National 710235 Engine Crankshaft Seal - Rear

Overview of National 710235 Engine Crankshaft Seal

The National 710235 engine crankshaft seal is designed to provide reliable sealing performance for select Saab and Subaru vehicles. Engineered with precision, this oil seal helps maintain engine integrity by preventing oil leaks around the crankshaft.

• Inside diameter: 86.000 mm (3.386 inches)
• Outside diameter: 103.230 mm (4.064 inches)
• Thickness/width: 10.000 mm (0.394 inches)
• Material: Durable silicone construction
• Helix type: Counter-clockwise spiral lip design for effective sealing
• Compatible housing bore: 103.000 mm (4.055 inches)
• Part number: 710235, Series 710200

Technical Details and Specifications

This National 710235 crankshaft seal features a silicone material that offers resistance to heat and oil degradation, suitable for demanding engine environments. The counter-clockwise spiral lip design enhances sealing efficiency by maintaining consistent contact with the crankshaft, reducing the risk of oil leaks. With an inside diameter of 86 mm and an outside diameter of approximately 103.23 mm, this seal fits precisely within the housing bore of 103 mm, ensuring a secure fit. The 10 mm thickness provides durability and stability during engine operation.

Compatible Vehicles and Applications

This engine crankshaft seal is compatible with various Saab and Subaru models, including the Saab 9-2X and multiple Subaru vehicles such as the B9 Tribeca, Baja, Forester, Impreza, Legacy, Outback, Tribeca, WRX, and WRX STI. The part number 710235 is specifically designed to meet the sealing requirements of these models, making it a suitable replacement part for maintenance or repair.

• Prevents oil leaks around the crankshaft
• Helps maintain engine oil pressure
• Reduces contamination from dirt and debris
• Minimizes wear on crankshaft and engine components
• Supports engine longevity and performance

Installation Notes and Tips

When installing the National 710235 crankshaft seal, ensure the housing bore and crankshaft surfaces are clean and free of debris. Proper alignment is critical to avoid damage to the seal lip. Use appropriate tools to press the seal evenly into the housing bore without distortion. Verify the helix direction matches the counter-clockwise spiral lip design to maintain optimal sealing function. Follow vehicle-specific service manual instructions for torque specifications and installation procedures.

Quality Assurance and Warranty

National engine seals are manufactured to meet industry standards for durability and performance. The 710235 crankshaft seal undergoes rigorous quality control to ensure dimensional accuracy and material integrity. While specific warranty details may vary, National typically offers coverage against manufacturing defects, providing confidence in the product's reliability for Saab and Subaru engine applications.