National 227040 Engine Crankshaft Seal - Rear

Overview of National 227040 Engine Crankshaft Seal

The National 227040 engine crankshaft seal is designed specifically for Volkswagen Beetle models, providing reliable sealing performance. Engineered with precision, this oil seal helps maintain engine integrity by preventing oil leaks around the crankshaft.

• Compatible with Volkswagen Beetle vehicles
• Inside diameter: 70.000 mm (2.756 inches)
• Outside diameter: 90.320 mm (3.554 inches)
• Thickness: 10.000 mm (0.394 inches)
• Counter-clockwise spiral lip design for effective sealing
• Constructed from durable polyacrylate material
• Redicoat surface treatment for enhanced wear resistance
• Part of the National 220000 series

Technical Details and Design Features

The National 227040 crankshaft seal features a counter-clockwise spiral lip design that ensures a tight seal around the crankshaft, reducing the risk of oil leakage. Its polyacrylate construction offers resistance to heat and oil degradation, suitable for the operating conditions of Volkswagen Beetle engines. The seal measures 70 mm in inside diameter and 90.32 mm in outside diameter, with a thickness of 10 mm, matching the housing bore size of 90 mm to ensure a precise fit. The Redicoat coating enhances the seal’s durability by providing additional protection against wear and corrosion.

Application and Problem Solving

This engine crankshaft seal is used to maintain proper oil containment within the engine, preventing contamination and loss of lubrication. It addresses several common issues including:

• Preventing oil leaks around the crankshaft area
• Reducing engine oil contamination
• Minimizing wear on the crankshaft and housing bore
• Maintaining engine performance by preserving oil pressure
• Protecting against dirt and debris ingress

Installation Notes and Tips

When installing the National 227040 crankshaft seal on a Volkswagen Beetle, 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 coating. Verify the orientation of the counter-clockwise spiral lip design to match the crankshaft rotation direction. Lubricate the seal lip lightly with engine oil before installation to reduce initial wear.

Quality Assurance and Warranty

National’s 220000 series crankshaft seals, including part number 227040, are manufactured to meet industry standards for durability and performance. The polyacrylate material and Redicoat treatment contribute to long service life under typical operating conditions. While specific warranty details may vary, National products generally come with a limited warranty against manufacturing defects, ensuring reliability for Volkswagen Beetle owners.