{"product_id":"sierra-18-1213-forward-crankshaft-seal-timing-cover-seal-oem-26-11973-volvo-penta","title":"Sierra Timing Cover Seal 18-1213, Replaces 26-11973, Fits I\/L-6, V-6 4.3L, V-8 5.0L\/5.7L Marine Engines","description":"\u003cp\u003eThe Sierra 18-1213 is a timing cover seal engineered for marine sterndrive and inboard engines, sealing the timing cover against oil leakage where the front cover meets the engine block. It is built as a one-piece seal for standard rotation applications across a range of GM-based marine engine blocks, including 3.0L, 4.3L V-6, and 5.0L\/5.7L V-8 configurations, as well as inline six-cylinder engines. Because oil seals harden and shrink with age and heat cycling, the 18-1213 is a common preventive-maintenance and leak-repair replacement during timing cover service, front seal replacement, or engine rebuilds.\u003c\/p\u003e\u003cp\u003eFitment for the 18-1213 is tied to specific engine serial number breaks rather than a single universal application, so it covers 140\/3.0L and LX engines from serial number 6229718 and up, 150\/160\/165\/200 inline six-cylinder engines from serial number 1666495 and up (and again from 2770032 and up), 175\/185\/205\/262\/4.3L V-6 engines from serial number 6330183 and up, and 200 through 320 horsepower 5.0L\/5.7L\/898 V-8 engines from serial number 2453769 and up. It is also listed as the one-piece seal for standard-rotation 5.0L\/5.7L, 4.3L, and 3.0L applications. On several of these engine ranges, the 18-1213 is used alongside a companion seal, part number 18-1211, as part of the same timing cover service -- confirm your engine's serial number range to determine whether both seals are needed for your application.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Sierra\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e 18-1213\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Timing Cover Seal\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeal Configuration:\u003c\/strong\u003e One-piece seal, standard rotation\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM Cross Reference:\u003c\/strong\u003e 26-11973\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 808282242916\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.05 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Dimensions:\u003c\/strong\u003e 0.39 x 0.39 x 0.39 inches\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e140\/3.0L \u0026amp; LX: engine serial number 6229718 and up\u003c\/li\u003e\n\u003cli\u003e150\/160\/165\/200 (I\/L-6): engine serial number 1666495 and up\u003c\/li\u003e\n\u003cli\u003e150\/160\/165\/200 (I\/L-6): engine serial number 2770032 and up\u003c\/li\u003e\n\u003cli\u003e175\/185\/205\/262\/4.3L (V-6): engine serial number 6330183 and up\u003c\/li\u003e\n\u003cli\u003e200\/228\/225\/230\/250\/255\/260\/270\/280\/300\/320\/5.0L\/5.7L\/898 (V-8): engine serial number 2453769 and up\u003c\/li\u003e\n\u003cli\u003e5.0L\/5.7L, 4.3L, 3.0L standard rotation, all, one-piece seal application\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\u003cli\u003e26-11973\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat is the Sierra 18-1213 used for?\u003c\/strong\u003e The Sierra 18-1213 is a timing cover seal that seals the timing cover against oil leaks on marine sterndrive and inboard engines, and is typically replaced during timing cover service or when an engine develops a front oil leak.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat engines does the 18-1213 timing cover seal fit?\u003c\/strong\u003e It fits 140\/3.0L and LX engines from serial number 6229718 and up, 150\/160\/165\/200 inline six-cylinder engines from serial number 1666495 and up (and from 2770032 and up), 175\/185\/205\/262\/4.3L V-6 engines from serial number 6330183 and up, and 200 through 320 horsepower 5.0L\/5.7L\/898 V-8 engines from serial number 2453769 and up.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow do I know if the 18-1213 is the correct seal for my engine, or if I need 18-1211 too?\u003c\/strong\u003e Fitment for the 18-1213 depends on your engine's serial number range; on several of the listed engine ranges it is used together with a companion seal, part number 18-1211, as part of the same timing cover job, so check your engine's serial number to confirm whether both are required.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-1213 the same as OEM part 26-11973?\u003c\/strong\u003e The Sierra 18-1213 cross-references to OEM part number 26-11973, making it a direct aftermarket equivalent for that application.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat are the dimensions of the 18-1213 seal?\u003c\/strong\u003e The 18-1213 timing cover seal measures 0.39 x 0.39 x 0.39 inches.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the 18-1213 timing cover seal weigh?\u003c\/strong\u003e It weighs 0.05 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the 18-1213 a one-piece or two-piece seal?\u003c\/strong\u003e For standard-rotation 5.0L\/5.7L, 4.3L, and 3.0L applications, the 18-1213 is specified as a one-piece seal, simplifying installation compared to split-seal designs.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 18-1213 fit V-6 and V-8 marine engines?\u003c\/strong\u003e Yes, the 18-1213 covers 175\/185\/205\/262\/4.3L V-6 engines from serial number 6330183 and up, as well as 200 through 320 horsepower 5.0L\/5.7L\/898 V-8 engines from serial number 2453769 and up.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is included when I order the 18-1213?\u003c\/strong\u003e Ordering the 18-1213 provides one timing cover seal, part number 18-1213, for the engine serial number range and configuration that matches your application.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-1213 genuine Sierra or a generic aftermarket part?\u003c\/strong\u003e The 18-1213 is a genuine Sierra part, identified by manufacturer part number 18-1213, and cross-references directly to OEM part 26-11973.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy does fitment for the 18-1213 depend on engine serial numbers instead of model year?\u003c\/strong\u003e Timing cover seal changes on these marine engines were made at specific production points identified by engine serial number rather than by model year, so the 18-1213's coverage is defined by serial number breaks such as 6229718 and up or 2453769 and up.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988087189723,"sku":"SIE-18-1213","price":31.38,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-1213_lg__75351.1558121639.500.750.jpg?v=1785188308","url":"https:\/\/www.goodvibesmarina.com\/products\/sierra-18-1213-forward-crankshaft-seal-timing-cover-seal-oem-26-11973-volvo-penta","provider":"Good Vibes Marina","version":"1.0","type":"link"}