National 710355 Engine Crankshaft Seal - Front

Overview of National Engine Crankshaft Seal 710355

The National 710355 engine crankshaft seal is designed to provide reliable sealing performance for various Ford, Kia, Mazda, and Mercury vehicles. Engineered with precision, this oil seal helps maintain engine integrity by preventing oil leaks around the crankshaft.

• Inside diameter: 37.00 mm (1.457 inches)
• Outside diameter: 50.70 mm (1.996 inches)
• Thickness: 7.00 mm (0.276 inches)
• Material: Durable polyacrylate compound
• Helix type: Clockwise-spiral lip design for effective sealing
• Compatible housing bore: 50.50 mm (1.988 inches)
• Part number: 710355

Technical Details and Specifications

This National crankshaft seal (part number 710355) features a polyacrylate material construction, which offers resistance to heat and oil degradation. The seal’s clockwise-spiral lip design enhances its ability to maintain a tight seal around the crankshaft, reducing the risk of oil leaks. With an inside diameter of 37 mm and an outside diameter of 50.7 mm, it fits precisely into the housing bore of 50.5 mm, ensuring proper installation and function. The 7 mm thickness provides durability and stability under engine operating conditions.

Compatible Vehicles and Applications

This engine crankshaft seal is compatible with a range of vehicles, including Ford Escort, Capri, and Tracer models; Kia Sephia and Aspire; Mazda 323, Miata, MX-3, and Protege; as well as Mercury Festiva. It is specifically designed to meet the sealing requirements of these models, making it a suitable replacement part for maintenance or repair.

Common Issues Addressed by the National 710355 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
• Helps avoid costly engine damage due to oil loss

Installation Notes and Tips

When installing the National 710355 crankshaft seal, ensure the housing bore is clean and free of debris. Use appropriate tools to press the seal evenly into place without damaging the lip or seal surface. Verify the seal’s 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 seal.

Quality Assurance and Warranty

National engine seals are manufactured to meet industry standards for durability and performance. The 710355 part undergoes rigorous quality control to ensure consistent dimensions and material integrity. While specific warranty details may vary, National typically offers coverage against manufacturing defects to provide confidence in the product’s reliability.