National 320348 Engine Crankshaft Seal - Front

Overview of National Engine Crankshaft Seal 320348

The National 320348 engine crankshaft seal is designed to provide reliable sealing performance for various Chrysler, Dodge, Jeep, Land Rover, Mini, Mitsubishi, and Plymouth vehicles. Engineered with precision, this oil seal helps maintain engine integrity by preventing oil leaks around the crankshaft.

• Inside diameter: 1.260 inches (32.000 mm)
• Outside diameter: 1.780 inches (45.210 mm)
• Thickness/width: 0.236 inches (6.000 mm)
• Material: Durable fluoro-elastomer for heat and chemical resistance
• Clockwise-spiral lip design for effective sealing
• Compatible housing bore: 1.772 inches (45.000 mm)

Technical Details and Material Specifications

This National crankshaft seal (part number 320348) features a fluoro-elastomer construction, which offers enhanced resistance to high temperatures, oils, and automotive fluids. The seal’s clockwise-spiral lip design improves sealing efficiency by directing contaminants away from the shaft, reducing wear and extending service life. With an inside diameter of 1.260 inches and an outside diameter of 1.780 inches, this seal fits shafts and housings precisely, ensuring a secure fit in the engine assembly.

Compatible Vehicles and Applications

The National 320348 crankshaft seal is compatible with a range of vehicles including Chrysler Avenger, Dodge Caravan, Jeep Wrangler, Land Rover Freelander, Mini Cooper, Mitsubishi Eclipse, and Plymouth Neon models. It is suitable for use in engine sealing systems where maintaining oil containment around the crankshaft is critical.

Common Issues Addressed by This Crankshaft Seal

• Prevents oil leaks from the crankshaft area
• Reduces contamination ingress into the engine
• Minimizes premature wear of engine components
• Maintains engine oil pressure and cleanliness
• Helps avoid costly engine repairs due to seal failure

Installation Notes and Tips

Ensure the crankshaft and housing bore are clean and free of debris before installation. Verify the correct orientation of the seal, with the spiral lip facing the oil side to optimize sealing performance. Use appropriate tools to press the seal evenly into the housing bore without damaging the lip or seal body. Check for proper fitment on the shaft diameter of 1.260 inches and housing bore of 1.772 inches.

Quality Assurance and Warranty Information

National engine crankshaft seals are manufactured to meet industry standards for durability and performance. The fluoro-elastomer material and precision design contribute to consistent sealing under demanding engine conditions. This product is part of the National 320000 series, known for reliable sealing solutions. Warranty coverage details should be confirmed with the original equipment manufacturer or distributor.