{"product_id":"sierra-18-70955-molded-cooling-hose-for-mercruiser-4-3l-v6-replaces-oem-32-16012-oil-cooler-to-thermostat-housing","title":"Sierra 18-70955 Molded Hose, Oil Cooler to Thermostat Housing for MC175\/205 \u0026 4.3L MerCruiser","description":"\u003cp\u003eThe Sierra 18-70955 is a molded cooling system hose engineered to connect the oil cooler to the thermostat housing on applicable MerCruiser engines. It is designed for thermostat housings that have all four hose connectors cast directly into the housing itself, with no separate \"T\" connector required. In this configuration, two hoses run to the manifold and two hoses run to the elbow, and the 18-70955 is molded to complete that oil cooler to thermostat housing connection with a precise, correct-fit bend rather than a straight length that has to be forced into shape.\u003c\/p\u003e\u003cp\u003eSierra molds this hose for fresh water or raw water cooling systems, shaping it to maintain full, unrestricted water flow through the bend while also simplifying installation compared to a generic straight hose. Construction uses EPDM tubing with a synthetic knit reinforcement, giving the hose the flexibility and heat resistance needed for engine bay cooling circuits. It is finished in white and built to OEM quality standards, so fit, form, and function match the original equipment it replaces. This hose is intended for the specific MerCruiser engines and model years listed below; confirm your engine designation before ordering.\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 18-70955\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Molded Hose\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFunction:\u003c\/strong\u003e Oil cooler to thermostat housing connection\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThermostat Housing Configuration:\u003c\/strong\u003e All four hose connectors cast into the housing (no \"T\" connector)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHose Routing:\u003c\/strong\u003e Two hoses to manifold and two hoses to elbow\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e EPDM tubing with synthetic knit reinforcement\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 0.37 pounds\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eMC175\/205 (1987)\u003c\/li\u003e\n\u003cli\u003e4.3L (1988-92)\u003c\/li\u003e\n\u003cli\u003e4.3L (Gen II) (1992-95)\u003c\/li\u003e\n\u003cli\u003e4.3LX (Gen II) (1992-95)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat does the Sierra 18-70955 hose connect?\u003c\/strong\u003e The 18-70955 is a molded hose that connects the oil cooler to the thermostat housing, on housings where all four hose connectors are cast into the housing itself with no separate T connector.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhich engines is the 18-70955 designed for?\u003c\/strong\u003e This hose fits the MC175\/205 (1987), 4.3L (1988-92), 4.3L (Gen II) (1992-95), and 4.3LX (Gen II) (1992-95) MerCruiser engines.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs this hose a straight length I have to bend myself?\u003c\/strong\u003e No, the Sierra 18-70955 is molded into the correct shape for the oil cooler to thermostat housing routing, so it fits the bend without being forced into place like a generic straight hose.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat material is the 18-70955 hose made from?\u003c\/strong\u003e It is built from EPDM tubing with a synthetic knit reinforcement, a construction suited to the heat and flexing found in a marine engine cooling circuit.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat color is the Sierra 18-70955?\u003c\/strong\u003e The hose is white.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the 18-70955 hose weigh?\u003c\/strong\u003e It weighs 0.37 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow many hoses come with the 18-70955, and how do they route?\u003c\/strong\u003e The 18-70955 is used in a configuration with two hoses to the manifold and two hoses to the elbow, connecting the oil cooler to the thermostat housing.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the 18-70955 compatible with a thermostat housing that uses a separate T connector?\u003c\/strong\u003e No, this molded hose is designed for thermostat housings with all four hose connectors cast into the housing itself, not housings that use a separate T connector.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 18-70955 work for both fresh water and raw water cooling systems?\u003c\/strong\u003e Yes, Sierra molds this hose for use in either fresh water or raw water cooling systems on the applicable MerCruiser engines.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-70955 built to OEM quality?\u003c\/strong\u003e Yes, Sierra designs the 18-70955 to OEM quality standards so it matches the original hose in fit, form, and function.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill the 18-70955 fit a 5.0L or 5.7L MerCruiser engine?\u003c\/strong\u003e No, the 18-70955 is fitted to the MC175\/205, 4.3L, and 4.3LX engines listed; other MerCruiser V8 engines use a different Sierra part number.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988363686107,"sku":"SIE-18-70955","price":35.8,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-70955_lg__58685.1706560936.500.750.jpg?v=1785188657","url":"https:\/\/www.goodvibesmarina.com\/products\/sierra-18-70955-molded-cooling-hose-for-mercruiser-4-3l-v6-replaces-oem-32-16012-oil-cooler-to-thermostat-housing","provider":"Good Vibes Marina","version":"1.0","type":"link"}