National 1108 Engine Intermediate Shaft Seal - Front

Overview of National 1108 Engine Intermediate Shaft Seal

The National 1108 Engine Intermediate Shaft Seal is designed to provide reliable sealing performance for various Audi, Isuzu, Suzuki, Volkswagen, and Volvo models. Engineered with a fluoro-elastomer sealing material and a clockwise-spiral lip design, this oil seal ensures effective containment of engine fluids and protection against contaminants.

• Inside diameter: 1.378 inches (35.000 mm)
• Outside diameter: 1.906 inches (48.400 mm)
• Thickness/width: 0.276 inches (7.000 mm)
• Helix type: Clockwise-spiral lip design for enhanced sealing
• Material: Durable fluoro-elastomer for heat and chemical resistance
• Housing bore compatibility: 1.890 inches (48.000 mm)
• Part number: 1108

Technical Details and Specifications

This National 1108 engine intermediate shaft seal is part of the 1000 series and is constructed from fluoro-elastomer, a material known for its resistance to high temperatures, oils, and chemicals commonly found in automotive engines. The seal features a clockwise-spiral lip design that improves sealing efficiency by directing contaminants away from the shaft. With an inside diameter of 1.378 inches and an outside diameter of 1.906 inches, it fits precisely within a housing bore of 1.890 inches, ensuring a secure and leak-free installation. The 0.276-inch thickness provides durability without compromising flexibility.

Compatible Vehicles and Applications

This engine intermediate shaft seal is compatible with a range of vehicles, including Audi models such as the 80, 80 Quattro, 90, 90 Quattro, 100, 100 Quattro, 200, 200 Quattro, A4, A4 Quattro, A6, A6 Quattro, A8 Quattro, Allroad Quattro, S4, S6, and S8. It also fits Isuzu Amigo, Rodeo, and Rodeo Sport, Suzuki Swift+, Volkswagen Golf, Jetta, Passat, Phaeton, EuroVan, Touareg, and V8 Quattro, as well as Volvo 740, 745, 760, 4000, 4000 Quattro, and 5000 Quattro models. The National 1108 seal is designed to maintain engine integrity by preventing oil leaks and contamination in these specific applications.

Common Issues Addressed by the National 1108 Seal

• Prevents oil leaks from the engine intermediate shaft
• Protects against dirt and debris entering the engine
• Reduces wear on the shaft and surrounding components
• Maintains engine pressure and fluid containment
• Helps avoid premature engine component failure

Installation Notes and Tips

When installing the National 1108 engine intermediate shaft seal, ensure the housing bore is clean and free of debris. Use appropriate tools to press the seal evenly into place without damaging the lip or sealing surface. Verify the shaft diameter matches the seal’s inside diameter of 1.378 inches to ensure proper fitment. 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 manufactures the 1108 engine intermediate shaft seal to meet industry standards for durability and performance. The fluoro-elastomer material and precise engineering provide reliable sealing under demanding engine conditions. While specific warranty details may vary, National products typically come with a limited warranty against manufacturing defects, ensuring confidence in the product’s quality and longevity.