National 713103 Engine Crankshaft Seal - Front

Overview of National 713103 Engine Crankshaft Seal

The National 713103 engine crankshaft seal is designed for reliable sealing performance in Dodge and Jeep vehicles. Engineered with precision, this oil seal helps maintain engine integrity by preventing oil leaks around the crankshaft.

• Inside diameter: 2.180 inches (55.370 mm)
• Outside diameter: 3.194 inches (81.130 mm)
• Thickness/width: 0.620 inches (15.750 mm)
• Material: Durable fluoro-elastomer for heat and chemical resistance
• Clockwise-spiral lip design for effective sealing
• Redicoat surface treatment for enhanced wear protection
• Compatible housing bore: 3.190 inches (81.030 mm)

Technical Details and Specifications

The National 713103 crankshaft seal features a fluoro-elastomer construction, providing resistance to high temperatures and automotive fluids commonly found in Dodge and Jeep engines. Its clockwise-spiral lip design ensures a tight seal around the crankshaft, reducing the risk of oil leakage. The seal’s dimensions include a 2.180-inch inside diameter and a 3.194-inch outside diameter, fitting precisely into housings with a 3.190-inch bore. The 0.620-inch thickness offers durability and stability during engine operation. Additionally, the Redicoat treatment enhances the seal’s longevity by minimizing wear and friction.

Compatible Vehicles and Applications

This engine crankshaft seal is compatible with a range of Dodge and Jeep models, including:

• Dodge B150, B250, B350, B1500, B2500, B3500
• Dodge D150, D250, D350, Dakota, Durango
• Jeep Grand Cherokee, Grand Wagoneer, Ram 1500, Ram 2500, Ram 3500, Ramcharger
• Ram 1500 Van, Ram 2500 Van, Ram 3500 Van, W150, W250, W350

Common Issues Addressed by the National 713103 Seal

• Prevents oil leaks around the crankshaft area
• Reduces engine contamination from external debris
• Maintains proper oil pressure and lubrication
• Minimizes wear on crankshaft and housing bore
• Helps avoid costly engine repairs due to seal failure

Installation Notes and Tips

When installing the National 713103 crankshaft seal, ensure the housing bore and crankshaft surfaces are clean and free of debris. Use appropriate tools to press the seal evenly into the bore without damaging the lip. Verify the seal orientation matches the clockwise-spiral lip design for optimal sealing. Lubricate the seal lip 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

National engine seals are manufactured to meet OEM standards for fit, form, and function. The 713103 part is part of the 713000 series, known for consistent quality and durability. This product includes a limited warranty against defects in material and workmanship, providing confidence in its performance for Dodge and Jeep engine applications.