National 710471 Engine Crankshaft Seal - Rear

Overview of National 710471 Engine Crankshaft Seal

The National 710471 engine crankshaft seal is designed to provide reliable sealing performance for various Chrysler, Dodge, Jeep, Mitsubishi, and Ram vehicles. Engineered with precision, this oil seal helps maintain engine integrity by preventing oil leaks around the crankshaft.

• Inside diameter: 100 mm (3.937 inches)
• Outside diameter: 120.32 mm (4.737 inches)
• Thickness/width: 9.5 mm (0.374 inches)
• Material: durable polyacrylate compound
• Helix type: counter-clockwise spiral lip design for effective sealing
• Compatible housing bore: 120 mm (4.724 inches)
• Part number: 710471, series 710400

Technical Details and Material Specifications

This National crankshaft seal features a polyacrylate material known for its resistance to heat, oil, and wear, ensuring long-lasting performance in demanding engine environments. The counter-clockwise spiral lip design enhances sealing efficiency by directing oil back into the engine, reducing leakage risks. With an inside diameter of 100 mm and an outside diameter of 120.32 mm, this seal fits precisely within the housing bore of 120 mm, providing a secure fit on shafts measuring 3.937 inches in diameter.

Compatible Vehicles and Applications

The National 710471 crankshaft seal is compatible with a range of vehicles including Chrysler 1500, Dodge Dakota, Durango, Ram 1500, Jeep Grand Cherokee, Liberty, Nitro, and Mitsubishi Raider models. This seal is specifically designed for engine applications requiring a 32-type oil seal with the specified dimensions, making it suitable for maintenance and repair tasks on these vehicles.

Common Issues Addressed by This 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 and housing components
• Helps avoid costly engine damage due to oil loss

Installation Notes and Tips

Ensure the crankshaft and housing bore are clean and free of debris before installation. Verify the seal orientation matches the counter-clockwise spiral lip design to optimize sealing performance. Use appropriate tools to press the seal evenly into the housing bore without damaging the lip or seal body. Check shaft dimensions to confirm compatibility with the 3.937-inch diameter specification.

Quality Assurance and Warranty

National engine crankshaft seals are manufactured to meet industry standards for durability and performance. The 710471 seal is part of the 710400 series, known for consistent quality in sealing systems. While specific warranty details may vary, National typically offers coverage against manufacturing defects to ensure customer confidence in their products.