{"product_id":"autobaba-engine-rear-main-seal-cover-kit-for-gm-4-8-6-2l-trucks-suv-aluminum-gasket-bolts","title":"AUTOBABA Engine Rear Main Seal Cover Kit for GM 4.8–6.2L Trucks SUV — Aluminium, Gasket \u0026 Bolts","description":"\u003cp\u003e\u003cstrong\u003eAUTOBABA Engine Rear Main Seal Cover Kit is a direct-fit aluminum replacement kit that includes gasket and fastening hardware to restore rear crankseal integrity on many GM V6 and V8 engines.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eDesigned as a drop-in replacement for worn or damaged rear main seal covers, this kit matches OEM dimensions and bolt patterns for a wide range of Chevrolet, GMC, Cadillac, Buick, Pontiac, Saab, Hummer and select Isuzu applications. Constructed from corrosion-resistant aluminum and supplied with a precision-cut gasket and bolts, the assembly helps stop oil leaks at the rear crankshaft opening while maintaining correct alignment with the engine block. Review fitment notes carefully—part numbers replaced include 635-518, 12633579 and 12639250—to ensure compatibility with your vehicle before ordering.\u003c\/p\u003e\n\n\u003ch3\u003eWill this cover stop an oil leak at the rear crankshaft?\u003c\/h3\u003e\n\u003cp\u003eWhen the original rear main seal cover is warped, cracked or corroded the seal can fail and allow engine oil to leak. Replacing the cover with a properly machined aluminum unit and a fresh gasket restores the sealing surface and prevents oil migration around the crankshaft area. Installation should include a new crankshaft rear seal if the seal itself is worn.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eAluminum construction resists corrosion and warping\u003c\/li\u003e\n  \u003cli\u003eIncludes gasket and bolts for a complete installation\u003c\/li\u003e\n  \u003cli\u003eOEM-style bolt pattern for correct alignment\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow do I confirm this kit fits my truck or SUV?\u003c\/h3\u003e\n\u003cp\u003eCompatibility covers many GM models across multiple years and engines; verify by cross-referencing your vehicle’s year, make, model and engine displacement with the provided fitment list. Also check the original part number—this kit replaces 635-518, 12633579 and 12639250. If you have any doubt, compare the existing cover’s bolt holes and external shape before purchase.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eFits Chevy, GMC, Cadillac, Buick, Pontiac, Saab, Hummer, Isuzu applications listed\u003c\/li\u003e\n  \u003cli\u003eReplaces OEM part numbers 635-518 \/ 12633579 \/ 12639250\u003c\/li\u003e\n  \u003cli\u003eCross-check vehicle year and engine size (4.8, 5.3, 6.0, 6.2L) for accurate fit\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat are the material and durability characteristics?\u003c\/h3\u003e\n\u003cp\u003eThe cover is machined from high-grade aluminum to mirror factory tolerances and deliver long-term resistance to rust and heat cycling. The gasket included is manufactured for a tight seal against oil and typical engine contaminants; bolts are supplied to secure the assembly to the block without additional hardware sourcing.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eHigh-quality aluminum body for corrosion resistance\u003c\/li\u003e\n  \u003cli\u003ePrecision-cut gasket for improved sealing performance\u003c\/li\u003e\n  \u003cli\u003eComplete bolt kit reduces installation delays\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eCan I install this myself or should a shop do it?\u003c\/h3\u003e\n\u003cp\u003eThis cover kit is designed for direct replacement and can be installed by a competent DIY mechanic with the right tools and experience removing the transmission or accessing the rear of the engine. Because replacing the rear main area often involves transmission removal and careful torqueing of fasteners, many users prefer a professional installation to ensure seal orientation and flange flatness are correct.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eDIY possible with transmission support and torque wrench\u003c\/li\u003e\n  \u003cli\u003eProfessional installation recommended if you lack experience\u003c\/li\u003e\n  \u003cli\u003eFollow manufacturer torque specs and use proper seal installation tools\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: This AUTOBABA Rear Main Seal Cover Kit is intended for owners and mechanics restoring oil-tight operation on GM V6 and V8 engines—particularly technicians working on Chevrolet Suburban, Silverado, Tahoe, Express, GMC Sierra\/Yukon, Cadillac Escalade and similar platforms. It suits drivers dealing with oil leaks from a damaged rear cover or shops wanting an OEM-dimension replacement that includes gasket and bolts in one package. Always confirm fitment with your vehicle’s year, engine code and original part number before ordering.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Does the kit include the rear main seal itself?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: This kit includes the aluminum cover, gasket and bolts; verify whether your application requires a separate rear main seal and install if worn.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Which part numbers does this replace?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: The AUTOBABA cover replaces OEM numbers 635-518, 12633579 and 12639250; always double-check fitment for your vehicle.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"AUTOBABA","offers":[{"title":"Default Title","offer_id":55168420577623,"sku":"B0CZLBB9GP","price":68.27,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1050\/1524\/7191\/files\/autobaba-rear-main-seal-cover-front-view.jpg?v=1790403493","url":"https:\/\/britishgarage.co.uk\/products\/autobaba-engine-rear-main-seal-cover-kit-for-gm-4-8-6-2l-trucks-suv-aluminum-gasket-bolts","provider":"British Garage","version":"1.0","type":"link"}