FAG SS4020 Engine Camshaft Seal

Engine Camshaft Seal for Subaru Applications

FAG SS4020 is an engine camshaft seal built with a polyacrylate sealing material and a rubber spring auxiliary-lip design. It is specified for select Subaru Impreza and Subaru Legacy applications, with dimensions that support a precise seal at the camshaft opening.

Key Features

• Part number SS4020 for catalog and service lookup
• Seal type: rubber, spring, auxiliary lip
• Sealing material: polyacrylate
• Bore diameter: 1.772 in. / 45.009 mm
• Seal outside diameter: 1.781 in. / 45.237 mm
• Seal width: 1.26 in. / 32.004 mm
• Compatible With 1993-2000 Subaru Impreza and 1990-1999 Subaru Legacy applications listed below

Detailed Description

FAG SS4020 is engineered as a camshaft seal for Subaru engines that require a seal with the listed bore, outside diameter, and width. The polyacrylate sealing material and auxiliary lip help maintain a controlled sealing surface at the camshaft opening, while the spring-loaded rubber construction supports consistent contact under engine operating conditions. This part number SS4020 is also referenced in service catalogs for Subaru Impreza and Subaru Legacy coverage, including vehicles identified by Schaeffler Seal Global Number 413 4020 100.

This part cross-references National 223230 for the same application.

Vehicle Fitment

• Fits 1993-2000 Subaru Impreza, N/A
• Fits 1990-1999 Subaru Legacy, N/A

What It Helps Address

• Oil seepage at the camshaft seal area
• Contamination entering the sealed engine opening
• Loss of sealing integrity from worn or hardened seal material
• Leak-related maintenance on Subaru Impreza and Subaru Legacy engines

Installation Notes and Tips

Verify the bore diameter, outside diameter, and seal width against the removed part before installation. Clean the sealing surface and surrounding area thoroughly, and inspect the camshaft journal and housing for wear or scoring that could affect sealing performance. Confirm the application by year, make, and model before ordering, especially on Subaru Impreza and Subaru Legacy vehicles with engine-specific service requirements.

Quality Assurance

FAG sources this seal to meet vehicle-manufacturer specifications and works with suppliers to maintain FAG quality standards. The seal is built to protect engine sealing points from dirt, dust, and moisture intrusion while helping retain lubricant at the bearing or seal interface over the service life of the component.