{"product_id":"circulating-water-pump-for-gm-v-6-small-block-v-8-inboard-engines-replaces-oem-20318-sierra-18-3599-2-gasket-included","title":"Sierra Circulating Water Pump 18-3599-2, Replaces 382218, for GM V-6 \u0026 Small Block V-8 Engines","description":"\u003cp\u003eThe Sierra Circulating Water Pump 18-3599-2 is a direct-fit replacement water pump built for GM V-6 and small block V-8 marine engines. It circulates raw or engine coolant through the block to keep operating temperatures in check, replacing worn or failing OEM pumps that no longer move sufficient coolant volume. Like all Sierra water pumps, the 18-3599-2 is bi-directional, so it operates correctly regardless of engine rotation, simplifying stocking and installation across compatible GM engine applications.\u003c\/p\u003e\u003cp\u003eThis pump ships with gasket 18-0981 included, so the mounting gasket does not need to be sourced separately at install time. It is designed to replace multiple OEM part numbers used across GM V-6 and small block V-8 engine production, making it a straightforward cross-reference for anyone repairing or rebuilding a marine engine cooling system. The pump carries UPC 808282374822 for easy identification when ordering or verifying the correct part.\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 18-3599-2\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Circulating Water Pump\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFitment:\u003c\/strong\u003e GM V-6 \u0026amp; small block V-8 engines\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRotation:\u003c\/strong\u003e Bi-directional\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIncluded Gasket:\u003c\/strong\u003e 18-0981 (included)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 10.34 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 808282374822\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eGM V-6 \u0026amp; small block V-8 engines\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e382218\u003c\/li\u003e\n\u003cli\u003e980477\u003c\/li\u003e\n\u003cli\u003e985429\u003c\/li\u003e\n\u003cli\u003e3853850\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat engines does the Sierra 18-3599-2 water pump fit?\u003c\/strong\u003e The Sierra 18-3599-2 circulating water pump is built for GM V-6 and small block V-8 engines.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the 18-3599-2 water pump direction-specific?\u003c\/strong\u003e No, the 18-3599-2 is bi-directional, meaning it functions correctly regardless of which way the engine rotates.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 18-3599-2 come with a gasket?\u003c\/strong\u003e Yes, gasket 18-0981 is included with the Sierra 18-3599-2 circulating water pump, so no separate gasket purchase is needed for installation.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat OEM part numbers does the Sierra 18-3599-2 replace?\u003c\/strong\u003e This pump replaces OEM numbers 382218, 980477, 985429, and 3853850.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the Sierra 18-3599-2 water pump weigh?\u003c\/strong\u003e The Sierra 18-3599-2 circulating water pump weighs 10.34 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the UPC for the Sierra 18-3599-2 water pump?\u003c\/strong\u003e The UPC for the Sierra 18-3599-2 is 808282374822.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan I use the 18-3599-2 as a direct swap for my original GM water pump?\u003c\/strong\u003e Yes, the 18-3599-2 is designed as a direct-fit replacement for GM V-6 and small block V-8 marine engines, cross-referencing to OEM numbers 382218, 980477, 985429, and 3853850.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat type of engine cooling system is the 18-3599-2 designed for?\u003c\/strong\u003e The 18-3599-2 is a circulating water pump used to move raw or engine coolant through the block of GM V-6 and small block V-8 marine engines.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the 18-3599-2 an aftermarket or OEM part?\u003c\/strong\u003e The 18-3599-2 is a Sierra-manufactured circulating water pump that serves as a replacement for the listed OEM part numbers rather than an original GM component.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is included when I order the Sierra 18-3599-2?\u003c\/strong\u003e The Sierra 18-3599-2 circulating water pump ships with gasket 18-0981 included.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988154495195,"sku":"SIE-18-3599-2","price":126.13,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/Untitled-1__72859.1756502363.500.750.jpg?v=1785188431","url":"https:\/\/www.goodvibesmarina.com\/products\/circulating-water-pump-for-gm-v-6-small-block-v-8-inboard-engines-replaces-oem-20318-sierra-18-3599-2-gasket-included","provider":"Good Vibes Marina","version":"1.0","type":"link"}