{"product_id":"moroso-92-99-bmw-e36-96-02-z3-coolant-expansion-tank-direct-bolt-in-replacement","title":"Moroso Aluminum Coolant Expansion Tank for BMW E36 and Z3","description":"\u003ch4\u003eReplace a brittle plastic tank with pressure-tested aluminum\u003c\/h4\u003e\u003cp\u003eMoroso 63791 is a direct-fit aluminum coolant expansion tank for the supported BMW E36 and Z3 applications. It uses the factory mounting points and clip-on hose connection while replacing the failure-prone plastic body and threaded neck.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eMoroso 63791 is fabricated from aluminum\u003c\/li\u003e\n\u003cli\u003eDirect bolt-in design using factory mounting points\u003c\/li\u003e\n\u003cli\u003eAccepts the factory clip-on hose without cutting\u003c\/li\u003e\n\u003cli\u003eBillet aluminum filler neck\u003c\/li\u003e\n\u003cli\u003ePressure tested for leak-free operation\u003c\/li\u003e\n\u003cli\u003eIncludes a 24 psi radiator cap\u003c\/li\u003e\n\u003cli\u003eMade in the USA\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eFitment\u003c\/h4\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eYears\u003c\/th\u003e\n\u003cth\u003eMake\u003c\/th\u003e\n\u003cth\u003eChassis \/ Model\u003c\/th\u003e\n\u003cth\u003eVerified Notes\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e1992-1999\u003c\/td\u003e\n\u003ctd\u003eBMW\u003c\/td\u003e\n\u003ctd\u003eE36 3 Series\u003c\/td\u003e\n\u003ctd\u003eVerified six-cylinder applications include 323i, 325i, 328i, and M3 body variants listed by the retailer catalog.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e1996-2002\u003c\/td\u003e\n\u003ctd\u003eBMW\u003c\/td\u003e\n\u003ctd\u003eZ3\u003c\/td\u003e\n\u003ctd\u003eConfirm the factory two-piece expansion-tank layout and clip-on hose before installation.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003ch4\u003eSpecifications\u003c\/h4\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eDetail\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eManufacturer Part Number\u003c\/td\u003e\n\u003ctd\u003e63791\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct Type\u003c\/td\u003e\n\u003ctd\u003eCoolant expansion tank\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003eFabricated aluminum\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInstallation\u003c\/td\u003e\n\u003ctd\u003eDirect bolt-in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHose Connection\u003c\/td\u003e\n\u003ctd\u003eFactory clip-on style\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCap\u003c\/td\u003e\n\u003ctd\u003eMoroso 63324, 24 psi\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUPC\u003c\/td\u003e\n\u003ctd\u003e084663637919\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCountry of Origin\u003c\/td\u003e\n\u003ctd\u003eUSA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003ch4\u003eWhat's Included\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eOne Moroso 63791 aluminum expansion tank\u003c\/li\u003e\n\u003cli\u003eOne Moroso 63324 radiator cap\u003c\/li\u003e\n\u003cli\u003eIntegral mounting brackets and fittings shown with the exact tank\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eAbout Moroso\u003c\/h4\u003e\u003cp\u003eMoroso manufactures racing and performance fluid-control components in the United States. Its direct-fit expansion tanks replace application-specific factory plastic assemblies with welded aluminum while retaining the documented hose and mounting layout.\u003c\/p\u003e\u003ch4\u003eRelated Parts\u003c\/h4\u003e\u003cul\u003e\u003cli\u003eNo internal hose, thermostat, water pump, radiator, or coolant is linked because each companion part must be verified for the exact BMW chassis, engine, and cooling-system layout.\u003c\/li\u003e\u003c\/ul\u003e\u003ch4\u003eFAQ\u003c\/h4\u003e\u003cstrong\u003eWhat is the 63791?\u003c\/strong\u003e\u003cp\u003eIt is a direct-fit aluminum coolant expansion tank for the supported BMW E36 and Z3 cooling systems.\u003c\/p\u003e\u003cstrong\u003eIs a radiator cap included?\u003c\/strong\u003e\u003cp\u003eYes. The verified kit includes a 24 psi Moroso cap.\u003c\/p\u003e\u003cstrong\u003eDoes installation require cutting the factory hose?\u003c\/strong\u003e\u003cp\u003eNo. The tank accepts the matching factory clip-on hose connection.\u003c\/p\u003e\u003cstrong\u003eIs the tank plastic or aluminum?\u003c\/strong\u003e\u003cp\u003eIt is fabricated from aluminum with a billet aluminum filler neck.\u003c\/p\u003e\u003cstrong\u003eDoes it fit every E36?\u003c\/strong\u003e\u003cp\u003eNo. Confirm the supported six-cylinder application and the original tank, hose, and mounting layout before ordering.\u003c\/p\u003e\u003cstrong\u003eDoes it fit the Z3?\u003c\/strong\u003e\u003cp\u003eThe manufacturer lists 1996-2002 Z3 applications, subject to matching the factory cooling-system configuration.\u003c\/p\u003e\u003cstrong\u003eIs coolant included?\u003c\/strong\u003e\u003cp\u003eNo. Use only coolant mixed and specified for the exact BMW cooling system.\u003c\/p\u003e\u003cstrong\u003eWhat should be checked after installation?\u003c\/strong\u003e\u003cp\u003ePressure-test the system, bleed it with the BMW procedure, verify fan operation and coolant level, and inspect every connection for leaks.\u003c\/p\u003e\u003ch4\u003eInstallation Instructions\u003c\/h4\u003e\u003col\u003e\n\u003cli\u003eConfirm the BMW chassis, model year, engine, factory expansion-tank layout, and Moroso 63791 before draining coolant.\u003c\/li\u003e\n\u003cli\u003eAllow the engine to cool completely, relieve pressure safely, and capture coolant for proper disposal or reuse only if serviceable.\u003c\/li\u003e\n\u003cli\u003eDisconnect the level sensor and factory clip-on hose, then remove the original tank without damaging adjacent plastic fittings.\u003c\/li\u003e\n\u003cli\u003eInstall the aluminum tank at the factory mounting points and reconnect the verified hose and sensor without forcing either connection.\u003c\/li\u003e\n\u003cli\u003eFit the supplied cap, refill with the BMW-specified coolant mixture, and bleed the cooling system using the current service procedure.\u003c\/li\u003e\n\u003cli\u003ePressure-test the system, verify operating temperature and fan function, and recheck coolant level and every connection after the first complete heat cycle.\u003c\/li\u003e\n\u003c\/ol\u003e\u003cp\u003e\u003cstrong\u003eCalifornia Proposition 65 Warning:\u003c\/strong\u003e This product can expose you to chemicals including antimony oxide and other chemicals known to the State of California to cause cancer or reproductive harm. For more information, visit www.P65Warnings.ca.gov.\u003c\/p\u003e","brand":"Moroso","offers":[{"title":"Default Title","offer_id":68152525783119,"sku":"MOR63791","price":445.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1062\/7920\/files\/moroso-63791-bmw-aluminum-expansion-tank-01.webp?v=1794596317","url":"https:\/\/www.blackopsautoworks.com\/products\/moroso-92-99-bmw-e36-96-02-z3-coolant-expansion-tank-direct-bolt-in-replacement","provider":"Black Ops Auto Works","version":"1.0","type":"link"}