National 710310 Engine Crankshaft Seal - Front

Overview of National 710310 Engine Crankshaft Seal

The National 710310 engine crankshaft seal is designed to provide reliable sealing performance for various automotive applications. Engineered with precision, this oil seal is compatible with multiple vehicle makes and models, including BMW 325iX and Suzuki Swift, ensuring effective protection against oil leaks.

• Inside diameter: 1.260 inches (32.000 mm)
• Outside diameter: 1.858 inches (47.200 mm)
• Thickness: 0.236 inches (6.000 mm)
• Sealing material: Polyacrylate for enhanced durability
• Clockwise-spiral lip design for improved sealing efficiency
• Housing bore size: 1.850 inches (47.000 mm)
• Compatible with BMW, Chevrolet, Geo, GMC, Pontiac, and Suzuki models

Detailed Product Description and Specifications

The National 710310 crankshaft seal is constructed from polyacrylate, a material known for its resistance to heat, oil, and wear. Its clockwise-spiral lip design helps maintain a tight seal around the crankshaft, reducing the risk of oil leakage and contamination. With an inside diameter of 1.260 inches and an outside diameter of 1.858 inches, this seal fits precisely within a housing bore of 1.850 inches, making it suitable for a range of engine configurations. The 0.236-inch thickness ensures a robust barrier against fluid escape while accommodating shaft movement.

Compatible Vehicles and Applications

This engine crankshaft seal is compatible with several vehicle makes and models, including but not limited to:

• BMW 325iX
• Chevrolet Metro and Sprint
• Geo Firefly and Tracker
• GMC Sunrunner
• Pontiac Forsa
• Suzuki Esteem, Samurai, Sidekick, Swift, Vitara, and X-90

Common Issues Addressed by the National 710310 Seal

• Prevents oil leaks around the crankshaft
• Reduces engine contamination from external debris
• Maintains engine oil pressure by sealing critical areas
• Minimizes wear on the crankshaft and housing bore
• Helps avoid costly engine repairs due to seal failure

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 polyacrylate seal lip
• Verify the seal orientation matches the clockwise-spiral lip design for optimal performance
• Check shaft and bore dimensions to confirm compatibility with the 1.260-inch shaft and 1.850-inch housing bore
• Apply a light coat of engine oil to the seal lip before installation to facilitate smooth fitting

Quality Assurance and Warranty

National engine crankshaft seals, including part number 710310, are manufactured to meet industry standards for durability and performance. The polyacrylate material and precision design contribute to long service life under normal operating conditions. While specific warranty details may vary, National typically offers coverage against manufacturing defects to ensure customer confidence in their products.