos are available for this engine, making DIY installation feasible for those with moderate experience.

5. **Compatibility with Modifications**

If you plan to modify the engine (e.g., porting, cam upgrades, or forced induction), a high-quality piston pin like the 498NP provides a solid foundation. It can handle mild performance tweaks without compromising reliability.

6. **Availability of Supporting Parts**

Since this is an older but still somewhat common engine, you can find supporting parts (e.g., rings, bearings, gaskets) from reputable brands like Federal Mogul, Fel-Pro, or Sealed Power. This makes a full rebuild or maintenance easier.

7. **Historical and Nostalgic Value**

For enthusiasts who appreciate classic American muscle cars and compact engines, restoring or maintaining a 2.5L AMC-powered vehicle can be rewarding. The 498NP is a small but meaningful part of that legacy.

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#### **Cons**

1. **Limited Aftermarket Support**

While the 498NP is a solid part, aftermarket alternatives (e.g., forged pins, high-stress components) are rare for this specific engine. If you push the engine hard (e.g., forced induction, aggressive camshafts), you may need to source specialized parts, which can be expensive or difficult to find.

2. **Potential for Engine Wear Over Time**

The 2.5L AMC engine is known for its aluminum block and head, which can be prone to warping, cracking, or oil leaks if not properly maintained. Even with a quality piston pin, neglect in other areas (e.g., timing belt, valve train, or cooling system) can lead to catastrophic failure.

3. **Higher Cost Relative to Other Options**

NOS Federal Mogul parts are typically more expensive than budget aftermarket alternatives. For example, a used or reconditioned piston pin might be cheaper, though it could introduce unknown variables like wear or improper machining.

4. **Specialized Knowledge Required**

The 2.5L AMC engine has unique quirks, such as a dry-sump lubrication system (in some models) or a tendency to overheat if not properly cooled. Installing the 498NP correctly requires understanding these nuances to avoid issues like piston-to-wall contact or bearing failure.

5. **Limited Long-Term Data on Modified Engines**

While the 498NP is reliable in stock or mildly modified form, there is less documented experience with heavily modified versions of this engine. Forcing the engine beyond its intended limits (e.g., high boost, aggressive cams) could void the benefits of the NOS pin.

6. **Potential for Counterfeit or Mismatched Parts**

Since NOS parts are not actively produced, there is a risk of encountering counterfeit or mismatched replacements if purchasing from untrusted sellers. Always verify the authenticity of the part and its packaging.

7. **Environmental and Practical Challenges**

The 2.5L AMC engine is not as common as modern powerplants, so finding mechanics or dealerships familiar with it can be difficult. This may require additional research or travel to specialized shops for maintenance.

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### **Conclusion**

The Federal Mogul 498NP piston pin is an excellent choice for restoring or maintaining a 1982 1986 AMC Jeep Eagle/Pontiac 040 2.5L engine. Its OEM quality, NOS condition, and reliability make it a safe and high-performing option for stock or mildly modified applications. However, it is not a "set-and-forget" part proper engine maintenance, cooling, and lubrication are critical to preventing issues like warping, leaks, or premature wear.

For enthusiasts who prioritize authenticity, performance, and longevity without aggressive modifications, the 498NP is a strong recommendation. Those planning heavy modifications should research supporting components and consider whether the engine s limitations align with their goals.

### **Recommendation**

- You are restoring or maintaining the engine in stock or near-stock condition.

- You value OEM quality and NOS reliability.

- You are willing to invest in proper maintenance (oil changes, cooling system checks, timing belt replacement).

- You have access to resources (manuals, forums, or mechanics) familiar with the 2.5L AMC engine.

- You plan to heavily modify the engine (e.g., forced induction, aggressive cams) without additional supporting upgrades.

- You cannot commit to regular maintenance or cooling system upkeep.

- You are on a tight budget and can source a high-quality used or reconditioned pin instead.

Ultimately, the 498NP is a sound investment for those who appreciate classic engines and are prepared to care for them properly. For high-performance applications, a more comprehensive engine rebuild or upgrade plan may be necessary.

Details:

Federal Mogul new old stock made in the USA and superior quality compared to pistons. Listing is for one piston.

part #: 498np prices

• $19.58-$74.95

specifications cranshafengin:

• for models: Eagle
• for makes: Amc, Jeep, Eagle, Pontiac
• for years: 1982-1986
• brand: Federal Mogul
• mpn: 498np
• part type: Piston Pin
• oe spec or performance/custom: Oe Spec
• ipn: 1181ap
• vintage part: Yes
• country of origin: United States
• performance part: No

payments cranshafengin:

• credit card: Visa
• wallet: Paypal
• other

shipping cranshafengin:

• carrier: USPS
• service: USPS Ground Advantage
• class: Standard
• transit: 5-12 Days
• type: Calculated
• cost: $0.00

general cranshafengin:

• condition: New
• Car Truck Parts Accessories > Engines Engine Parts > Crankshafts

returns cranshafengin:

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

seller cranshafengin:

• rating: 99.7%
• city: Leitchfield, Kentucky
• # reviews: 1651

offer cranshafengin:

• availability: In Stock
• options: Ship-to-home
• sold: 0
• started: February 20, 2026
• quantity: 2

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