National 710600 Engine Crankshaft Seal - Rear

Overview of National 710600 Engine Crankshaft Seal

The National 710600 engine crankshaft seal is designed to provide reliable sealing performance for various Ford, Land Rover, Lincoln, Mazda, and Mercury vehicles. Engineered with precision, this oil seal helps maintain engine integrity by preventing oil leaks around the crankshaft.

• Inside diameter: 3.740 inches (95.000 mm)
• Outside diameter: 4.669 inches (118.600 mm)
• Thickness: 0.335 inches (8.500 mm)
• Material: PTFE for enhanced durability and chemical resistance
• Counter-clockwise spiral lip design for effective sealing
• Compatible with housing bore size of 4.213 inches (107.000 mm)
• Width: 0.532 inches (13.500 mm)

Detailed Product Description

The National 710600 crankshaft seal is constructed from PTFE material, known for its resistance to heat, chemicals, and wear, ensuring long-lasting performance in demanding engine environments. Its counter-clockwise spiral lip design improves sealing efficiency by maintaining consistent contact with the crankshaft, reducing the risk of oil leakage. The seal’s dimensions, including an inside diameter of 3.740 inches and an outside diameter of 4.669 inches, are engineered to fit precisely within the housing bore of 4.213 inches, providing a secure and reliable fit.

This oil seal is part of National’s 710600 series, which focuses on high-quality sealing solutions for engine applications. The design and material selection reflect the requirements of modern engines, supporting optimal engine operation and longevity.

Compatible Vehicles and Applications

This engine crankshaft seal is compatible with a range of vehicles, including Ford models such as the Mustang, Explorer, Edge, Escape, Fusion, Focus, Taurus, and Transit Connect. It also fits Land Rover models like the Discovery Sport and Range Rover Evoque, Lincoln MKC, MKZ, and Nautilus, Mazda CX-5, CX-7, CX-9, MX-5 Miata, and B2300, as well as Mercury Mariner and Milan. The seal is suitable for use in both gasoline and hybrid engine configurations where the specified dimensions match.

Common Issues Addressed by the National 710600 Seal

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

Installation Notes and Tips

Ensure the crankshaft and housing bore are clean and free of debris before installation. Verify the housing bore diameter matches the seal’s outside diameter of 4.669 inches (118.600 mm) for proper fitment. Use appropriate tools to press the seal evenly into place without damaging the PTFE lip. Avoid rotating the seal during installation to maintain the integrity of the counter-clockwise spiral lip design. Lubricate the seal lip lightly with clean engine oil to facilitate smooth installation and initial operation.

Quality Assurance and Warranty

National engine seals are manufactured to meet strict quality standards, ensuring consistent performance and durability. The 710600 crankshaft seal undergoes rigorous testing for dimensional accuracy and material integrity. While specific warranty details may vary, National typically offers coverage against manufacturing defects to provide confidence in product reliability.