National 712146 Wheel Seal - Rear

Overview of National 712146 Wheel Seal

The National 712146 wheel seal is engineered for reliable driveline sealing in select Buick, Chevrolet, Oldsmobile, and Pontiac models. Designed with a bi-directional lip and nitrile material, this oil seal ensures effective protection against contaminants and fluid leaks.

• Inside diameter: 1.687 inches (42.850 mm)
• Outside diameter: 2.579 inches (65.510 mm)
• Width: 0.470 inches (11.940 mm)
• Bi-directional lip design for enhanced sealing
• Constructed from durable nitrile material
• Compatible housing bore: 2.560 inches (65.020 mm)
• Part of the National 712000 series

Technical Details and Specifications

The National 712146 wheel seal features a 25-type design optimized for driveline and axle applications. Its bi-directional lip design provides sealing efficiency in both rotational directions, reducing the risk of oil leakage and contamination ingress. The nitrile rubber compound offers resistance to heat, oil, and wear, making it suitable for the demanding conditions found in automotive wheel hubs. With an inside diameter of 1.687 inches and an outside diameter of 2.579 inches, this seal fits shafts and housings precisely, ensuring a secure fit and long service life.

Compatible Vehicles and Applications

This wheel seal is compatible with a range of classic and late-model vehicles, including Buick models like the Century, LeSabre, and Riviera; Chevrolet models such as the Caprice, Impala, and Monte Carlo; Oldsmobile vehicles including the Cutlass Supreme and Delta 88; and Pontiac models like the Grand Am and LeMans. The National 712146 is designed to meet the sealing requirements of these vehicles’ driveline and axle assemblies.

Common Issues Addressed by the National 712146 Wheel Seal

• Prevents oil leaks from wheel hubs and axle assemblies
• Protects bearings and internal components from dirt and moisture
• Reduces premature wear caused by contamination
• Maintains proper lubrication within the driveline system
• Helps avoid costly repairs related to seal failure

Installation Notes and Tips

Ensure the shaft and housing bore are clean and free of debris before installation. Verify the correct orientation of the bi-directional lip to maintain sealing effectiveness. Use appropriate tools to press the seal evenly into the housing bore without distortion. Avoid damaging the sealing lip during installation to preserve its integrity and performance.

Quality Assurance and Warranty

Manufactured by National, a recognized brand in automotive sealing solutions, the 712146 wheel seal adheres to strict quality standards. The nitrile material and precision dimensions contribute to consistent performance and durability. While specific warranty details may vary, National products typically come with a limited warranty against manufacturing defects, ensuring confidence in the product’s reliability.