Corteco 01020317b Ring

Product Overview

The Corteco 01020317B Ring, also known as a shaft seal or wheel hub seal, is an essential component designed for the rear differential of various BMW models. It provides a reliable barrier against oil leakage while allowing smooth rotation between the differential housing and the axle shaft.

Key Features

• Material Composition: High‑performance ACM polyacrylate rubber, engineered for durability under high temperature and pressure conditions.
• Design Precision: The ring features a tapered inner diameter that mates perfectly with the differential housing, ensuring an airtight seal during operation.
• Compatibility Range: Fits BMW models including the 3 Series (E30, E36), 5 Series (E34), Z1, Z3, and various compact and sedan variants. It is also suitable for other OEMs that use the same differential geometry.
• Dimensions: Outer diameter 44 mm, inner diameter 67 mm, thickness 10 mm – a standard size that matches the original equipment specification.
• Installation Ease: Designed for quick replacement; no special tooling required beyond standard automotive tools. The ring slides onto the axle shaft and seats into the differential housing with minimal force.

Technical Specifications

Installation Guide

1. Preparation: Ensure the differential housing is clean. Remove any old seal remnants with a scraper or a soft brush.
2. Aligning the Ring: Position the new ring on the axle shaft, aligning the tapered edge with the housing bore.
3. Seating the Seal: Gently slide the ring into place until it fully engages the differential housing. Avoid forcing; a slight tap may be necessary to seat the seal properly.
4. Final Check: Verify that the ring sits flush and there are no gaps. Reassemble any removed components and test for oil leakage during a short drive.

Maintenance Tips

• Inspect the seal periodically for signs of wear, cracking, or deformation.
• Avoid exposure to harsh chemicals that can degrade rubber; use approved automotive lubricants only.
• If the differential housing is damaged or warped, replace it before installing a new ring to prevent premature failure.

Why Choose Corteco?

Corteco has a long-standing reputation for producing high‑quality sealing solutions that meet OEM specifications. The 01020317B Ring exemplifies this commitment, offering:

• Reliability: Proven performance in demanding automotive environments.
• Consistency: Strict quality control ensures each ring meets the exact dimensions required for a perfect fit.
• Longevity: The ACM material resists oil absorption and temperature fluctuations, extending service life.

Applications Beyond BMW

While primarily designed for BMW rear differentials, the ring’s universal dimensions make it suitable for other vehicles that share similar differential housings. Mechanics often use it as a drop‑in replacement in aftermarket or custom builds where OEM parts are scarce.

Conclusion

The Corteco 01020317B Ring is a critical component that ensures the integrity of the rear differential by preventing oil leaks and maintaining proper lubrication. Its precise engineering, durable material, and broad compatibility make it an indispensable choice for automotive technicians and enthusiasts alike.