Fel-Pro Engine Crankshaft Seal Kit BS 40640 — OEM-fit Front & Rear Seals for GM V8 (2002–2014)

Fel-Pro BS 40640 is a complete crankshaft seal kit engineered to restore a leak-free front and rear crankshaft seal fit for compatible GM-derived V8 engines.

This Fel-Pro seal kit replaces worn or damaged crankshaft seals with application-specific components manufactured to meet or exceed original equipment specifications. Designed and validated for professional repair use, the kit delivers the precise fit, material choice, and durability required to stop oil leaks at the crankshaft and maintain engine oil control under everyday driving conditions.

Which vehicles and engines does this crankshaft seal kit fit?

The BS 40640 kit is targeted at a range of GM-platform SUVs and cars produced in the 2002–2014 model years that use the same crankshaft sealing dimensions. It covers Isuzu Ascender, Buick Rainier, Buick LaCrosse/Allure models, and several Cadillac Escalade ESV and EXT model years listed by application. Always confirm fitment with your vehicle VIN or parts lookup before purchase.

• Compatible with 2003–2006 Isuzu Ascender and similar GM V8 platforms
• Fits 2004–2007 Buick Rainier; 2008–2009 Buick LaCrosse and Allure
• Includes 2002–2014 Cadillac Escalade ESV and EXT model year ranges as specified
• Verify fit using VIN or OEM part reference for exact engine match

How is the Fel-Pro kit constructed to prevent leaks?

Fel-Pro designs each seal with application-specific materials and profiles so the lip geometry, elastomers, and spring tension match the original sealing surface. Components are engineered to maintain an oil-tight interface with the crankshaft while resisting heat, oil additives, and movement caused by engine torque and vibration.

• Application-specific elastomers chosen for oil and temperature resistance
• Precision lip geometry for consistent sealing on the crankshaft journal
• Validated spring or reinforcement to retain sealing force over time
• Manufactured to meet or exceed OEM dimensional tolerances

What should I expect during installation and service life?

Installation follows standard crankshaft seal replacement procedures: remove the old seal, clean the housing and shaft, and press the new seal squarely into place. Because Fel-Pro parts are validated for fit, form, and function, they reduce the risk of reseating issues or premature failure when installed correctly and used with proper lubrication and torque specifications.

• Clean shaft and bore thoroughly before installing new seals
• Use light oil or assembly lubricant on seal lips to avoid dry starts
• Press seals evenly; avoid distorting the sealing lip or housing
• Inspect related components (rear main housing, timing cover) for wear

Will this Fel-Pro kit match OEM performance for repairs?

Yes—Fel-Pro engineered this kit specifically for repair applications to meet or exceed original equipment specifications. Each part is subjected to fitment validation so technicians get a dependable replacement that aligns with factory tolerances and professional repair expectations.

• Meets or exceeds original equipment specifications
• Engineered for professional repair applications and durability
• Quality-validated for fit, form, and function prior to shipping
• Backed by Fel-Pro’s reputation for sealing solutions in automotive repairs

Who is this for: The Fel-Pro BS 40640 crankshaft seal kit is intended for mechanics, restoration enthusiasts, and DIY technicians working on compatible GM-derived SUVs and sedans from the 2002–2014 ranges listed. Choose this kit when you need reliable, application-matched seals that restore oil control and conform to factory dimensions for a long-lasting repair.