National 472082 Engine Crankshaft Seal - Front

Overview of National 472082 Engine Crankshaft Seal

The National 472082 engine crankshaft seal is designed to provide reliable sealing performance for various GM vehicles. Engineered with nitrile material, this oil seal ensures effective protection against oil leaks in applications including Buick, Cadillac, Chevrolet, and GMC models.

• Inside diameter: 2.000 inches (50.8 mm)
• Outside diameter: 2.884 inches (73.25 mm)
• Thickness/width: 0.375 inches (9.53 mm)
• Material: Durable nitrile rubber for oil resistance
• Housing bore size: 2.880 inches (73.15 mm)
• Part type: Engine crankshaft oil seal, Series 470000, Type 47

Technical Details and Specifications

The National 472082 crankshaft seal is constructed from nitrile, a material known for its resistance to oil, heat, and wear, making it suitable for engine sealing applications. With an inside diameter of 2.000 inches and an outside diameter of 2.884 inches, this seal fits shafts and housings precisely to prevent oil leakage. The 0.375-inch thickness provides a robust sealing surface while maintaining flexibility. This seal is part of National's 470000 series, designed specifically for crankshaft sealing needs in a range of GM vehicles.

Compatible Vehicles and Applications

This engine crankshaft seal is compatible with a variety of General Motors vehicles, including Buick models like the Century and LeSabre, Cadillac DeVille and Seville, Chevrolet C10 and Impala, GMC C1500 Suburban, Oldsmobile Cutlass and Delta 88, and Pontiac Bonneville and Firebird. The National 472082 seal is suitable for use in both passenger cars and light trucks, ensuring proper sealing in engines requiring a 2.000-inch shaft diameter.

Common Issues Addressed by the National 472082 Seal

• Prevents oil leaks around the crankshaft area
• Reduces engine contamination from external debris
• Maintains engine oil pressure by sealing critical points
• Minimizes wear on crankshaft bearings by preventing oil loss
• Helps avoid costly engine repairs due to oil leakage

Installation Notes and Tips

When installing the National 472082 crankshaft seal, ensure the shaft and housing bore are clean and free of debris. Use appropriate tools to press the seal evenly into the housing bore without damaging the sealing lip. Lubricate the seal lip lightly with clean engine oil before installation to reduce initial wear. Verify the seal is seated flush and properly aligned to avoid premature failure.

Quality Assurance and Warranty

National engine seals are manufactured to meet OEM specifications, ensuring consistent quality and durability. The 472082 crankshaft seal undergoes rigorous testing for material integrity and dimensional accuracy. While specific warranty details may vary, National typically offers coverage against manufacturing defects to provide confidence in product reliability.