{"product_id":"general-motors®-12639250-ls-rear-block-cover","title":"General Motors® 12639250 LS Rear Block Cover","description":"\u003cp\u003e\u003cstrong\u003eGM part number 12639250 is a rear engine cover assembly (also known as a rear main seal housing) for General Motors LS-series V8 engines. It is used to seal the back of the engine block around the crankshaft to prevent oil leaks.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cdiv data-bfc=\"\" class=\"\" data-ved=\"2ahUKEwi0penjqt2VAxX7LEQIHf_-J8wQi4wTegoIAggACAAIDRAA\" data-copy-service-computed-style='font-family: \"Google Sans\", Roboto, Arial, sans-serif; font-size: 16px; font-weight: 400; margin: 0px; text-decoration: none; border-bottom: 0px rgb(230, 232, 240);'\u003e\n\u003cdiv class=\"n6owBd awi2gc\" data-sfc-cp=\"\" data-sfc-root=\"ep\" data-sfc-cb=\"\" data-hveid=\"CAIIAAgACA0QAQ\" data-complete=\"true\" data-copy-service-computed-style='font-family: \"Google Sans\", Roboto, Arial, sans-serif; font-size: 16px; font-weight: 400; margin: 12px 0px 16px; text-decoration: none; border-bottom: 0px rgb(230, 232, 240);'\u003e\u003cstrong\u003eThe GM 12639250 kit is a consolidated, factory-updated assembly designed to eliminate common issues with porosity and cracking found in earlier LS covers. \u003cbr\u003e\u003cbr\u003e\u003c!--TgQPHd||[]--\u003e\u003c\/strong\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv data-bfc=\"\" class=\"\" data-ved=\"2ahUKEwi0penjqt2VAxX7LEQIHf_-J8wQi4wTegoIAggACAAIDxAB\" data-copy-service-computed-style='font-family: \"Google Sans\", Roboto, Arial, sans-serif; font-size: 16px; font-weight: 400; margin: 0px; text-decoration: none; border-bottom: 0px rgb(230, 232, 240);'\u003e\u003cstrong\u003e\u003cspan class=\"T286Pc\" data-sfc-cp=\"\" data-sfc-root=\"ep\" data-sfc-cb=\"\" data-complete=\"true\" data-copy-service-computed-style='font-family: \"Google Sans\", Roboto, Arial, sans-serif; font-size: 16px; font-weight: 400; margin: 0px; text-decoration: none; border-bottom: 0px rgb(230, 232, 240);'\u003e\u003cspan class=\"Yjhzub\"\u003eComponent Type:\u003c!--TgQPHd||[]--\u003e\u003c\/span\u003e Rear Crankshaft Seal Housing \/ Rear Engine Cover\u003cbr\u003e\u003cbr\u003e\u003c!--TgQPHd||[]--\u003e\u003c\/span\u003e\u003c!--TgQPHd||[]--\u003e\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv data-bfc=\"\" class=\"\" data-ved=\"2ahUKEwi0penjqt2VAxX7LEQIHf_-J8wQi4wTegoIAggACAAIDxAD\" data-copy-service-computed-style='font-family: \"Google Sans\", Roboto, Arial, sans-serif; font-size: 16px; font-weight: 400; margin: 0px; text-decoration: none; border-bottom: 0px rgb(230, 232, 240);'\u003e\u003c\/div\u003e\n\u003cdiv data-bfc=\"\" class=\"\" data-ved=\"2ahUKEwi0penjqt2VAxX7LEQIHf_-J8wQi4wTegoIAggACAAIDxAF\" data-copy-service-computed-style='font-family: \"Google Sans\", Roboto, Arial, sans-serif; font-size: 16px; font-weight: 400; margin: 0px; text-decoration: none; border-bottom: 0px rgb(230, 232, 240);'\u003e\u003cstrong\u003e\u003cspan class=\"T286Pc\" data-sfc-cp=\"\" data-sfc-root=\"ep\" data-sfc-cb=\"\" data-complete=\"true\" data-copy-service-computed-style='font-family: \"Google Sans\", Roboto, Arial, sans-serif; font-size: 16px; font-weight: 400; margin: 0px; text-decoration: none; border-bottom: 0px rgb(230, 232, 240);'\u003e\u003cspan class=\"Yjhzub\"\u003eIncluded Hardware:\u003c!--TgQPHd||[]--\u003e\u003c\/span\u003e Pre-installed rear main seal, housing gasket, and mounting bolts\u003cbr\u003e\u003cbr\u003e\u003c!--TgQPHd||[]--\u003e\u003c\/span\u003e\u003c!--TgQPHd||[]--\u003e\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv data-bfc=\"\" class=\"\" data-ved=\"2ahUKEwi0penjqt2VAxX7LEQIHf_-J8wQi4wTegoIAggACAAIDxAH\" data-copy-service-computed-style='font-family: \"Google Sans\", Roboto, Arial, sans-serif; font-size: 16px; font-weight: 400; margin: 0px; text-decoration: none; border-bottom: 0px rgb(230, 232, 240);'\u003e\u003cstrong\u003e\u003cspan class=\"T286Pc\" data-sfc-cp=\"\" data-sfc-root=\"ep\" data-sfc-cb=\"\" data-complete=\"true\" data-copy-service-computed-style='font-family: \"Google Sans\", Roboto, Arial, sans-serif; font-size: 16px; font-weight: 400; margin: 0px; text-decoration: none; border-bottom: 0px rgb(230, 232, 240);'\u003e\u003cspan class=\"Yjhzub\"\u003eAlignment Tool:\u003c!--TgQPHd||[]--\u003e\u003c\/span\u003e Includes a plastic alignment sleeve to center the cover perfectly concentric to the crankshaft before final torquing\u003c!--TgQPHd||[]--\u003e\u003c\/span\u003e \u003cbr\u003e\u003cbr\u003e\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv data-bfc=\"\" class=\"\" data-ved=\"2ahUKEwi0penjqt2VAxX7LEQIHf_-J8wQi4wTegoIAggACAAIDxAH\" data-copy-service-computed-style='font-family: \"Google Sans\", Roboto, Arial, sans-serif; font-size: 16px; font-weight: 400; margin: 0px; text-decoration: none; border-bottom: 0px rgb(230, 232, 240);'\u003e\n\u003cdiv data-bfc=\"\" class=\"\" data-ved=\"2ahUKEwi0penjqt2VAxX7LEQIHf_-J8wQi4wTegoIAggACAAIFBAA\" data-copy-service-computed-style='font-family: \"Google Sans\", Roboto, Arial, sans-serif; font-size: 16px; font-weight: 400; margin: 0px; text-decoration: none; border-bottom: 0px rgb(230, 232, 240);'\u003e\n\u003cdiv class=\"n6owBd awi2gc\" data-sfc-cp=\"\" data-sfc-root=\"ep\" data-sfc-cb=\"\" data-hveid=\"CAIIAAgACBQQAQ\" data-complete=\"true\" data-copy-service-computed-style='font-family: \"Google Sans\", Roboto, Arial, sans-serif; font-size: 16px; font-weight: 400; margin: 12px 0px 16px; text-decoration: none; border-bottom: 0px rgb(230, 232, 240);'\u003e\u003cstrong\u003eThis part fits virtually all factory production Generation III and IV GM LS engine blocks (excluding aftermarket LSX blocks). This includes: \u003cbr\u003e\u003cbr\u003e\u003c!--TgQPHd||[]--\u003e\u003c\/strong\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv data-bfc=\"\" class=\"\" data-ved=\"2ahUKEwi0penjqt2VAxX7LEQIHf_-J8wQi4wTegoIAggACAAIFhAB\" data-copy-service-computed-style='font-family: \"Google Sans\", Roboto, Arial, sans-serif; font-size: 16px; font-weight: 400; margin: 0px; text-decoration: none; border-bottom: 0px rgb(230, 232, 240);'\u003e\u003cstrong\u003e\u003cspan class=\"T286Pc\" data-sfc-cp=\"\" data-sfc-root=\"ep\" data-sfc-cb=\"\" data-complete=\"true\" data-copy-service-computed-style='font-family: \"Google Sans\", Roboto, Arial, sans-serif; font-size: 16px; font-weight: 400; margin: 0px; text-decoration: none; border-bottom: 0px rgb(230, 232, 240);'\u003e\u003cspan class=\"Yjhzub\"\u003eEngine Sizes:\u003c!--TgQPHd||[]--\u003e\u003c\/span\u003e 4.8L, 5.3L, 5.7L (LS1\/LS6), 6.0L (LQ4\/LQ9\/LS2), 6.2L (LS3), and 7.0L (LS7)\u003cbr\u003e\u003cbr\u003e\u003c!--TgQPHd||[]--\u003e\u003c\/span\u003e\u003c!--TgQPHd||[]--\u003e\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv data-bfc=\"\" class=\"\" data-ved=\"2ahUKEwi0penjqt2VAxX7LEQIHf_-J8wQi4wTegoIAggACAAIFhAD\" data-copy-service-computed-style='font-family: \"Google Sans\", Roboto, Arial, sans-serif; font-size: 16px; font-weight: 400; margin: 0px; text-decoration: none; border-bottom: 0px rgb(230, 232, 240);'\u003e\n\u003cstrong\u003e\u003cspan class=\"T286Pc\" data-sfc-cp=\"\" data-sfc-root=\"ep\" data-sfc-cb=\"\" data-complete=\"true\" data-copy-service-computed-style='font-family: \"Google Sans\", Roboto, Arial, sans-serif; font-size: 16px; font-weight: 400; margin: 0px; text-decoration: none; border-bottom: 0px rgb(230, 232, 240);'\u003e\u003cspan class=\"Yjhzub\"\u003eApplications:\u003c!--TgQPHd||[]--\u003e\u003c\/span\u003e Commonly found in compatible Chevrolet, GMC, Cadillac, and Pontiac models (e.g., Silverado, Tahoe, Corvette, Camaro, GTO).\u003cbr\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003cbr\u003e\u003cstrong\u003e\u003c!--TgQPHd||[]--\u003e\u003c\/strong\u003e\n\u003c\/div\u003e\n\u003cdiv data-bfc=\"\" class=\"\" data-ved=\"2ahUKEwi0penjqt2VAxX7LEQIHf_-J8wQi4wTegoIAggACAAIFhAD\" data-copy-service-computed-style='font-family: \"Google Sans\", Roboto, Arial, sans-serif; font-size: 16px; font-weight: 400; margin: 0px; text-decoration: none; border-bottom: 0px rgb(230, 232, 240);'\u003e\n\u003cdiv data-bfc=\"\" class=\"\" data-ved=\"2ahUKEwi0penjqt2VAxX7LEQIHf_-J8wQi4wTegoIAggACAAIGRAB\" data-copy-service-computed-style='font-family: \"Google Sans\", Roboto, Arial, sans-serif; font-size: 16px; font-weight: 400; margin: 0px; text-decoration: none; border-bottom: 0px rgb(230, 232, 240);'\u003e\u003cstrong\u003e\u003cspan class=\"T286Pc\" data-sfc-cp=\"\" data-sfc-root=\"ep\" data-sfc-cb=\"\" data-complete=\"true\" data-copy-service-computed-style='font-family: \"Google Sans\", Roboto, Arial, sans-serif; font-size: 16px; font-weight: 400; margin: 0px; text-decoration: none; border-bottom: 0px rgb(230, 232, 240);'\u003e\u003cspan class=\"Yjhzub\"\u003eEngine Rebuilds:\u003c!--TgQPHd||[]--\u003e\u003c\/span\u003e A standard replacement part used during a complete teardown and rebuild of an LS engine.\u003c!--TgQPHd||[]--\u003e\u003c\/span\u003e\u003c!--TgQPHd||[]--\u003e\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv data-bfc=\"\" class=\"\" data-ved=\"2ahUKEwi0penjqt2VAxX7LEQIHf_-J8wQi4wTegoIAggACAAIGRAD\" data-copy-service-computed-style='font-family: \"Google Sans\", Roboto, Arial, sans-serif; font-size: 16px; font-weight: 400; margin: 0px; text-decoration: none; border-bottom: 0px rgb(230, 232, 240);'\u003e\u003cstrong\u003e\u003cspan class=\"T286Pc\" data-sfc-cp=\"\" data-sfc-root=\"ep\" data-sfc-cb=\"\" data-complete=\"true\" data-copy-service-computed-style='font-family: \"Google Sans\", Roboto, Arial, sans-serif; font-size: 16px; font-weight: 400; margin: 0px; text-decoration: none; border-bottom: 0px rgb(230, 232, 240);'\u003e\u003cspan class=\"Yjhzub\"\u003e\u003cbr\u003eRear Main Seal Service:\u003c!--TgQPHd||[]--\u003e\u003c\/span\u003e Technicians often replace the entire cover assembly during a rear main seal replacement to avoid issues with older, warped, or leaking factory covers\u003c\/span\u003e\u003c\/strong\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"General Motors®","offers":[{"title":"Default Title","offer_id":43024726392926,"sku":"12639250","price":79.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0030\/5315\/8515\/files\/1_634e4b22-f0b9-4b67-bce2-ca7f957de6a7.jpg?v=1784415898","url":"https:\/\/10secondracing.com\/products\/general-motors%c2%ae-12639250-ls-rear-block-cover","provider":"10 Second Racing","version":"1.0","type":"link"}