National 710855 Engine Crankshaft Seal - Rear

Overview of National Engine Crankshaft Seal 710855

The National 710855 engine crankshaft seal is designed to provide reliable sealing performance for various GM and Suzuki vehicles. Engineered with a counter-clockwise-spiral lip design and made from durable PTFE material, this oil seal ensures effective protection against oil leaks and contamination.

• Inside diameter: 3.898 inches (99.000 mm)
• Outside diameter: 4.539 inches (115.300 mm)
• Thickness/width: 0.394 inches (10.000 mm)
• Counter-clockwise helix type spiral lip design
• Material: PTFE for enhanced durability and chemical resistance
• Compatible housing bore: 4.528 inches (115.000 mm)
• Part number: 710855, Series 710800

Technical Details and Material Specifications

This National crankshaft seal features a PTFE (Polytetrafluoroethylene) sealing lip, which offers excellent resistance to heat, oil, and wear. The counter-clockwise spiral lip design improves sealing efficiency by maintaining consistent contact with the crankshaft, reducing the risk of oil leakage. The seal’s dimensions are precisely engineered to fit a shaft diameter of 3.898 inches and a housing bore of approximately 4.528 inches, making it suitable for specific engine applications.

Compatible Vehicles and Applications

This engine crankshaft seal 710855 is compatible with a range of vehicles including Buick, Cadillac, Chevrolet, GMC, Pontiac, Saab, Saturn, and Suzuki models. Notable compatible models include the Buick LaCrosse, Cadillac CTS, Chevrolet Camaro, GMC Acadia, Pontiac G6, Saab 9-3, Saturn Vue, and Suzuki Grand Vitara. It is designed to replace worn or damaged crankshaft seals in these vehicles, ensuring proper engine oil containment.

Common Issues Addressed by the National 710855 Seal

• Prevents oil leaks around the crankshaft area
• Reduces engine contamination from external debris
• Maintains proper oil pressure by sealing the crankshaft housing
• Minimizes premature wear of engine components due to oil loss
• Helps avoid costly engine repairs related to seal failure

Installation Notes and Tips

When installing the National 710855 crankshaft seal, ensure the housing bore and shaft are clean and free of debris. Use appropriate tools to press the seal evenly into the housing bore without damaging the sealing lip. Verify the seal orientation matches the counter-clockwise spiral lip design for optimal performance. It is recommended to inspect the crankshaft surface for wear or damage before installation.

Quality Assurance and Warranty

National engine seals are manufactured to meet OEM specifications, providing reliable sealing performance and durability. The PTFE material and precision design contribute to long service life under normal operating conditions. While specific warranty details are not provided, National products typically adhere to industry standards for quality and reliability.