SKF 20557A Engine Timing Cover Seal

SKF 20557A Engine Timing Cover Seal

SKF 20557A is an engine timing cover seal built for applications that need controlled sealing around the shaft diameter and timing cover interface. With a 2.058 shaft diameter, 0.311 width, and HMA10 seal type, it is specified for a precise fit in supported Buick, Cadillac, and related GM applications.

Compatible With 2006-2011 Buick Lucerne, 2006-2011 Cadillac DTS, 2006-2010 Cadillac STS, 2008-2009 Cadillac SRX, 2006 Cadillac SRX, and 2006-2009 Cadillac XLR. This SKF 20557A seal is a direct-fit service part for timing cover sealing needs on these vehicles.

Key Features

• Engine timing cover seal for sealing the timing cover area
• HMA10 seal type for application-specific sealing performance
• 2.058 shaft diameter for the listed fitments
• 0.311 width for proper seal placement
• SKF engineered seal design based on long-term sealing development
• Made with premium materials selected for the application and operating environment

Detailed Description

SKF 20557A is designed for engine sealing applications where maintaining lubricant retention and keeping contaminants out are critical. SKF has a long history in seal engineering, and this part reflects that experience with a design and material selection focused on fit, durability, and sealing consistency. For drivers and technicians servicing a Buick Lucerne, Cadillac DTS, Cadillac STS, Cadillac SRX, or Cadillac XLR, this timing cover seal supports the original sealing function at the engine front cover area.

This part cross-references Monroe Shocks & Struts (e.g., 12576050) for the same application.

What It Helps Address

• Oil seepage at the timing cover seal area
• Contamination entering the sealed engine interface
• Loss of sealing integrity from worn or hardened seal material
• Service replacement for a leaking front engine cover seal
• Fitment-related sealing issues on listed GM vehicles

Installation Notes and Tips

Inspect the sealing surface, shaft condition, and timing cover area before installation. Clean all mating surfaces thoroughly and verify the seal orientation matches the application before pressing it into place. Use proper installation tools to avoid damaging the sealing lip or distorting the seal body.

Quality Assurance

SKF manufactures seals to specific designs using premium materials and quality-controlled production standards. The brand’s seal engineering heritage dates back to the first integrated shaft seal, and SKF products are built for long service life and dependable sealing performance in automotive applications.