{"product_id":"sierra-18-2587-power-steering-cooler-for-mercruiser-replaces-oem-99356a2-6-tube-bundle","title":"Sierra 18-2587 Transmission Oil Cooler, Replaces Mercruiser 99356A2 Power Steering Cooler","description":"\u003cp\u003eThe Sierra 18-2587 is a replacement power steering and transmission oil cooler built for Mercruiser applications, directly replacing Mercruiser part number 99356A2. It is designed to dissipate heat from power steering fluid circulating through the system, with a rated capacity of 4 GPM maximum for power steering fluid and 25 GPM maximum for the raw water side that cools it.\u003c\/p\u003e\u003cp\u003eThe cooler features a 6 inch tube bundle with an overall length of 8 inches, and a water inlet and outlet sized at 1 1\/4 inches (31.8mm) to match standard hose fittings. It ships bare metal with a machined exterior finish, leaving it ready for the installer to apply primer and factory paint to match the surrounding engine components.\u003c\/p\u003e\u003cp\u003eThis cooler is intended as a direct fit replacement wherever the original Mercruiser 99356A2 power steering cooler is specified, making it a straightforward swap for a failed or corroded factory unit.\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 18-2587\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Transmission Oil Cooler \/ Power Steering Cooler\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReplaces (OEM):\u003c\/strong\u003e Mercruiser 99356A2\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWater Inlet\/Outlet:\u003c\/strong\u003e 1 1\/4 inches (31.8mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTube Bundle Length:\u003c\/strong\u003e 6 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length:\u003c\/strong\u003e 8 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePower Steering Fluid Flow Rate:\u003c\/strong\u003e 4 GPM maximum\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWater Flow Rate:\u003c\/strong\u003e 25 GPM maximum\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFinish:\u003c\/strong\u003e Bare metal, machined, ready for primer and factory paint\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 1.37 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 808282243630\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cp\u003eDesigned as a replacement power steering cooler for Mercruiser applications.\u003c\/p\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eMercruiser 99356A2\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat does the Sierra 18-2587 replace?\u003c\/strong\u003e The Sierra 18-2587 replaces the Mercruiser power steering cooler with OEM part number 99356A2, making it a direct swap for that factory part.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the overall length of this cooler?\u003c\/strong\u003e The Sierra 18-2587 has an overall length of 8 inches, built around a 6 inch tube bundle.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat size are the water inlet and outlet?\u003c\/strong\u003e The water inlet and outlet on the Sierra 18-2587 are sized at 1 1\/4 inches, or 31.8mm.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat flow rates is this cooler rated for?\u003c\/strong\u003e It is rated for a maximum of 4 GPM of power steering fluid and a maximum of 25 GPM of water flow on the cooling side.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the Sierra 18-2587 come painted?\u003c\/strong\u003e No, it ships bare metal with a machined exterior finish, ready for the installer to apply primer and factory paint to match the engine.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the Sierra 18-2587 weigh?\u003c\/strong\u003e The Sierra 18-2587 transmission oil cooler weighs 1.37 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs this a power steering cooler or a transmission cooler?\u003c\/strong\u003e It functions as a power steering cooler for Mercruiser applications, cooling power steering fluid using raw water flow through the tube bundle.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill this fit my Mercruiser?\u003c\/strong\u003e The Sierra 18-2587 is built as a replacement for the Mercruiser 99356A2 power steering cooler, so it fits wherever that original part is specified.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the UPC for this part?\u003c\/strong\u003e The UPC for the Sierra 18-2587 transmission oil cooler is 808282243630.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-2587 an OEM or aftermarket part?\u003c\/strong\u003e It is a Sierra-branded aftermarket replacement engineered to match the fit and function of the OEM Mercruiser 99356A2 power steering cooler.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988107374811,"sku":"SIE-18-2587","price":227.98,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/Untitled-1__29232.1753840674.500.750.jpg?v=1785188247","url":"https:\/\/www.goodvibesmarina.com\/products\/sierra-18-2587-power-steering-cooler-for-mercruiser-replaces-oem-99356a2-6-tube-bundle","provider":"Good Vibes Marina","version":"1.0","type":"link"}