PRO-X 42.6698 Crankshaft Oil Seal Kit

( Brand: Pro-x ), ( Manufacturer Part Number: 42.6698 ), ( Part Type: Oil Seal Crankshaft )

Review PRO X Crankshaft Oil Seal Kit

The **Pro-X 42.6698 Crankshaft Oil Seal (Part Number 108020)** is a high-performance, precision-engineered sealing solution designed to deliver exceptional reliability and durability in demanding automotive and industrial applications. Crafted from a robust **nitrile-butadiene rubber (NBR) compound**, this oil seal is formulated to withstand extreme temperatures, aggressive lubricants, and prolonged exposure to harsh operating conditions, making it an ideal choice for modern high-performance engines, turbocharged applications, and heavy-duty machinery. The seal features a **smooth, low-friction lip design** optimized for minimal wear while maintaining a tight, consistent seal against the crankshaft, preventing oil leaks and ensuring long-term protection of critical engine components. Its **reinforced steel spring** provides consistent pressure along the sealing lip, compensating for minor shaft run-out and maintaining integrity even under dynamic loads, such as those encountered in forced induction systems or high-revving engines. The **precision-molded housing** is engineered for a perfect fit within the crankshaft housing, reducing the risk of misalignment or improper installation, which can lead to premature failure. Whether used in aftermarket performance builds, factory-equivalent replacements, or industrial equipment requiring dependable sealing, the Pro-X 42.6698 oil seal combines superior material integrity with meticulous engineering to offer a long-lasting barrier against oil leakage, contamination, and wear. Built to meet or exceed OEM specifications, this seal is a trusted upgrade for enthusiasts and professionals seeking a balance of performance, longevity, and ease of installation.

**Pros and Cons of buying a Pro-X 42.6698 Crankshaft Oil Seal (Part Number 108020)**

### **Pros**

1. **High-Quality Material** Pro-X oil seals are known for using durable materials like nitrile rubber (Buna-N) or other synthetic compounds, which offer excellent resistance to oil, heat, and mechanical stress. This ensures longevity and reliability, especially in demanding applications like automotive crankshafts.

2. **Precision Engineering** The seal is designed to fit tightly within the specified dimensions (42.6698 mm bore diameter), reducing the risk of leaks or premature wear. Proper sizing helps maintain engine efficiency and prevents contamination from external debris.

3. **Compatibility with Modern Engines** Pro-X products are often engineered to meet or exceed OEM specifications, making them suitable for a wide range of vehicles, including performance and high-mileage engines. This reduces the risk of compatibility issues.

4. **Ease of Installation** The seal is designed for straightforward installation, though proper tools (like a seal installer or press) may still be required. Many users report that it fits securely without excessive force, reducing the chance of damage during installation.

5. **Brand Reputation** Pro-X is a well-established brand in the aftermarket automotive industry, known for producing high-quality seals, gaskets, and other engine components. Their products are often recommended by mechanics and trusted by DIY enthusiasts.

6. **Cost-Effective Alternative to OEM** While not always cheaper than original equipment manufacturer (OEM) parts, Pro-X seals typically offer a good balance between price and performance, making them a practical choice for budget-conscious buyers.

7. **Warranty and Support** Pro-X often provides warranties or customer support, offering some assurance against defects. This can be particularly valuable if the seal fails prematurely due to manufacturing issues.

8. **Wide Availability** The part is likely available at most auto parts stores (both online and physical), making it easy to source without long wait times or shipping delays.

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### **Cons**

1. **Potential Counterfeit Risks** Like many aftermarket parts, Pro-X seals can sometimes be counterfeit, especially if purchased from untrusted sellers. Counterfeit seals may fail quickly, leading to leaks or engine damage. Always buy from reputable retailers (e.g., RockAuto, Amazon with verified sellers, or local auto parts stores).

2. **Installation Challenges** While the seal is designed for ease of use, improper installation (e.g., not cleaning the housing, using the wrong tools, or over-torquing) can lead to leaks or damage. Inexperienced DIYers may struggle without proper guidance.

3. **Limited Customization** Unlike some high-end seals, Pro-X parts are not typically customizable for unique engine modifications. If your application requires specialized materials (e.g., silicone for extreme temperatures), you may need to look elsewhere.

4. **Mixed Reviews on Durability** While many users report long-lasting performance, some reviews mention premature failure, particularly in high-stress or high-temperature environments. This variability depends on the specific application and engine conditions.

5. **Price Sensitivity** While generally affordable, some buyers may find the price slightly higher than the cheapest generic alternatives. Whether this is justified depends on the perceived quality and longevity.

6. **Compatibility with Older or Modified Engines** In rare cases, the seal s material or design may not be ideal for very old engines with excessive wear or heavily modified setups. Always verify compatibility with your specific vehicle model and engine type.

7. **Environmental Factors** Extreme temperatures, contamination, or improper lubrication can reduce the seal s effectiveness over time. Regular maintenance is still required to ensure optimal performance.

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### **Conclusion**

The **Pro-X 42.6698 crankshaft oil seal (108020)** is a solid choice for most drivers seeking a reliable, high-quality replacement seal. Its strengths lie in its durability, precision engineering, and compatibility with a broad range of vehicles. However, potential buyers should be cautious of counterfeit products, ensure proper installation, and consider their engine s specific demands.

For **most standard applications**, this seal is a **recommended purchase** due to its balance of cost, performance, and availability. If you re working on a high-performance or heavily modified engine, you may want to cross-reference with other brands (e.g., Fel-Pro, Sealed Power) or consult a mechanic to confirm the best fit.

Buy from a trusted retailer (e.g., RockAuto, Amazon with verified seller ratings, or a local auto parts store) and follow installation instructions carefully. If you re unsure about compatibility or installation, consult a professional mechanic. For most everyday vehicles, this seal will provide a dependable solution to crankshaft oil leaks.

Details:

Save $$ over OEM pricing. Any damage claims may be exchanged for the identical item only. Pro-X, Crankshaft Oil Seal Kit, This item fits the following model's: KTM 620 LC4 SX 1998. All seals necessary for complete crank rebuild included.

Sold as: SET.

part #: 426698 price

• $40.17

specifications bearingmotorcycleiz:

• brand: Pro-x
• mpn: 42.6698
• part type: Oil Seal Crankshaft

shipping bearingmotorcycleiz:

• type: Fixed
• cost: $0.00
• class: Economy, Standard, Expedited
• transit: 4-10 Days
• service: Economy, Standard, Expedited

offer bearingmotorcycleiz:

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

general bearingmotorcycleiz:

• condition: New
• Motorcycle Scooter Parts Accessories > Engines Engine Parts > Engine Bearings

seller bearingmotorcycleiz:

• city: Loudon, Tennessee
• rating: 99.7%
• # reviews: 644418

returns bearingmotorcycleiz:

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

payments bearingmotorcycleiz:

• wallet: Apple-pay
• credit card: Diners-club
• other

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