National 710605 Engine Crankshaft Seal - Front

Overview of National 710605 Engine Crankshaft Seal

The National 710605 engine crankshaft seal is designed to provide reliable sealing performance for select GM and Isuzu vehicles. Engineered with precision, this oil seal helps maintain engine integrity by preventing oil leaks around the crankshaft.

• Inside diameter: 1.512 inches (38.4 mm)
• Outside diameter: 2.337 inches (59.28 mm)
• Thickness/width: 0.339 inches (8.5 mm)
• Material: Durable PTFE for enhanced wear resistance
• Helix type: Clockwise-spiral lip design for effective sealing
• Housing bore size: 2.322 inches (58.98 mm)
• Part number: 710605, part of the 710600 series

Technical Details and Material Specifications

This National crankshaft seal features a PTFE (polytetrafluoroethylene) construction, known for its chemical resistance and low friction properties. The seal’s clockwise-spiral lip design ensures a tight fit around the crankshaft, minimizing oil leakage and contamination. With an inside diameter of 1.512 inches and an outside diameter of 2.337 inches, it fits precisely within the housing bore of 2.322 inches. The 0.339-inch thickness provides durability while maintaining flexibility for optimal sealing performance.

Compatible Vehicles and Applications

This engine crankshaft seal is compatible with various Buick, Chevrolet, GMC, Isuzu, and Oldsmobile models, including:

• Buick Rainier
• Chevrolet Trailblazer, Trailblazer EXT
• GMC Envoy, Envoy XL, Envoy XUV
• Isuzu Ascender, Bravada

Use the National 710605 seal to address common engine oil sealing issues in these vehicles, ensuring proper engine function and longevity.

Common Issues Addressed by the National 710605 Seal

• Prevents oil leaks around the crankshaft area
• Reduces contamination from dirt and debris entering the engine
• Maintains engine oil pressure and prevents premature wear
• Helps avoid costly engine repairs due to oil loss
• Improves overall engine reliability and performance

Installation Notes and Tips

• Ensure the crankshaft and housing bore are clean and free of debris before installation
• Use proper tools to avoid damaging the seal during installation
• Verify the seal orientation matches the clockwise-spiral lip design for optimal sealing
• Check for correct fitment by confirming dimensions against the vehicle specifications
• Consult vehicle service manual for torque specifications and installation procedures

Quality Assurance and Warranty Information

National’s 710605 engine crankshaft seal is manufactured to meet OEM standards for durability and performance. The PTFE material and precise engineering contribute to a long service life under normal operating conditions. While specific warranty details may vary, National typically offers coverage against manufacturing defects to ensure customer confidence in product reliability.