National 711126 Engine Crankshaft Seal - Rear

National 711126 Engine Crankshaft Seal Overview

The National 711126 engine crankshaft seal is designed for reliable oil sealing in various Chrysler, Dodge, Jeep, and Ram vehicles. Featuring a counter-clockwise-spiral lip design, this seal ensures effective containment of engine oil to maintain optimal engine performance.

• Counter-clockwise-spiral helix type for enhanced sealing
• Durable PTFE material construction
• Housing bore diameter: 4.724 inches (120.000 mm)
• Outside diameter: 4.736 inches (120.300 mm)
• Shaft diameter: 3.937 inches (100.000 mm)
• Width: 0.433 inches (11.000 mm)
• Part of the 711100 series

Technical Details and Material Specifications

This engine crankshaft seal from National is constructed using PTFE, a material known for its chemical resistance and low friction properties, which helps reduce wear and extend seal life. The counter-clockwise-spiral lip design improves oil retention by directing fluid back into the engine, minimizing leaks. With precise dimensions including a 4.724-inch housing bore and a 3.937-inch shaft diameter, the 711126 seal fits tightly to prevent oil seepage.

Compatible Vehicles and Applications

The National 711126 crankshaft seal is compatible with a range of Chrysler, Dodge, Jeep, and Ram models, including the Chrysler 300, Dodge Challenger, Charger, Durango, Jeep Grand Cherokee, Commander, and Ram 1500, 2500, and 3500 series trucks. This part is suitable for applications requiring a reliable oil seal in engines with matching bore and shaft dimensions.

Common Issues Addressed by the 711126 Crankshaft Seal

• Prevents engine oil leaks around the crankshaft
• Reduces contamination of engine components by sealing oil passages
• Minimizes wear on the crankshaft and housing bore
• Maintains engine oil pressure and efficiency
• Helps avoid costly engine repairs due to oil loss

Installation Notes and Tips

Ensure the crankshaft and housing bore are clean and free of debris before installation. Use appropriate tools to press the seal evenly into place without damaging the PTFE lip. Verify the helix direction matches the engine rotation to maintain proper sealing function. Lubricate the seal lip lightly with clean engine oil prior to installation to reduce initial wear.

Quality Assurance and Warranty Information

National's 711126 crankshaft seal is manufactured to meet OEM specifications for fit and function. The PTFE material and helix design contribute to long service life under normal operating conditions. While specific warranty details may vary, National typically offers coverage against manufacturing defects to ensure product reliability.