YEHERIT LS Gen 4 Valley Cover Plate Kit — 12598832 Non-AFM/DOD Aluminum with Gasket & O-rings

YEHERIT's LS Gen 4 valley cover plate kit is an aluminum replacement assembly designed to seal the valley on non-AFM/DOD V8 engines, preventing oil leaks and restoring factory fitment.

This valley cover plate replaces worn or leaking OEM valley pans on many GM LS Gen 4 engines. Machined from robust aluminum with a textured, painted finish, the plate ships as a complete kit — gasket, O-rings and hardware included — to simplify installation and deliver a durable, corrosion-resistant sealing surface for heavy-duty use and variable climates.

Which vehicles and engines will this plate fit?

The YEHERIT assembly fits a broad range of GM models using LS Gen 4 non-AFM/DOD valley pans. Confirm year and engine code before purchasing to ensure correct match.

• Chevrolet: Express 1500–4500, Silverado 1500/2500 HD, Suburban 2500, Tahoe
• GMC: Canyon, Savana 1500–4500, Sierra 1500/2500 HD, Yukon
• Also compatible with Cadillac Escalade and Hummer H2/H3 applications using same valley configuration
• Serves as replacement for OE numbers 12598832 and 12610141

What components come in the kit and why they matter?

The kit arrives ready-to-install with all critical sealing parts so you won’t need to source extras. Proper gaskets and fasteners help create a reliable seal and reduce the chance of oil intrusion into the valley area.

• 1x aluminum valley cover plate with sandblasted, painted finish
• 1x aluminum valley cover gasket matched to the plate geometry
• 8x O-rings for internal oil passage sealing
• 11x bolts sized for direct replacement of original hardware

How does this design improve durability and sealing?

Manufactured from premium aluminum and finished with a sandblasted paint coat, the plate resists corrosion and heat better than typical stamped steels or softer materials. The included O-ring rubber seal design targets oil passages to limit internal leaks that can cause lifter and oil-pressure issues when uncontrolled.

• Aluminum body reduces corrosion risk and holds shape under heat
• Sandblasted, painted surface improves texture and longevity
• O-ring seals block oil passages to stabilize pressure and reduce leaks
• Complete hardware eliminates fitment guesswork during installation

Is installation straightforward for a home mechanic?

Yes — the kit is made to replace the OE valley cover directly and includes all necessary fasteners and seals. Basic mechanical skills and common tools are required; follow torque specs and a clean sealing surface for best results.

• Direct-replacement bolt pattern for simple swap-in
• Includes gasket and O-rings—no extra parts usually needed
• Recommended: clean mating surfaces and use specified torque values
• One-year product support from YEHERIT for questions after purchase

Who is this for: This valley cover plate kit is aimed at owners and technicians working on GM LS Gen 4 V8 engines without AFM/DOD who need a durable, ready-to-install replacement. It’s appropriate for daily drivers, trucks under heavy duty, restoration projects, and garages that prefer an aluminum cover with complete sealing hardware included. Verify vehicle compatibility and OE numbers before ordering to ensure correct fitment.