National 710520 Engine Crankshaft Seal - Rear

Overview of National 710520 Engine Crankshaft Seal

The National 710520 engine crankshaft seal is designed to provide reliable sealing performance for various Chevrolet and Suzuki models. Engineered with a bi-directional lip design and fluoro-elastomer material, this oil seal ensures effective protection against oil leaks and contamination.

• Inside diameter: 3.858 inches (98.000 mm)
• Outside diameter: 4.578 inches (116.280 mm)
• Thickness/width: 0.394 inches (10.000 mm)
• Bi-directional helix lip design for enhanced sealing
• Constructed from durable fluoro-elastomer material
• Compatible with Chevrolet and Suzuki vehicles including Esteem, Grand Vitara, Sidekick, SX4, SX4 Crossover, Tracker, Vitara, and XL-7

Detailed Product Description

The National 710520 crankshaft seal is part of the 710500 series, engineered to maintain engine integrity by preventing oil leakage around the crankshaft. Its fluoro-elastomer construction offers resistance to heat, oil, and chemicals, making it suitable for demanding engine environments. The seal features a bi-directional helix lip design that provides effective sealing in both rotational directions, reducing the risk of oil seepage and contamination ingress. With precise dimensions including a 3.858-inch inside diameter and a 4.578-inch outside diameter, this seal fits housing bores measuring approximately 4.567 inches (116.000 mm), ensuring a secure and accurate fit.

Applications and Problem Solving

• Prevents oil leaks from the crankshaft area in Chevrolet and Suzuki engines
• Reduces contamination entry that can cause premature engine wear
• Maintains engine oil pressure by sealing critical rotating components
• Addresses common issues such as oil seepage and crankshaft seal failure
• Helps avoid costly engine repairs related to oil leakage

Installation Notes and Tips

• Ensure the crankshaft and housing bore are clean and free of debris before installation
• Use proper tools to avoid damaging the seal during installation
• Verify the seal orientation matches the bi-directional lip design for optimal performance
• Check for correct fitment with the specified inside and outside diameters
• Lubricate the seal lip lightly with clean engine oil prior to installation

Quality Assurance and Warranty

National's 710520 crankshaft seal is manufactured to meet industry standards for durability and performance. The fluoro-elastomer material and precision engineering 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 product reliability.