National 710056 Engine Crankshaft Seal - Rear

National 710056 Engine Crankshaft Seal Overview

The National 710056 engine crankshaft seal is designed to provide reliable sealing performance for a variety of vehicles including Chrysler, Dodge, Hyundai, Jeep, Kia, Mitsubishi, and Plymouth models. Engineered with a fluoro-elastomer material and a counter-clockwise-spiral lip design, this oil seal ensures effective protection against oil leaks and contamination.

• Inside diameter: 3.583 inches (91.0 mm)
• Outside diameter: 4.378 inches (111.2 mm)
• Thickness/width: 0.394 inches (10.0 mm)
• Material: Durable fluoro-elastomer for heat and chemical resistance
• Helix type: Counter-clockwise spiral lip design for enhanced sealing
• Redicoat finish for improved wear resistance
• Compatible with multiple vehicle makes and models

Technical Details and Specifications

The National 710056 crankshaft seal features a 3.583-inch inside diameter and a 4.378-inch outside diameter, making it suitable for shafts measuring 91 mm and housings with a bore diameter of approximately 111 mm. The 10 mm thickness provides a robust sealing surface, while the fluoro-elastomer material offers excellent resistance to engine oils, heat, and other automotive fluids. The counter-clockwise spiral lip design helps maintain a tight seal under varying engine conditions, reducing the risk of oil leaks and contamination.

Compatible Vehicles and Applications

This engine crankshaft seal is compatible with a wide range of vehicles, including Chrysler 300M, Dodge Caravan, Charger, Dakota, and Ram 50, Hyundai Sonata, Santa Fe, and Tucson, Jeep Liberty and Wrangler, Kia Optima and Sorento, Mitsubishi Eclipse and Montero, as well as Plymouth Acclaim and Sundance models. The part number 710056 ensures precise fitment for these applications, supporting reliable engine performance.

Common Issues Addressed by the National 710056 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

When installing the National 710056 crankshaft seal, ensure the housing bore and shaft surfaces are clean and free of debris. Use appropriate tools to press the seal evenly into place without damaging the lip or material. Verify the seal orientation matches the counter-clockwise spiral lip design for optimal sealing performance. Lubricate the seal lip lightly with clean engine oil before installation to reduce initial wear.

Quality Assurance and Warranty

National manufactures the 710056 crankshaft seal to meet strict industry standards for durability and performance. The fluoro-elastomer material and Redicoat finish contribute to long service life under demanding engine conditions. While specific warranty details may vary, National products typically come with a limited warranty against defects in material and workmanship, providing confidence in the product's reliability.