{"product_id":"sierra-18-7879-1-oil-filter-gm-chevy-v6","title":"Sierra 18-7879-1 Oil Filter – GM\/Chevy V6","description":"\u003csection class=\"product-description\"\u003e\n\n\u003ch2\u003eSierra 18-7879-1 Oil Filter – GM\/Chevy V6\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003ePart Number:\u003c\/strong\u003e 18-7879-1  |  \u003cstrong\u003eSKU:\u003c\/strong\u003e 47-78791  |  \u003cstrong\u003eUPC:\u003c\/strong\u003e 808282359829\u003c\/p\u003e\n\n\u003cp\u003eThe Sierra 18-7879-1 is a marine spin-on oil filter designed for GM\/Chevy V6 marine engines, including compatible MerCruiser, OMC, and Volvo Penta inboard and sterndrive applications. It uses an 18 mm x 1.5 metric thread — the key differentiator from other Sierra GM marine filters — along with high-efficiency filter media, an anti-drain-back valve, and an epoxy-coated heavy-wall steel canister for corrosion resistance in marine environments.\u003c\/p\u003e\n\n\u003ch2\u003eKey Specifications\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eThread: 18 mm x 1.5 (metric)\u003c\/li\u003e\n\u003cli\u003eHeight: approximately 3.46 in.\u003c\/li\u003e\n\u003cli\u003eAnti-drain-back valve: Yes\u003c\/li\u003e\n\u003cli\u003eCanister: Heavy-wall epoxy-coated steel\u003c\/li\u003e\n\u003cli\u003eFilter media: High-efficiency, meets or exceeds OEM specification\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eCompatible Applications\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eGM\/Chevy 3.8L V6 marine inboard engines in MerCruiser, OMC, and Volvo Penta installations\u003c\/li\u003e\n\u003cli\u003eGM\/Chevy 4.3L V6 marine inboard and sterndrive engines in MerCruiser, OMC, and Volvo Penta installations\u003c\/li\u003e\n\u003cli\u003eOther GM V6 marine applications using a direct-mount 18 mm x 1.5 threaded oil filter\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cem\u003e\u003cstrong\u003eFitment Note:\u003c\/strong\u003e Confirm your engine model, serial number, and existing oil filter part number before ordering. Some GM V6 marine engines use a remote oil-filter arrangement that requires a different filter. The 18 mm x 1.5 thread is specific to the GM V6 family — do not confuse with the 13\/16\"-16 thread used on GM V8 marine applications.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003ch2\u003eService Interval\u003c\/h2\u003e\n\u003cp\u003eReplace at every engine oil change. Follow the engine manufacturer’s recommended service interval — typically every 100 hours of operation or once per season, whichever comes first.\u003c\/p\u003e\n\n\u003ch2\u003eInstallation Notes\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eRemove the old filter and confirm the old gasket has come away with it — a retained gasket will cause an oil leak\u003c\/li\u003e\n\u003cli\u003eClean the filter mounting surface\u003c\/li\u003e\n\u003cli\u003eLightly coat the new filter gasket with fresh engine oil before threading it on\u003c\/li\u003e\n\u003cli\u003eTighten by hand plus ¾ turn, or per engine manufacturer specification — do not over-tighten\u003c\/li\u003e\n\u003cli\u003eRun the engine and inspect for leaks before returning to service\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eOEM \u0026amp; Cross-Reference Part Numbers\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSierra:\u003c\/strong\u003e 18-7879-1\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMerCruiser:\u003c\/strong\u003e 35-802884, 35-802884Q, 35-802884T, 35-883702K, 41815\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQuicksilver:\u003c\/strong\u003e 35-883702Q\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOMC:\u003c\/strong\u003e 173834, 502903\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVolvo Penta:\u003c\/strong\u003e 841750\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChrysler:\u003c\/strong\u003e L-319\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMallory:\u003c\/strong\u003e 9-57803\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEMP:\u003c\/strong\u003e 35-57803\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWix:\u003c\/strong\u003e 51036\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFram:\u003c\/strong\u003e PH3980\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eRelated Products\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/sierra-18-7876-1-oil-filter-gm-chevy-long\"\u003eSierra 18-7876-1 Oil Filter – GM\/Chevy Long\u003c\/a\u003e — long-style 13\/16\"-16 GM V8 marine filter\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/sierra-78242-oil-filter-gm-chev-short-47-78242\"\u003eSierra 78242 Oil Filter – GM\/Chev Short\u003c\/a\u003e — short-style GM marine filter\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/sierra-18-7878-1-oil-filter-ford-chrysler-volvo-short\"\u003eSierra 18-7878-1 Oil Filter – Ford\/Chrysler\/Volvo Short\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/sierra-18-7824-2-marine-oil-filter-gm-mercruiser-volvo-penta-omc-crusader-indmar\"\u003eSierra 18-7824-2 Marine Oil Filter – GM MerCruiser, Volvo Penta, OMC, Crusader \u0026amp; Indmar\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/sierra-oil-drain-kit-1-2-20-thread-42-length-47-7891\"\u003eSierra Oil Drain Kit – 1\/2\"-20 Thread, 42\" Length (47-7891)\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eParts Desk Insights\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eBest Use Case:\u003c\/strong\u003e Routine oil and filter changes on GM\/Chevy V6-powered MerCruiser, OMC, and Volvo Penta marine engines. The 3.8L and 4.3L GM V6 is one of the most common sterndrive engine families, and this is its direct-mount filter. It’s a frequently reordered maintenance part — customers with 4.3L MerCruiser packages will encounter this filter regularly.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCommon Issues:\u003c\/strong\u003e The most common fitment mistake is confusing this 18 mm x 1.5 metric-thread filter with the 13\/16\"-16 threaded filters used on GM V8 marine engines. If a customer is unsure, the fastest confirmation is to match MerCruiser 35-802884, OMC 173834, or Volvo Penta 841750 against what’s on their engine. Also remind customers to check whether their engine uses a direct-mount or remote filter arrangement — V6 engines with remote mounts use a different filter entirely.\u003c\/p\u003e\n\n\u003c\/section\u003e","brand":"LNS","offers":[{"title":"Default Title","offer_id":51199650234404,"sku":"47-78791","price":16.79,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0743\/5799\/7604\/files\/47-78791.jpg?v=1785611156","url":"https:\/\/marisolmarine.com\/products\/sierra-18-7879-1-oil-filter-gm-chevy-v6","provider":"Marisol Marine Company","version":"1.0","type":"link"}