National 710896 Engine Crankshaft Seal - Rear

Overview of National 710896 Engine Crankshaft Seal

The National 710896 engine crankshaft seal is designed to provide reliable sealing performance for various Ford, Lincoln, Mazda, and Mercury vehicles. Engineered with a fluoro-elastomer material and a clockwise-spiral lip design, this oil seal ensures effective protection against oil leaks and contamination.

• Inside diameter: 3.622 inches (92.000 mm)
• Outside diameter: 4.299 inches (109.200 mm)
• Thickness: 0.374 inches (9.500 mm)
• Overall width with side lip: 0.551 inches (14.000 mm)
• Helix type: Clockwise-spiral lip design for enhanced sealing
• Material: Durable fluoro-elastomer for heat and chemical resistance
• Housing bore: 4.291 inches (109.000 mm)
• Part number: 710896

Detailed Product Description

The National 710896 crankshaft seal is part of the 710800 series, crafted to meet the demanding requirements of engine sealing systems. Its fluoro-elastomer construction offers excellent resistance to heat, oil, and other automotive fluids, making it suitable for heavy-duty applications. The clockwise-spiral lip design helps maintain a tight seal around the crankshaft, reducing the risk of oil leaks and contamination that can lead to engine damage. With precise dimensions including a 3.622-inch inside diameter and a 4.299-inch outside diameter, this seal fits securely within the housing bore of 4.291 inches, ensuring proper installation and long-lasting performance.

Compatible Vehicles and Applications

This engine crankshaft seal is compatible with a range of Ford, Lincoln, Mazda, and Mercury models, including but not limited to:

• Ford F-150, F-250 Super Duty, F-350 Super Duty
• Ford Explorer, Edge, Expedition
• Lincoln Navigator, MKX, MKS, MKT, MKZ
• Mazda CX-9
• Mercury Sable, Mountaineer
• Ford Transit-150, Transit-250, Transit-350, Transit-350 HD

Using the National 710896 seal ensures compatibility and reliable sealing performance for these specific vehicles.

Common Issues Addressed by This Crankshaft Seal

• Prevents oil leaks around the crankshaft area
• Reduces contamination from dirt and debris entering the engine
• Maintains engine oil pressure and efficiency
• Protects against premature wear of engine 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
• Use proper tools to avoid damaging the seal during installation
• Verify the seal orientation matches the clockwise-spiral lip design for optimal sealing
• Check dimensions carefully to confirm fitment with the vehicle’s specifications
• Apply a light coat of engine oil on the seal lip before installation to reduce initial wear

Quality Assurance and Warranty

National manufactures the 710896 crankshaft seal to meet industry standards for durability and performance. The fluoro-elastomer material and precision engineering provide reliable sealing under demanding conditions. While specific warranty details may vary, National products typically come with a limited warranty against defects in material and workmanship, ensuring confidence in your purchase.