Elring 686.870 Engine Crankshaft Seal - Rear

Overview of Elring Engine Crankshaft Seal 686.870

The Elring 686.870 engine crankshaft seal is designed for reliable sealing performance in select Dodge, Jeep, and Mercedes-Benz vehicles. Engineered with durable materials and precise dimensions, this seal helps maintain engine integrity by preventing oil leaks around the crankshaft.

• Material: PTFE (polytetrafluoroethylene) combined with ACM (polyacrylate rubber) for enhanced durability and chemical resistance
• Inside Diameter: 93.0 mm, ensuring a precise fit for compatible crankshafts
• Housing Type: Aluminium housing for lightweight strength and corrosion resistance
• Radial Shaft Seal Design: SP type, optimized for effective sealing under radial shaft movement
• Swirl Type: LD, designed to improve sealing efficiency and reduce leakage

Detailed Product Description

The Elring 686.870 crankshaft seal features a PTFE and ACM composite material that offers excellent wear resistance and flexibility, suitable for high-temperature engine environments. The aluminium housing provides structural support while resisting corrosion, which is critical for long-term engine performance. With a 93.0 mm inside diameter, this seal is engineered to fit specific crankshaft sizes found in various Dodge, Jeep, and Mercedes-Benz models, including the Grand Cherokee, E320, ML350, and Sprinter 3500 series. The SP radial shaft seal design combined with the LD swirl type enhances the seal's ability to maintain a tight barrier against oil leaks, even under dynamic engine conditions.

Compatible Vehicles and Applications

• Dodge Grand Cherokee
• Jeep Grand Cherokee
• Mercedes-Benz E320, E350, GL320, GL350, GLE350d, GLS350d
• Mercedes-Benz ML320, ML350
• Mercedes-Benz R320, R350, S350
• Mercedes-Benz Sprinter 2500, Sprinter 3500, Sprinter 3500XD

Common Issues Addressed by This Crankshaft Seal

• Prevents oil leaks around the crankshaft area
• Reduces engine contamination from external debris
• Maintains proper oil pressure by sealing the crankshaft housing
• Minimizes wear on crankshaft bearings caused by oil leakage
• Helps avoid costly engine repairs related to seal failure

Installation Notes and Tips

• Ensure the crankshaft surface is clean and free of debris before installation
• Use appropriate tools to avoid damaging the PTFE/acm sealing lip during fitting
• Verify the inside diameter (93.0 mm) matches the crankshaft specifications of your vehicle
• Apply a thin layer of engine oil to the seal lip to facilitate smooth installation
• Check for proper seating of the aluminium housing to prevent misalignment

Quality Assurance and Warranty

Elring manufactures the 686.870 crankshaft seal to meet stringent automotive standards, ensuring reliable sealing performance and durability. The use of high-quality PTFE and ACM materials combined with precision aluminium housing construction supports long service life. While specific warranty details may vary, Elring products typically come with manufacturer-backed quality guarantees to protect against defects in materials and workmanship.