National 710842 Engine Crankshaft Seal - Front

Overview of National Engine Crankshaft Seal 710842

The National 710842 engine crankshaft seal is designed for reliable sealing performance in Chrysler, Dodge, Jeep, and Ram vehicles. Engineered with a bi-directional lip design and made from durable PTFE material, this oil seal ensures effective protection against oil leaks and contamination.

• Inside diameter: 1.988 inches (50.5 mm)
• Outside diameter: 2.988 inches (75.98 mm)
• Thickness: 0.406 inches (10.31 mm)
• Bi-directional helix lip design for enhanced sealing
• Material: PTFE for durability and chemical resistance
• Overall width with side lip: 0.748 inches (19 mm)
• Compatible with housing bore of 2.975 inches (75.56 mm)

Technical Details and Specifications

The National 710842 crankshaft seal features a precise fit with an inside diameter of 1.988 inches (50.5 mm) and an outside diameter of 2.988 inches (75.98 mm), matching the housing bore size of 2.975 inches (75.56 mm). Its thickness of 0.406 inches (10.31 mm) and overall width including the side lip of 0.748 inches (19 mm) provide a secure seal around the crankshaft. The bi-directional helix lip design improves sealing efficiency by preventing oil leakage in both rotational directions. Constructed from PTFE, this seal offers excellent resistance to heat, wear, and automotive fluids, making it suitable for demanding engine environments.

Compatible Vehicles and Applications

This engine crankshaft seal is compatible with a range of Chrysler, Dodge, Jeep, and Ram models, including the Chrysler 300, Dodge Challenger, Charger, Durango, and Magnum, Jeep Commander and Grand Cherokee, as well as Ram 1500, 1500 Classic, 2500, and 3500 trucks. The National 710842 seal is designed to meet the specifications required for these vehicles’ engine sealing systems, ensuring proper fit and function.

Common Issues Addressed by the National 710842 Seal

• Prevents oil leaks around the crankshaft
• Reduces contamination ingress into the engine
• Minimizes wear on the crankshaft and housing bore
• Maintains engine oil pressure and efficiency
• Helps avoid costly engine repairs due to seal failure

Installation Notes and Tips

When installing the National 710842 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 sealing lip. Verify the seal orientation matches the bi-directional lip design for optimal performance. Lubricate the seal lip lightly with clean engine oil before installation to reduce initial wear. Follow vehicle-specific service manual instructions for torque specifications and installation procedures.

Quality Assurance and Warranty

Manufactured by National, a trusted brand in engine sealing systems, the 710842 crankshaft seal is produced to meet industry standards for durability and performance. The PTFE material and bi-directional lip design contribute to long service life under normal operating conditions. Warranty coverage details should be confirmed with the original equipment manufacturer or distributor.