National 3553 Steering Knuckle Seal - Front

National 3553 Steering Knuckle Seal Overview

The National 3553 steering knuckle seal is engineered to provide reliable sealing performance for select Buick, Cadillac, Chevrolet, GMC, Isuzu, and Oldsmobile models. Designed with durable nitrile material and precise dimensions, this oil seal helps maintain proper lubrication and prevent contamination in the steering system.

• Inside diameter: 2.201 inches (55.910 mm)
• Outside diameter: 2.741 inches (69.620 mm)
• Flanged outside diameter: 2.913 inches (73.990 mm)
• Thickness: 0.197 inches (5.000 mm)
• Overall width with side lip: 0.381 inches (9.677 mm)
• Sealing material: Nitrile for resistance to oil and wear
• Redicoat surface treatment for enhanced durability
• Series 3000, Type 284 oil seal

Detailed Product Description

The National 3553 steering knuckle seal is constructed from nitrile, a material known for its excellent resistance to oil, heat, and abrasion. This seal features a flanged outside diameter of 2.913 inches (73.990 mm) and an inside diameter of 2.201 inches (55.910 mm), ensuring a precise fit within the housing bore of 2.735 inches (69.470 mm). The overall width with side lip measures 0.381 inches (9.677 mm), providing effective sealing against contaminants and fluid leaks. The Redicoat treatment enhances the seal’s surface, improving wear resistance and extending service life. This part is part of National’s Series 3000, Type 284 oil seal line, designed specifically for steering applications requiring reliable sealing under demanding conditions.

Compatible Vehicles and Applications

This steering knuckle seal is compatible with a range of vehicles, including:

• Buick Riviera and LeSabre models
• Cadillac Eldorado and Seville
• Chevrolet Blazer, S10, S10 Blazer, and Sonoma
• GMC Jimmy, S15, and Sonoma
• Isuzu Hombre and Bravada
• Oldsmobile Toronado and other select models

It is designed to maintain proper sealing in the steering knuckle assembly, helping to prevent oil leaks and contamination that can affect steering performance.

Common Issues Addressed by National 3553 Seal

• Prevents oil leaks from the steering knuckle area
• Protects steering components from dirt and debris ingress
• Reduces premature wear of steering system parts
• Maintains hydraulic pressure integrity in power steering systems
• Helps avoid costly steering system repairs due to seal failure

Installation Notes and Tips

When installing the National 3553 steering knuckle seal, ensure the housing bore and shaft surfaces are clean and free of debris. Use appropriate tools to press the seal evenly into place without damaging the sealing lip or flange. Verify the seal orientation matches the original part to maintain proper sealing function. Lubricate the sealing lip lightly with compatible oil before installation to reduce initial wear and facilitate assembly.

Quality Assurance and Warranty

National steering knuckle seals are manufactured to meet strict quality standards, using durable nitrile material and advanced surface treatments like Redicoat to enhance longevity. While specific warranty details are not provided, National products typically adhere to industry standards for reliability and performance in automotive sealing applications.