National 710618 Engine Crankshaft Seal - Front

Overview of National 710618 Engine Crankshaft Seal

The National 710618 engine crankshaft seal is designed for reliable sealing performance in select Audi, Porsche, and Volkswagen models. Engineered with precision, this oil seal helps maintain engine integrity by preventing oil leaks around the crankshaft.

• Inside diameter: 1.378 inches (35.000 mm)
• Outside diameter: 1.895 inches (48.130 mm)
• Thickness/width: 0.394 inches (10.000 mm)
• Material: PTFE for enhanced durability and chemical resistance
• Helix type: Clockwise-spiral lip design for effective sealing
• Compatible with housing bore size: 1.890 inches (48.000 mm)

Technical Details and Specifications

The National 710618 crankshaft seal belongs to the 710600 series and features a 32-type design optimized for engine sealing applications. Its PTFE construction offers resistance to heat, oil, and wear, making it suitable for demanding engine environments. The seal’s clockwise-spiral lip design ensures a tight fit around the crankshaft, reducing the risk of oil leakage and contamination. With precise dimensions—1.378 inch inside diameter and 1.895 inch outside diameter—this seal fits housing bores measuring approximately 1.890 inches, ensuring compatibility with specific engine configurations.

Compatible Vehicles and Applications

This engine crankshaft seal is compatible with a range of Audi, Porsche, and Volkswagen vehicles, including but not limited to:

• Audi A3, A4, A4 Quattro, A5, A5 Quattro, A6, A6 Quattro, Allroad Quattro, S4, TT, TT Quattro
• Porsche Cayenne, Panamera
• Volkswagen Beetle, Cabrio, CC, Eos, EuroVan, Golf, Golf City, Golf SportWagen, Jetta, Jetta City, Passat, Passat CC, R32, Touareg, Q7

Common Issues Addressed by the 710618 Crankshaft Seal

• Prevents oil leaks around the crankshaft area
• Reduces engine contamination from external debris
• Maintains proper oil pressure within the engine
• Minimizes wear on crankshaft bearings by retaining lubrication
• Helps avoid costly engine repairs due to seal failure

Installation Notes and Tips

When installing the National 710618 crankshaft seal, ensure the housing bore and shaft are clean and free of debris. Use appropriate tools to press the seal evenly into place without damaging the PTFE lip. Verify the seal orientation matches the clockwise-spiral lip design for optimal sealing. It is recommended to inspect the crankshaft surface for wear or damage before installation to ensure a proper fit and long service life.

Quality Assurance and Warranty

National manufactures the 710618 crankshaft seal to meet industry standards for durability and performance. The PTFE material and precision engineering contribute to consistent sealing under normal operating conditions. While specific warranty details may vary, National typically offers coverage against manufacturing defects to provide confidence in product reliability.