YEHERIT LS Gen 4 Valley Cover Plate Kit (Non-AFM/DOD) — Aluminium, Includes Gasket & O‑Rings

YEHERIT's LS Gen 4 valley cover plate kit is an aluminum replacement designed to stop oil leakage, protect the valley area and match OE fitment for many Chevy, GMC, Cadillac and Hummer V8 applications.

This upgraded valley cover kit provides a ready-to-install alternative to worn or corroded original valley plates on non-AFM DOD LS Gen 4 engines. Machined from premium aluminum with a sandblasted, painted finish, the plate is supplied with a matching aluminum gasket, eight O-rings and the bolt hardware required for a complete valley cover service. The kit lists replacement numbers including 12598832 and 12610141 — verify your vehicle fitment before ordering.

How does this cover stop oil leaks in the valley area?

The kit uses a precision-machined aluminum plate combined with an O-ring rubber seal system around key oil passages to block internal leaks. The aluminum gasket and included O-rings create stable sealing surfaces that resist flattening under heat, reducing seepage paths commonly found in aged plastic or corroded originals.

• O-ring design seals lifter oil passages and valley drains.
• Aluminum gasket resists compression set and heat degradation.
• Complete bolt kit lets you torque to proper spec for consistent clamping.

Will this plate fit my vehicle and how do I confirm compatibility?

The cover is intended for LS Gen 4 non-AFM/DOD valley pans used across many GM full-size platforms. It lists direct replacement numbers, but fitment depends on engine variant and model year, so a quick parts check is essential.

• Compatible makes: Chevrolet, GMC, Cadillac, Hummer (various models listed).
• Replacement numbers provided: 12598832, 12610141 to cross-check with OEM records.
• Confirm engine code and non-AFM/DOD configuration before purchase.

What materials and finishes are used, and why do they matter?

This cover is crafted from premium aluminum and receives a sandblasted and painted surface that improves texture, corrosion resistance and thermal durability compared with untreated metal. The finish reduces surface oxidation and helps the plate survive high-load engine environments and exposure to road salts or moisture.

• Sandblasted finish enhances paint adhesion and reduces glare.
• Painted surface adds a corrosion-resistant layer for long-term protection.
• Aluminum construction reduces weight while retaining strength.

What comes in the package and what do I need for installation?

The kit ships complete with the valley cover plate, an aluminum valley gasket, eight O-rings and eleven bolts so you can replace the entire cover assembly in one service. Basic hand tools and the ability to access the valley area are required; professional installation is recommended if you’re not comfortable with engine disassembly and torque specs.

• Included: 1 aluminum valley cover, 1 aluminum gasket, 8 O-rings, 11 bolts.
• Tools typically required: torque wrench, socket set, gasket scraper, RTV as applicable.
• Verify torque specs for your engine and inspect mating surfaces for cleanliness.

Who is this for: The YEHERIT LS Gen 4 valley cover plate kit is built for mechanics, restoration shops and DIY enthusiasts servicing non-AFM/DOD GM V8 engines who need a durable aluminum replacement with full seal hardware. It suits owners replacing a leaking or warped valley cover on Chevrolet Express, Silverado, Suburban, Tahoe, GMC Sierra, Yukon, Canyon, Savana, Cadillac Escalade and Hummer H2/H3 models provided the engine and valley configuration match. Choose this kit when you want an OEM-replacement fit, corrosion-resistant material and a complete hardware set to restore valley sealing and engine oil stability.