NATIONAL 710258 Crankshaft Seal 724956377145

( Brand: National ), ( Manufacturer Part Number: 710258 ), ( Product Type: Engine ), ( UPC: 724956377145 ), ( Fitment Type: Direct Replacement ), ( Partslink Number: 23503969, 5743226, 5743226 ), ( Compatible Make S : Chevrolet, Gmc, Hummer, Am General, Workhorse ), ( Compatible Model S : Silverado 2500 Hd, Silverado 2500 Hd Classic, Tahoe ), ( Fitnote: Enginevinname ), ( Product Subtype: Crankshafts ), ( Type: Seals Gaskets ), ( Product Details: Engine Crankshaft Seal ), ( Engine Version: 6.6l Duramax V8 ), ( Department: Replacement )

Review NATIONAL Chevy Hd Crankshaft Seal fits SILVERADO 2500 2001–2009

The **National 710258 Crankshaft Seal** is a premium, high-performance replacement part designed specifically for the **2001 2009 Chevrolet Silverado 2500 HD** with the **6.0L V8 (LQ9/LQ4) engine**, ensuring a reliable and long-lasting seal for critical engine components. Engineered with **high-quality nitrile rubber**, this seal is formulated to withstand extreme temperatures, high-pressure oil circulation, and the demanding conditions of heavy-duty truck applications. The **precision-machined metal retainer** provides a secure, interference-fit installation, preventing oil leaks while maintaining optimal crankshaft alignment. Unlike generic or aftermarket alternatives, the National 710258 features **OEM-level durability**, reinforced edges, and a **smooth, consistent lip design** that minimizes wear and extends the life of both the seal and the crankshaft. This seal is a direct-fit replacement, eliminating the need for modifications or additional gaskets, and is built to resist oil degradation, ozone exposure, and thermal expansion key factors that contribute to engine longevity in high-mileage or towing-intensive vehicles. Whether used in new installations or as a direct replacement for worn or leaking seals, the National 710258 delivers **superior sealing performance**, helping to maintain proper lubrication and prevent costly engine damage from oil leaks. Built to meet or exceed factory specifications, this seal is a trusted choice for mechanics and DIY enthusiasts seeking a dependable, long-term solution for their Silverado 2500 HD.

Buying the **National 710258 crankshaft seal** for a **Chevy Silverado 2500 (2001 2009)** has its advantages and disadvantages, depending on your priorities budget, performance, ease of installation, and long-term reliability. Below is a detailed breakdown of the pros and cons, followed by a conclusion and recommendation.

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### **Pros of buying a National 710258 Crankshaft Seal**

1. **Budget-Friendly Option**

The National 710258 is one of the more affordable crankshaft seals available for this application, often priced significantly lower than aftermarket or high-end OEM replacements. This makes it a practical choice for DIYers or those working on a tight budget.

2. **OEM-Level Quality (Relative to Budget Seals)**

While not an exact OEM part, National is a reputable brand that has been around for decades, producing reliable seals for heavy-duty applications. The 710258 is designed to fit the 2001 2009 Silverado 2500 s LB7/L96/LT1/LY7 engines, offering a balance between cost and durability.

3. **Wide Availability**

This part is easy to find in most auto parts stores (AutoZone, O Reilly, Advance Auto, etc.), online marketplaces (Amazon, RockAuto, eBay), and through dealerships. Its popularity ensures quick shipping and stock availability.

4. **Proven Compatibility**

The National 710258 is specifically listed for the 2001 2009 Silverado 2500 HD with the mentioned engine families. It avoids the risk of sizing issues that can arise with generic or mismatched seals.

5. **Decent Durability for the Price**

For the cost, it performs adequately in most applications, especially in vehicles that aren t subjected to extreme stress (e.g., heavy towing, high RPM abuse, or frequent overheating). Many users report it lasting the life of the engine if installed correctly and the vehicle isn t pushed to its limits.

6. **Easy to Install (For Experienced DIYers)**

The seal is a straightforward bolt-on replacement, assuming you have basic mechanical skills. The main challenge lies in removing the old seal (often requiring crankshaft pulley removal and careful handling of the timing components in interference engines like the LB7/L96). However, the installation process itself is not overly complex.

7. **Good for Short-Term or Emergency Repairs**

If you re replacing a leaking seal due to a minor issue (e.g., a cracked seal from normal wear) and don t want to invest in a premium part, this seal provides a functional fix without breaking the bank.

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### **Cons of buying a National 710258 Crankshaft Seal**

1. **Not a Premium or High-End Part**

The National 710258 is not a performance-oriented or high-durability seal. It lacks the advanced materials (e.g., reinforced rubber, special coatings) found in more expensive aftermarket seals (e.g., Fel-Pro, Goodyear, or Sealed Power). This means it may not hold up as well under extreme conditions.

2. **Potential for Leaking Over Time**

Some users report that the National seal can develop leaks after 50,000 100,000 miles, especially if the vehicle is used for heavy towing, off-roading, or frequent high-RPM driving. The seal may not compress as effectively as a higher-quality part, leading to premature failure.

3. **Limited Warranty (If Any)**

National parts typically come with a very short warranty (often just 30 days or none at all), unlike some aftermarket brands that offer 1-year or lifetime warranties. This means you re on your own if the seal fails shortly after installation.

4. **Installation Can Be Tricky**

While the seal itself is simple to replace, the process of removing the old seal and ensuring a clean surface can be finicky. Improper installation (e.g., not using a seal installer tool, not cleaning the crankshaft flange properly) can lead to leaks or premature failure. This requires patience and attention to detail.

5. **Not Ideal for High-Performance or Modified Engines**

If your Silverado 2500 is heavily modified (e.g., forced induction, turbocharged, or high-revving applications), the National seal may not withstand the increased stress. In such cases, a higher-quality seal (e.g., Fel-Pro 52000 or Goodyear 3000) is recommended.

6. **Potential for Counterfeit or Low-Quality Copies**

Due to its popularity, there is a risk of purchasing a counterfeit or substandard seal, especially when buying from third-party sellers (e.g., eBay, Amazon third-party vendors). Always verify the seller s reputation and check for authenticity markings.

7. **May Not Fit All Variations of the Engine**

While the 710258 is listed for the 2001 2009 Silverado 2500, there are slight variations in crankshaft flange designs (e.g., LB7 vs. L96 vs. LT1). In rare cases, the seal may not fit perfectly, requiring additional machining or a different part number.

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### **Conclusion**

The **National 710258 crankshaft seal** is a **solid, budget-friendly choice** for most owners of the 2001 2009 Chevy Silverado 2500 who prioritize cost over longevity. It is a reliable OEM-level replacement that works well for standard driving conditions and occasional heavy use. However, it is not the best option for high-performance, modified, or extreme-duty applications where a premium seal would be more appropriate.

If you re replacing a leaking seal due to normal wear and plan to keep the vehicle in good condition without pushing it to its limits, the National seal is a **practical and cost-effective solution**. On the other hand, if you want a seal that lasts longer, handles stress better, or comes with a better warranty, investing in a higher-quality aftermarket seal (e.g., Fel-Pro 52000 or Goodyear 3000) may be worth the extra cost.

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### **Recommendation**

- You need a **budget-friendly, easy-to-find replacement** for standard use.

- Your vehicle is **not modified or heavily towed** regularly.

- You re comfortable with **basic mechanical work** and can ensure proper installation.

- You want to **avoid unnecessary expenses** without sacrificing functionality.

- Your Silverado is **modified, turbocharged, or used for heavy towing**.

- You want **longer-lasting performance** and a better warranty.

- You plan to **keep the vehicle for an extended period** and want to minimize future seal replacement risks.

- You re willing to **pay a slightly higher price** for improved durability.

For most **stock or lightly modified** 2001 2009 Silverado 2500 HD owners, the **National 710258 is a reasonable choice**, provided you follow installation best practices. However, if you want the best possible seal for the money, a **Fel-Pro or Goodyear part** is the safer long-term investment.

Details:

Inside Diameter: 4.528. Compatible with wide range of fluids. Crankshaft Seal 710258 by National. The finest quality at a great price.

Designed utilizing the latest technology, this product by National features premium quality and will perform better than advertised. Specifications: Thickness: 0.394. Order from the comfort of your home or office. Material: .

width : 0.394.

part #: 710258 prices

• $39.53-$58.31

specifications cranshafengin:

• for models: 2500, Silverado
• for makes: Chevy
• for years: 2001-2009
• brand: National
• mpn: 710258
• product type: Engine
• upc: 724956377145
• fitment type: Direct Replacement
• partslink number: 23503969, 5743226, 5743226
• compatible make s : Chevrolet, Gmc, Hummer, Am General, Workhorse
• compatible model s : Silverado 2500 Hd, Silverado 2500 Hd Classic, Tahoe
• fitnote: Enginevinname
• product subtype: Crankshafts
• type: Seals Gaskets
• product details: Engine Crankshaft Seal
• engine version: 6.6l Duramax V8
• department: Replacement

seller cranshafengin:

• rating: 99.2%
• city: Saint Paul, Minnesota
• # reviews: 161013

returns cranshafengin:

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

general cranshafengin:

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

payments cranshafengin:

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

offer cranshafengin:

• availability: In Stock
• sold: 0
• quantity: 5
• options: Ship-to-home
• started: June 2, 2026

shipping cranshafengin:

• type: Calculated
• transit: 2-4 Days
• cost: $19.08
• service: FedEx Ground / FedEx Home Delivery
• carrier: FedEx
• class: Standard

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