National 710850 Engine Crankshaft Seal - Front

Overview of National 710850 Engine Crankshaft Seal

The National 710850 engine crankshaft seal is designed specifically for Mini Cooper, Cooper Countryman, and Cooper Paceman models. Engineered with precision, this oil seal ensures reliable sealing performance to protect your engine’s crankshaft from oil leaks and contaminants.

• Inside diameter: 2.402 inches (61.000 mm)
• Outside diameter: 2.961 inches (75.200 mm)
• Thickness/width: 0.315 inches (8.000 mm)
• Material: Durable PTFE for enhanced wear resistance
• Helix type: Clockwise-spiral lip design for effective sealing
• Housing bore size: 2.953 inches (75.000 mm)
• Part number: 710850, part of the 710800 series

Technical Details and Material Specifications

This National crankshaft seal features a PTFE (polytetrafluoroethylene) construction, known for its chemical resistance and low friction properties, which helps extend the service life of the seal. The clockwise-spiral lip design improves sealing efficiency by directing oil back into the engine, reducing leakage. With an inside diameter of 2.402 inches and an outside diameter of 2.961 inches, this seal fits precisely within the housing bore of 2.953 inches, ensuring a secure and tight fit on the crankshaft.

Compatible Vehicles and Applications

Compatible with Mini vehicles, this crankshaft seal is suitable for the Cooper, Cooper Countryman, and Cooper Paceman models. The part number 710850 is specifically designed to meet the OEM specifications for these models, providing a reliable replacement option for maintaining engine integrity and performance.

• Prevents oil leaks around the crankshaft
• Protects engine components from dirt and debris
• Maintains proper oil pressure within the engine
• Reduces wear on the crankshaft and surrounding parts
• Helps avoid costly engine repairs due to seal failure

Installation Notes and Tips

When installing the National 710850 crankshaft seal, ensure the housing bore and crankshaft surfaces are clean and free of debris. Use appropriate tools to press the seal evenly into place without damaging the sealing lip. Verify the seal orientation matches the clockwise-spiral lip design to optimize sealing performance. Proper installation will help prevent premature seal failure and maintain engine reliability.

Quality Assurance and Warranty

National manufactures this crankshaft seal to meet strict quality standards, ensuring durability and consistent performance. The PTFE material and precision design contribute to long service life under normal operating conditions. While specific warranty details are not provided, National products typically adhere to industry standards for automotive replacement parts.