National 2955 Engine Crankshaft Seal - Front

Overview of National 2955 Engine Crankshaft Seal

The National 2955 engine crankshaft seal is designed to provide reliable sealing performance for various Ford, Mazda, and Mercury vehicles. Engineered with polyacrylate material and a clockwise-spiral lip design, this oil seal helps maintain engine integrity by preventing oil leaks around the crankshaft.

• Inside diameter: 1.709 inches (43.410 mm)
• Outside diameter: 2.213 inches (56.210 mm)
• Thickness: 0.292 inches (7.420 mm)
• Flanged outside diameter: 2.378 inches (60.400 mm)
• Sealing material: Polyacrylate with Redicoat treatment
• Helix type: Clockwise-spiral lip design for effective sealing
• Housing bore diameter: 2.205 inches (56.010 mm)
• Series: 2000, Type 71 oil seal

Technical Details and Material Specifications

This National 2955 crankshaft seal is constructed from durable polyacrylate, a material known for its resistance to heat, oil, and wear. The seal features a clockwise-spiral lip design that enhances sealing efficiency by directing contaminants away from the shaft. The Redicoat treatment adds an extra layer of protection against corrosion and extends the seal’s service life. With precise dimensions including a 1.709-inch inside diameter and a 2.213-inch outside diameter, this seal fits securely within the housing bore of 2.205 inches, ensuring a tight and reliable fit.

Compatible Vehicles and Applications

This engine crankshaft seal is compatible with a range of Ford, Mazda, and Mercury models, including the Ford Mustang, Ranger, Thunderbird, and Aerostar, as well as the Mazda B2300 and B2500, and Mercury Cougar and Marquis. The National 2955 is specifically designed to meet the sealing requirements of these vehicles, making it suitable for engine maintenance and repair tasks involving crankshaft oil seals.

Common Issues Addressed by the National 2955 Seal

• Prevents oil leaks around the crankshaft area
• Reduces contamination ingress into the engine
• Minimizes wear on the crankshaft and housing bore
• Maintains engine oil pressure and cleanliness
• Protects against premature seal failure due to heat and corrosion

Installation Notes and Tips

When installing the National 2955 crankshaft 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. Verify the seal orientation matches the clockwise-spiral lip design for optimal performance. Lubricate the sealing surface lightly with engine oil before installation to reduce initial wear. Follow vehicle-specific service manual instructions for torque specifications and installation procedures.

Quality Assurance and Warranty Information

National’s 2000 series crankshaft seals, including part number 2955, are manufactured to meet industry standards for durability and performance. The polyacrylate material combined with Redicoat treatment ensures resistance to oil, heat, and corrosion. While specific warranty details may vary, National typically offers coverage against manufacturing defects to support professional automotive repair needs.