Timken 5291 Engine Crankshaft Seal - Rear

Timken 5291 Engine Crankshaft Seal

Timken 5291 is an engine crankshaft seal built for rear-position applications across a wide range of Buick, Cadillac, Oldsmobile, and Pontiac vehicles. It is engineered to retain lubricant at the seal lip while helping block dirt and debris from entering the sealing area.

Key Features

• Precision sealing design helps control oil and grease leakage
• Reinforced outer case helps reduce installation damage and improve durability
• Ribbed rubber inner diameter helps seal minor spindle imperfections and promote positive seating
• Internal contamination exclusion system helps limit debris intrusion that can lead to leakage
• Vent holes help circulate lubricant around the seal lip to reduce heat buildup
• Fits rear crankshaft and manual transmission output shaft seal applications listed for Buick, Cadillac, Oldsmobile, and Pontiac

Detailed Description

Built for demanding drivetrain and engine sealing service, Timken 5291 is a rear seal solution for applications such as the Buick LeSabre, Buick Regal, Pontiac Grand Prix, and Cadillac DeVille. The seal’s reinforced construction and contamination-control features are designed to support consistent sealing performance in vehicles where lubricant retention and debris exclusion are critical. This part number, 5291, is listed across 1968-2009 model years in the fitment data and is used in multiple rear-position applications, including manual transmission output shaft seal and engine crankshaft seal configurations.

This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.

What It Helps Address

• Rear main or crankshaft oil seepage
• Lubricant loss at the sealing surface
• Contamination entering the seal area
• Wear from minor shaft surface imperfections
• Heat buildup around the seal lip

Installation Notes and Tips

• Verify the exact rear-position application before installation.
• Inspect the shaft or spindle surface for scoring, corrosion, or excessive wear.
• Clean the sealing bore and surrounding area thoroughly before pressing the seal in.
• Install squarely to avoid lip distortion and premature leakage.
• Confirm the application-specific seal orientation for the vehicle and transmission setup.

Quality Assurance

Timken manufactures this seal with precision sealing features and reinforced construction intended for dependable service in engine and drivetrain applications. The design focuses on lubricant control, contamination exclusion, and durability in rear seal locations.