National 710604 Engine Crankshaft Seal - Front

Overview of National 710604 Engine Crankshaft Seal

The National 710604 engine crankshaft seal is designed to provide reliable sealing performance for select Buick and Cadillac models. Engineered with a fluoro-elastomer material and a clockwise-spiral lip design, this oil seal helps maintain engine integrity by preventing oil leaks around the crankshaft.

• Inside diameter: 2.058 inches (52.280 mm)
• Outside diameter: 2.628 inches (66.740 mm)
• Thickness/width: 0.311 inches (7.900 mm)
• Helix type: Clockwise-spiral lip design for effective sealing
• Material: Durable fluoro-elastomer for heat and chemical resistance
• Housing bore size: 2.622 inches (66.610 mm)

Technical Details and Specifications

This National 710604 crankshaft seal belongs to the 710600 series and is specifically designed to fit crankshafts with a 2.058-inch (52.280 mm) diameter. The seal’s outside diameter measures 2.628 inches (66.740 mm), matching the housing bore of 2.622 inches (66.610 mm) to ensure a precise fit. The 0.311-inch (7.900 mm) thickness provides a robust sealing surface, while the clockwise-spiral lip design enhances oil retention and reduces the risk of leakage under various operating conditions. Constructed from fluoro-elastomer, the seal offers resistance to high temperatures, oils, and automotive fluids, making it suitable for demanding engine environments.

Compatible Vehicles and Applications

This engine crankshaft seal is compatible with several Buick and Cadillac models, including:

• Buick Lucerne
• Cadillac DTS
• Cadillac SRX
• Cadillac STS
• Cadillac XLR

It is designed to replace worn or damaged crankshaft seals in these vehicles, helping to maintain proper engine oil containment and prevent contamination.

Common Issues Addressed by the National 710604 Seal

• Prevents oil leaks around the crankshaft area
• Reduces engine oil contamination and loss
• Minimizes risk of engine damage due to oil leakage
• Maintains proper engine pressure and lubrication
• Helps avoid costly repairs related to seal failure

Installation Notes and Tips

When installing the National 710604 crankshaft seal, ensure the housing bore and shaft surfaces are clean and free of debris. Proper alignment during installation is critical to avoid seal damage. Use appropriate tools to press the seal evenly into the housing bore without distortion. Verify the clockwise-spiral lip orientation matches the engine’s rotation direction for optimal sealing performance.

Quality Assurance and Warranty

National engine crankshaft seals are manufactured to meet industry standards for durability and performance. The fluoro-elastomer material and precision dimensions ensure consistent sealing under typical engine operating conditions. While specific warranty details are not provided, National products are generally backed by quality control processes to support reliable service life.