{"product_id":"gjysyp-oil-block-off-plugs-for-gm-lsx-lt-non-afm-engines-8-pack-stainless-steel-fits-4-8-6-2l-2008-2023","title":"GJYSYP Oil Block Off Plugs for GM LSX\/LT Non-AFM Engines — 8-Pack Stainless Steel, Fits 4.8–6.2L (2008–2023)","description":"\u003cp\u003e\u003cstrong\u003eGJYSYP oil block off plugs are precision-fit stainless steel seals designed to close AFM\/DOD oil passages on non-AFM GM LSX and LT series 4.8L–6.2L engines (2008–2023), supplied as an 8-pack for valley sealing.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThese valley seal plugs fit many LSX (LS1, LS2, LS3, LS7, etc.) and LT (LT1, LT4, LT5, etc.) non-AFM GM engines with displacements of 4.8, 5.3, 6.0, and 6.2 liters made between 2008 and 2023. Machined from stainless steel and finished with corrosion-resistant treatment, each plug installs by gently tapping into the oil passage so the head sits flush; the top contains a 4 mm x 0.7 threaded hole for straightforward removal if needed. The set includes eight plugs, enough to seal typical valley AFM\/DOD ports when converting or servicing engines.\u003c\/p\u003e\n\n\u003ch3\u003eHow do these plugs install into the engine valley?\u003c\/h3\u003e\n\u003cp\u003eInstallation is mechanical and requires no adhesive: align the plug with the AFM oil passage and gently tap it into place until the head sits flush with the bottom edge of the bung. For a tight fit that occasionally resists seating, chilling the plug (e.g., brief freezing) can reduce its diameter slightly and ease insertion. If removal is necessary, use a 4 mm x 0.7 threaded tool to back the plug out safely.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eTap-in installation—no sealant required under normal conditions\u003c\/li\u003e\n  \u003cli\u003eFlush-mounted head for a clean valley surface\u003c\/li\u003e\n  \u003cli\u003eTop threaded hole (4 mm x 0.7) for removal using a matching extractor\u003c\/li\u003e\n  \u003cli\u003eFreezing recommended if plug will not press-fit initially\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhich engines and displacements are these compatible with?\u003c\/h3\u003e\n\u003cp\u003eThese plugs are manufactured to fit non-AFM GM LSX and LT series engines from model years 2008–2023 and support common displacements including 4.8L, 5.3L, 6.0L, and 6.2L. They are intended to seal AFM\/DOD oil passages typically found under the valvetrain lifter oil manifold (VLOM) plate on non-AFM variants. Always verify port counts and bore size against your engine prior to purchase.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eFits LSX (LS1, LS2, LS3, LS7, etc.) non-AFM engines\u003c\/li\u003e\n  \u003cli\u003eFits LT series (LT1, LT4, LT5, etc.) non-AFM engines\u003c\/li\u003e\n  \u003cli\u003eSupports 4.8L, 5.3L, 6.0L, and 6.2L displacement configurations\u003c\/li\u003e\n  \u003cli\u003eSold as an 8-pack for typical valley sealing needs\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat materials and durability features do these plugs offer?\u003c\/h3\u003e\n\u003cp\u003eThe plugs are made from precision-machined stainless steel with an anti-corrosion surface treatment to resist environmental exposure inside the valley. Their tight tolerances are intended to maintain oil circuit integrity and provide a durable mechanical seal. GJYSYP performs quality inspections and backs the product with after-sales support for fitment or workmanship concerns.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eStainless steel core for strength and longevity\u003c\/li\u003e\n  \u003cli\u003eSurface anti-corrosion finish to reduce oxidation\u003c\/li\u003e\n  \u003cli\u003ePrecision machining for consistent press-fit sealing\u003c\/li\u003e\n  \u003cli\u003eManufacturer warranty and customer support from GJYSYP\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWill these plugs interfere with future service or reversibility?\u003c\/h3\u003e\n\u003cp\u003eNo permanent modification is required; plugs are removable through the supplied top threaded access and can be extracted using a compatible 4 mm x 0.7 threaded tool. That design lets you restore factory plumbing or perform maintenance without destructive removal. Always follow service procedures and torque\/cleaning guidelines when reassembling the valley area.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eRemovable via 4 mm x 0.7 threaded access hole\u003c\/li\u003e\n  \u003cli\u003eNon-permanent press-fit installation preserves cylinder block integrity\u003c\/li\u003e\n  \u003cli\u003eDesigned for serviceability and reversibility\u003c\/li\u003e\n  \u003cli\u003eRecommended inspection during future valve train work\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for? These GJYSYP oil block off plugs are aimed at mechanics, engine builders, and vehicle owners working on non-AFM GM LSX and LT series small-blocks who need a reliable way to seal AFM\/DOD oil passages in 4.8L–6.2L engines. They suit engine conversions, valley-plugging for durability or compatibility reasons, and shop technicians who want a removable, corrosion-resistant plug solution backed by manufacturer support.\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: Do these plugs fit AFM-equipped GM engines?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: No. They are designed for non-AFM GM LSX and LT series engines; confirm your engine is non-AFM before ordering.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: How do I remove a plug if I need to restore the original oil passages?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Use a 4 mm x 0.7 threaded extractor in the plug's top hole to back it out without damaging the block.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"GJYSYP","offers":[{"title":"Default Title","offer_id":48084377698462,"sku":"B0DS2XL2GX","price":30.5,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0781\/2041\/9486\/files\/gjysyp-front-packaging-oil-plugs.jpg?v=1785852452","url":"https:\/\/northtrailauto.ca\/products\/gjysyp-oil-block-off-plugs-for-gm-lsx-lt-non-afm-engines-8-pack-stainless-steel-fits-4-8-6-2l-2008-2023","provider":"North Trail Auto","version":"1.0","type":"link"}