National 710521 Engine Crankshaft Seal - Front

Overview of National 710521 Engine Crankshaft Seal

The National 710521 engine crankshaft seal is designed to provide reliable sealing performance for select Chevrolet and Suzuki vehicles. Engineered with fluoro-elastomer material, this oil seal ensures durability and resistance to heat and chemicals, making it suitable for demanding engine environments.

• Inside diameter: 1.772 inches (45.000 mm)
• Outside diameter: 2.488 inches (63.200 mm)
• Thickness/width: 0.295 inches (7.500 mm)
• Housing bore diameter: 2.480 inches (63.000 mm)
• Material: Fluoro-elastomer for enhanced durability
• Part number: 710521, Series 710500

Detailed Product Description

This National 710521 crankshaft seal is specifically designed to fit Chevrolet and Suzuki models including the Grand Vitara, Sidekick, SX4, SX4 Crossover, Tracker, Vitara, and XL-7. The seal features a 1.772 inch (45 mm) inside diameter to fit the crankshaft precisely, while the 2.488 inch (63.2 mm) outside diameter ensures a secure fit within the engine housing bore of 2.480 inches (63 mm). Constructed from fluoro-elastomer, the seal offers excellent resistance to oil, heat, and engine chemicals, maintaining a tight seal under various operating conditions. The 0.295 inch (7.5 mm) thickness provides the necessary robustness to prevent leaks and maintain engine integrity.

Common Applications and Issues Addressed

• Prevents oil leaks around the crankshaft area
• Maintains engine oil pressure and cleanliness
• Reduces risk of engine contamination from external debris
• Helps avoid premature wear of crankshaft bearings
• Ensures proper sealing in Chevrolet and Suzuki engine models

Installation Notes and Tips

• Ensure the crankshaft and housing bore are clean and free of debris before installation
• Use appropriate tools to avoid damaging the fluoro-elastomer seal during installation
• Verify the seal orientation matches the engine manufacturer’s specifications
• Check for proper seating to prevent leaks and ensure long-term performance

Quality Assurance and Warranty

National engine crankshaft seals, including part number 710521, are manufactured to meet strict quality standards for durability and fitment. The fluoro-elastomer material is selected for its resistance to heat and chemical degradation, contributing to reliable engine performance. While specific warranty details may vary, National products typically come with a limited warranty against manufacturing defects to provide confidence in your purchase.