{"product_id":"sierra-18-70945-molded-cooling-hose-for-mercruiser-4-3l-gen-1998-2007-replaces-oem-32-862139","title":"Sierra 18-70945 Molded Hose, Thermostat Housing to Port Manifold, Replaces 32-862139, Fits Mercruiser 4.3L (Gen+) 1998-07","description":"\u003cp\u003eThe Sierra 18-70945 is a molded coolant hose engineered to connect the thermostat housing to the port manifold on Mercruiser stern drive engines equipped with a two-piece exhaust manifold. Rather than a generic length of tubing that has to be trimmed and clamped into a rough approximation of the original routing, this hose is molded to the factory bend and connection points, so it seats correctly against the thermostat housing and port manifold fittings without kinking or requiring extra hardware to hold its shape under engine heat and vibration.\u003c\/p\u003e\u003cp\u003eIt is built from glass (glass-reinforced) hose material in white, giving it the heat resistance and structural rigidity needed to handle the closed cooling system's flow between the thermostat housing and the port manifold. Sierra designs this hose to meet or exceed the performance of the original equipment part it replaces, and each package contains one hose. It directly replaces Mercruiser stern drive part 32-862139 and is intended for Mercruiser 4.3L (Gen+), 4.3L EFI (Gen+), and 4.3LH (Gen+) engines that use a two-piece exhaust manifold configuration. Because this hose is specific to the thermostat-housing-to-port-manifold routing, confirm your engine's manifold configuration and engine designation before ordering to make sure it matches 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 18-70945\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Molded Hose\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApplication:\u003c\/strong\u003e Thermostat Housing to Port Manifold\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eExhaust Manifold Configuration:\u003c\/strong\u003e Two-Piece Exhaust Manifold\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Glass\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eColor:\u003c\/strong\u003e White\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.68 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePackage Quantity:\u003c\/strong\u003e 1 hose\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 808282265595\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eMercruiser 4.3L (Gen+) (1998-07)\u003c\/li\u003e\n\u003cli\u003eMercruiser 4.3L EFI (Gen+) (1998-01)\u003c\/li\u003e\n\u003cli\u003eMercruiser 4.3LH (Gen+) (1998-02)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\u003cli\u003e32-862139\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat does the Sierra 18-70945 hose connect?\u003c\/strong\u003e It connects the thermostat housing to the port manifold on applicable Mercruiser stern drive engines, and is molded specifically for engines with a two-piece exhaust manifold.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat OEM part does the 18-70945 replace?\u003c\/strong\u003e It replaces Mercruiser stern drive part number 32-862139.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhich engines is this hose designed for?\u003c\/strong\u003e The Sierra 18-70945 fits Mercruiser 4.3L (Gen+) (1998-07), 4.3L EFI (Gen+) (1998-01), and 4.3LH (Gen+) (1998-02) engines with a two-piece exhaust manifold.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the 18-70945 hose side-specific?\u003c\/strong\u003e Yes, this hose routes to the port manifold; it is not a universal port-or-starboard fitting.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat material is the hose made from?\u003c\/strong\u003e The 18-70945 is made from glass (glass-reinforced) hose material in white, chosen for heat resistance in the closed cooling system.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow many hoses come in a package?\u003c\/strong\u003e Each package of the Sierra 18-70945 includes one molded hose.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat color is the Sierra 18-70945 hose?\u003c\/strong\u003e It is white.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the 18-70945 weigh?\u003c\/strong\u003e The hose weighs 0.68 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes this hose fit engines with a one-piece exhaust manifold?\u003c\/strong\u003e The 18-70945 is specified for engines with a two-piece exhaust manifold configuration on the listed 4.3L (Gen+), 4.3L EFI (Gen+), and 4.3LH (Gen+) engines.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the 18-70945 a genuine Sierra part or generic aftermarket?\u003c\/strong\u003e It is a genuine Sierra part, molded to meet or exceed the performance of the original equipment hose it replaces (32-862139).\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 18-70945 fit 4.3L EFI models?\u003c\/strong\u003e Yes, it is designed for 4.3L EFI (Gen+) (1998-01) engines in addition to 4.3L (Gen+) and 4.3LH (Gen+) applications.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow is 18-70945 different from Sierra's other similar molded hoses, like 18-70953?\u003c\/strong\u003e The 18-70945 routes the thermostat housing to the port manifold on 4.3L-family engines, while 18-70953 is a separate part number for a seawater pump to oil cooler application on different engine fitments, so make sure you are ordering the part number matching your specific connection point.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988363194587,"sku":"SIE-18-70945","price":48.95,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-70945_lg__77555.1558130888.500.750.jpg?v=1785188251","url":"https:\/\/www.goodvibesmarina.com\/products\/sierra-18-70945-molded-cooling-hose-for-mercruiser-4-3l-gen-1998-2007-replaces-oem-32-862139","provider":"Good Vibes Marina","version":"1.0","type":"link"}