National 5288 Engine Crankshaft Seal - Rear

Overview of National 5288 Engine Crankshaft Seal

The National 5288 engine crankshaft seal is designed to provide reliable sealing performance for various Ford, Land Rover, Mazda, and Mercury vehicles. Engineered with precision, this oil seal kit ensures proper fitment and durability for models such as the Ford Explorer, Mustang, and Land Rover LR3.

• Inside diameter: 2.379 inches (60.430 mm)
• Outside diameter: 3.012 inches (76.500 mm)
• Thickness/width: 0.800 inches (20.320 mm)
• Material: PTFE for enhanced wear resistance and sealing
• Compatible with multiple Ford, Land Rover, Mazda, and Mercury models

Technical Specifications and Material Details

The National 5288 crankshaft seal features a PTFE (Polytetrafluoroethylene) sealing lip, which offers excellent chemical resistance and low friction properties. The seal’s inside diameter measures 2.379 inches (60.430 mm), matching the shaft size for a secure fit. Its outside diameter is 3.012 inches (76.500 mm), designed to fit precisely within the engine housing. The thickness of 0.800 inches (20.320 mm) ensures adequate sealing surface area to prevent oil leaks under various operating conditions.

Compatible Vehicles and Applications

This engine crankshaft seal is compatible with a range of vehicles, including:

• Ford Explorer, Explorer Sport, Explorer Sport Trac, Mustang, Ranger, Aerostar, Bronco II, B4000, Pinto
• Land Rover LR3
• Mazda Bobcat
• Mercury Mountaineer, Capri, Navajo, Fiesta

Use the National 5288 seal when replacing worn or damaged crankshaft seals on these models to maintain engine oil integrity and prevent contamination.

Common Issues Addressed by the National 5288 Seal

• Prevents oil leaks around the crankshaft
• Reduces risk of engine contamination from dirt and debris
• Maintains proper oil pressure within the engine
• Minimizes wear on the crankshaft and seal interface
• Helps avoid costly engine repairs due to oil loss

Installation Notes and Tips

Ensure the crankshaft and housing surfaces are clean and free of debris before installation. Use appropriate tools to press the seal evenly into place without damaging the PTFE lip. Verify the seal orientation matches the engine manufacturer’s specifications. After installation, inspect for leaks during initial engine operation and retighten components as necessary.

Quality Assurance and Warranty

National engine seals are manufactured to meet OEM standards for fit, form, and function. The PTFE material provides durability under high temperature and pressure conditions typical of engine environments. While specific warranty details may vary, National products generally come with a limited warranty against manufacturing defects to ensure customer confidence in product reliability.