{"product_id":"water-pump-impeller-for-crusader-5-7l-6-0l-serpentine-belt-engines-replaces-rp061022-sierra-18-8926","title":"Sierra Impeller 18-8926, Replaces 20300, For GM Engines with V-Belt Water Pumps","description":"\u003cp\u003eThe Sierra Impeller 18-8926 is a replacement water pump impeller engineered for GM engines equipped with V-belt driven water pumps. As the impeller wears, spins loose in its housing, or loses vane flexibility, cooling water flow drops and engine temperatures rise, so keeping a correctly sized replacement on hand is a routine part of marine engine maintenance. The 18-8926 is molded from plastic for consistent vane geometry and directly replaces OEM part number 20300, making it a straightforward drop-in swap during routine water pump service or a rebuild.\u003c\/p\u003e\u003cp\u003eSierra impellers are manufactured to match OEM sizing and vane profile so the replacement seats and seals correctly in the original pump housing without modification. Because raw water impellers are a wear item, most engine builders recommend replacing the impeller on a set service interval or any time the water pump is opened for inspection, rather than waiting for a failure at the dock.\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 18-8926\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Plastic\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.38 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUnit Count:\u003c\/strong\u003e 1\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 808282316013\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGTIN:\u003c\/strong\u003e 00808282316013\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReplaces (OEM):\u003c\/strong\u003e 20300\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFitment:\u003c\/strong\u003e GM engines with V-belt driven water pumps\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eGM engines with V-belt driven water pumps\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\u003cli\u003e20300\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat does the Sierra 18-8926 impeller replace?\u003c\/strong\u003e The Sierra 18-8926 directly replaces OEM part number 20300, so it is a straight cross-reference swap for that original impeller.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat engines is the 18-8926 impeller designed for?\u003c\/strong\u003e It is designed for GM engines equipped with V-belt driven water pumps.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat material is the 18-8926 impeller made from?\u003c\/strong\u003e It is molded from plastic, formulated for durability and consistent vane flexibility in raw water cooling service.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the 18-8926 impeller weigh?\u003c\/strong\u003e The Sierra 18-8926 impeller weighs 0.38 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow many impellers come in the package?\u003c\/strong\u003e The 18-8926 is sold as a single unit, one impeller per package.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-8926 an OEM part or an aftermarket replacement?\u003c\/strong\u003e It is an aftermarket replacement impeller manufactured by Sierra to replace OEM number 20300.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhen should I replace the impeller on a GM V-belt water pump?\u003c\/strong\u003e Impellers are a wear item, so the 18-8926 should be installed any time the vanes show cracking, chunking, or loss of flexibility, or as part of routine water pump service.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill the 18-8926 fit a serpentine belt driven water pump?\u003c\/strong\u003e The 18-8926 is specified for GM engines with V-belt driven water pumps, not serpentine belt applications.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the UPC for the Sierra 18-8926 impeller?\u003c\/strong\u003e The UPC for the Sierra 18-8926 impeller is 808282316013.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 18-8926 impeller include a gasket or housing?\u003c\/strong\u003e The 18-8926 is the impeller only; it does not include a pump gasket or housing.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988435677403,"sku":"SIE-18-8926","price":46.7,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-8926__56765.1558186769.500.750.jpg?v=1785188403","url":"https:\/\/www.goodvibesmarina.com\/products\/water-pump-impeller-for-crusader-5-7l-6-0l-serpentine-belt-engines-replaces-rp061022-sierra-18-8926","provider":"Good Vibes Marina","version":"1.0","type":"link"}