National 710555 Engine Crankshaft Seal - Front

Overview of National 710555 Engine Crankshaft Seal

The National 710555 engine crankshaft seal is designed to provide reliable sealing performance for select Cadillac, Oldsmobile, and Pontiac models. Engineered with precision, this oil seal helps maintain engine integrity by preventing oil leaks around the crankshaft.

• Inside diameter: 2.047 inches (52.000 mm)
• Outside diameter: 2.630 inches (66.800 mm)
• Thickness: 0.354 inches (9.000 mm)
• Overall width with side lip: 0.457 inches (11.600 mm)
• Material: PTFE for enhanced durability and chemical resistance
• Helix type: Clockwise-spiral lip design for effective sealing
• Housing bore diameter: 2.622 inches (66.600 mm)
• Compatible with shaft diameter of 2.047 inches (52.000 mm)

Technical Details and Design Features

The National 710555 crankshaft seal is constructed from PTFE, a material known for its excellent wear resistance and ability to withstand high temperatures and chemical exposure. The seal features a clockwise-spiral lip design that enhances oil retention and reduces the risk of leakage under varying engine conditions. With precise dimensions including a 2.630-inch outside diameter and a 0.354-inch thickness, this seal fits securely within the housing bore of 2.622 inches, ensuring a tight and reliable fit on the crankshaft with a 2.047-inch diameter.

Compatible Vehicles and Applications

This engine crankshaft seal is compatible with a range of Cadillac, Oldsmobile, and Pontiac vehicles, including models such as the Cadillac DeVille, Eldorado, Seville, SRX, STS, and XLR, as well as the Oldsmobile Aurora and Pontiac Bonneville and Intrigue. The part number 710555 is specifically designed to meet the sealing requirements of these vehicles, making it a suitable replacement for maintaining engine performance and preventing oil leaks.

Common Issues Addressed by the National 710555 Seal

• Prevents oil leaks around the crankshaft area
• Reduces contamination of engine oil by external debris
• Maintains proper oil pressure within the engine
• Minimizes wear on the crankshaft and surrounding components
• Helps avoid engine damage caused by oil loss

Installation Notes and Tips

When installing the National 710555 crankshaft seal, ensure the housing bore and shaft 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 clockwise-spiral lip design for optimal performance. It is recommended to inspect the crankshaft for wear or damage before installation to ensure a proper seal.

Quality Assurance and Warranty

National manufactures the 710555 crankshaft seal to meet industry standards for durability and performance. The use of PTFE material and precise engineering supports long service life under normal operating conditions. While specific warranty details may vary, National products typically come with a limited warranty against manufacturing defects, providing confidence in the product's reliability.