National 710799 Engine Crankshaft Seal - Front

Overview of National 710799 Engine Crankshaft Seal

The National 710799 engine crankshaft seal is designed to provide reliable sealing performance for select Buick, Chevrolet, Pontiac, and Saturn vehicles. Engineered with a fluoro-elastomer sealing material and a clockwise-spiral lip design, this oil seal helps maintain engine integrity by preventing oil leaks around the crankshaft.

• Inside diameter: 1.240 inches (31.5 mm)
• Outside diameter: 1.661 inches (42.2 mm)
• Thickness/width: 0.276 inches (7.0 mm)
• Helix type: Clockwise-spiral lip design for effective sealing
• Material: Durable fluoro-elastomer for heat and chemical resistance
• Housing bore diameter: 1.654 inches (42.0 mm)

Technical Details and Specifications

The National 710799 crankshaft seal belongs to the 710700 series and is constructed from fluoro-elastomer, a material known for its resistance to high temperatures and automotive fluids. The seal features a precise inside diameter of 1.240 inches (31.5 mm) to fit the crankshaft shaft diameter, while the outside diameter measures 1.661 inches (42.2 mm) to fit securely within the housing bore of 1.654 inches (42.0 mm). The 0.276 inch (7.0 mm) thickness ensures a tight seal without compromising flexibility. The clockwise-spiral lip design enhances sealing efficiency by directing oil back into the engine, reducing leakage and contamination risks.

Compatible Vehicles and Applications

This engine crankshaft seal is compatible with various models from Buick, Chevrolet, Pontiac, and Saturn, including the Astra, Aveo, Aveo5, Cascada, Cruze, Cruze Limited, G3, G3 Wave, Malibu, Sonic, Wave, and Wave5. The part number 710799 is specifically designed to meet the OEM specifications for these vehicles, ensuring proper fit and function.

Common Issues Addressed by the National 710799 Seal

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

Installation Notes and Tips

When installing the National 710799 crankshaft seal, ensure the sealing surface and housing bore are clean and free of debris. Use appropriate tools to press the seal evenly into the housing bore without damaging the lip or seal body. Verify the seal orientation matches the clockwise-spiral lip design to optimize sealing performance. It is recommended to inspect the crankshaft surface for wear or damage before installation to prevent premature seal failure.

Quality Assurance and Warranty

National engine crankshaft seals are manufactured to meet strict quality standards, using durable fluoro-elastomer materials for long-lasting performance. The 710799 seal is part of the 710700 series, known for consistent reliability in automotive sealing applications. While specific warranty details may vary, National typically offers coverage against manufacturing defects to ensure customer confidence in their products.