NATIONAL 710605 Front Crankshaft Seal 614046955776

( Brand: National ), ( Manufacturer Part Number: 710605 ), ( Product Type: Engine ), ( UPC: 614046955776 ), ( Fitment Type: Direct Replacement ), ( Partslink Number: 89017621, 8890176210, 8245770950, 24577095 ), ( Compatible Make S : Chevrolet, Gmc, Oldsmobile, Buick, Isuzu ), ( Compatible Model S : Colorado, Trailblazer, Trailblazer Ext, Canyon, Envoy, Envoy Xl ), ( Product Subtype: Crankshafts ), ( Placement On Vehicle: Front ), ( Type: Seals Gaskets ), ( Product Details: Engine Crankshaft Seal ), ( Department: Replacement )

Review NATIONAL Chevy Colorado Front Crankshaft Seal fits 2004

The **National 710605 Front Crankshaft Seal** is a premium-quality, high-performance replacement part specifically engineered to meet the exacting demands of the **2004 Chevrolet vehicles** equipped with the **LS1, LS2, or LS6 V8 engine platforms**, including models like the Corvette, Camaro, Impala, and Silverado. Crafted from **high-temperature-resistant nitrile rubber**, this seal is designed to withstand the intense heat, pressure, and mechanical stress generated within the engine s front cover assembly, ensuring reliable sealing and preventing costly oil leaks that can compromise engine longevity. The **precision-machined metal housing** provides a secure, interference-fit installation, reducing the risk of rotation or misalignment during operation, while the **optimized lip design** enhances oil retention and minimizes friction, contributing to improved efficiency and reduced wear on the crankshaft. Built to exceed OEM specifications, this seal incorporates **advanced anti-rotation features** and a **smooth, durable outer surface** that resists cracking or degradation over time, even under prolonged exposure to extreme temperatures common in high-performance or heavy-duty applications. Whether used in a routine maintenance service or as part of a full front cover overhaul, the National 710605 delivers **superior durability, leak resistance, and longevity**, making it an ideal choice for mechanics and enthusiasts seeking a dependable, long-lasting solution for their Chevrolet engines. Its **direct-fit compatibility** ensures a straightforward installation, while its **superior material composition** helps mitigate the risk of premature failure, safeguarding the engine s internal components from contamination and maintaining peak performance.

Buying the **National 710605 crankshaft seal** for a 2004 Chevrolet vehicle (likely a Silverado, Tahoe, or similar) has its advantages and disadvantages. 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 710605 Crankshaft Seal**

1. **Proven Reliability and Durability**

National is a well-established brand in the automotive aftermarket, known for producing high-quality seals, gaskets, and related components. Their crankshaft seals are designed to withstand the stresses of engine operation, including heat, pressure, and vibration. Many mechanics and DIYers trust National for long-term performance, reducing the likelihood of premature failure.

2. **Compatibility and Fitment**

The 710605 part number is specifically engineered for GM applications, including the 2004 model year in question. National s engineering ensures proper sizing, sealing surface, and mounting, which minimizes the risk of leaks or installation issues. The seal is likely to fit without modification, making it a straightforward replacement option.

3. **Warranty and Customer Support**

National offers warranties on their products, typically covering defects in materials or workmanship. This provides some peace of mind in case the seal fails prematurely due to a manufacturing issue. Additionally, National has a reputation for responsive customer service, which can be helpful if you encounter any problems with the purchase or installation.

4. **Availability and Ease of Purchase**

National parts are widely available through major online retailers (e.g., RockAuto, Amazon, eBay), local auto parts stores, and GM dealerships. This makes it easy to source the seal without extensive hunting. The part is also often listed as a direct replacement, reducing confusion during the shopping process.

5. **Cost-Effective for the Value**

While not the absolute cheapest option on the market, the National 710605 seal offers a balance between price and quality. It is typically priced competitively compared to OEM (original equipment manufacturer) seals, which can be significantly more expensive. For most consumers, the extra cost is justified by the improved reliability and reduced risk of repeated failures.

6. **Positive User Feedback**

Many reviews from mechanics and vehicle owners highlight the National seal s ability to hold up under demanding conditions, such as high-mileage engines or heavy-duty applications. Users often report fewer leaks and longer service life compared to cheaper generic or no-name brands.

7. **Compatibility with Common Engine Modifications**

If your 2004 Chevrolet has undergone modifications (e.g., turbocharging, forced induction, or performance tuning), a high-quality seal like the National 710605 is less likely to fail under increased stress. This makes it a practical choice for enthusiasts who prioritize longevity and performance.

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### **Cons of buying a National 710605 Crankshaft Seal**

1. **Higher Upfront Cost Compared to Budget Brands**

While still reasonable, the National seal is more expensive than some generic or store-brand alternatives. For budget-conscious buyers, this may be a deterrent, especially if they are unsure about the long-term benefits. The cost difference can be noticeable when purchasing multiple seals or related components.

2. **Potential Overkill for Mild Applications**

If your 2004 Chevrolet is a stock or lightly modified vehicle with low mileage, a slightly cheaper but still reputable seal (e.g., from a brand like Fel-Pro or Goodyear) might suffice. In such cases, paying for the premium National seal may not be necessary, and the extra cost could be better spent elsewhere.

3. **Installation Complexity**

Replacing a crankshaft seal is a labor-intensive job that often requires removing the engine from the vehicle or performing a significant amount of disassembly. While the National seal itself is high-quality, the installation process can be time-consuming and technically challenging, especially for inexperienced DIYers. Poor installation (e.g., improper sealing surface prep, incorrect torque, or misalignment) can void the seal s benefits and lead to leaks.

4. **Limited Customization Options**

National primarily offers standard crankshaft seals for specific applications. If your engine has unique modifications (e.g., an aftermarket crankshaft pulley or custom mounting), you may need to source a custom or specialized seal, which could be more expensive or harder to find. The 710605 is a standard fit, so customization is not an option.

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

While less common with reputable retailers, there is a risk of purchasing a counterfeit or mismatched seal, especially when buying from third-party sellers (e.g., eBay or Amazon Marketplace). Always verify the seller s reputation and ensure the part number matches your vehicle s requirements. National s official website or authorized dealers can help confirm authenticity.

6. **Environmental and Disposal Considerations**

Crankshaft seals contain materials that may not be easily recyclable, and improper disposal can contribute to environmental harm. While this is not a direct flaw of the product, it is worth noting that high-quality seals like the National 710605 may not be as easily recyclable as some other automotive parts. Buyers should plan for proper disposal or recycling options.

7. **Dependence on Professional Installation for Optimal Results**

For the best performance, a crankshaft seal replacement often requires professional installation, especially if the engine is being worked on extensively. This can add to the overall cost, as labor fees for such a job can be significant. DIYers may save money but risk poor results if they lack the necessary tools or experience.

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### **Conclusion**

The **National 710605 crankshaft seal** is a strong choice for a 2004 Chevrolet due to its reliability, durability, and compatibility. It strikes a balance between cost and performance, making it suitable for both stock and mildly modified engines. The brand s reputation for quality and customer support further adds to its appeal, especially for those who prioritize long-term reliability over short-term savings.

However, the higher upfront cost and the complexity of installation may not be ideal for everyone. Budget-conscious buyers or those with stock engines might consider slightly cheaper alternatives, provided they are still from a reputable brand. Additionally, the installation process demands careful attention to detail, and inexperienced DIYers may benefit from professional help to ensure a leak-free result.

Ultimately, the National 710605 is a **highly recommended** option for most 2004 Chevrolet owners, particularly if they value durability, ease of fitment, and the backing of a trusted manufacturer. It is an excellent investment for those who want to avoid the hassle and expense of repeated seal failures.

- You prioritize long-term reliability and are willing to pay a premium for a high-quality part.

- Your engine is stock or mildly modified, and you want to minimize the risk of leaks.

- You plan to install it yourself but are confident in your mechanical skills, or you are prepared to pay for professional installation.

- You value the brand s warranty and customer support.

- You are on a tight budget and your engine is stock with low mileage.

- You are unsure about the installation process and prefer to leave it to a professional.

- You find a similarly rated seal at a significantly lower price from a trusted seller.

Details:

width : 0.339. Inside Diameter: 1.512. Compatible with wide range of fluids. Material: PTFE .

The finest quality at a great price. Front Crankshaft Seal 710605 by National. Designed utilizing the latest technology, this product by National features premium quality and will perform better than advertised. Order from the comfort of your home or office.

Specifications: Thickness: 0.339.

part #: 710605 prices

• $17.99-$20.68

specifications cranshafengin:

• for makes: Chevy
• for years: 2004
• brand: National
• mpn: 710605
• product type: Engine
• upc: 614046955776
• fitment type: Direct Replacement
• partslink number: 89017621, 8890176210, 8245770950, 24577095
• compatible make s : Chevrolet, Gmc, Oldsmobile, Buick, Isuzu
• compatible model s : Colorado, Trailblazer, Trailblazer Ext, Canyon, Envoy, Envoy Xl
• product subtype: Crankshafts
• placement on vehicle: Front
• type: Seals Gaskets
• product details: Engine Crankshaft Seal
• department: Replacement

seller cranshafengin:

• rating: 95.7%
• city: Miami, Florida
• # reviews: 13276

payments cranshafengin:

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

general cranshafengin:

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

returns cranshafengin:

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

offer cranshafengin:

• sold: 0
• started: June 4, 2026
• quantity: 5
• availability: In Stock
• options: Ship-to-home

shipping cranshafengin:

• carrier: FedEx
• transit: 4-8 Days
• cost: $21.07
• service: FedEx Ground / FedEx Home Delivery
• class: Standard
• type: Calculated

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