{"product_id":"82-180-thermostat-3335550-4973373-for-cummins-isx-qsx-4318197-engine","title":"82℃ 180℉ Thermostat 3335550 4973373 for Cummins ISX QSX 4318197 Engine","description":"\u003ch2\u003eThermostat for Cummins ISX QSX\u003c\/h2\u003e\u003cp\u003eThis 82℃ (180℉) thermostat regulates engine coolant temperature for Cummins ISX and QSX engines, matching OEM reference numbers 3335550, 4973373, and 4318197. It opens at the rated temperature to maintain optimal operating conditions and prevent overheating.\u003c\/p\u003e\u003ch4\u003eOverview\u003c\/h4\u003e\u003cp\u003eThis thermostat is a direct replacement for Cummins heavy-duty engines, controlling coolant flow to keep the engine within its ideal temperature window. It fits Cummins ISX and QSX series, ensuring consistent thermal management under load. With a precise opening point of 82℃ or 180℉, it supports reliable cold starts and efficient high-temperature operation.\u003c\/p\u003e\u003ch4\u003eBuilt For Performance\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eOpens at 82℃ (180℉) for precise temperature control\u003c\/li\u003e\n\u003cli\u003eDurable wax-pellet element provides consistent response\u003c\/li\u003e\n\u003cli\u003eStainless steel frame resists corrosion in coolant systems\u003c\/li\u003e\n\u003cli\u003eRubber seal ensures leak-free seating in the housing\u003c\/li\u003e\n\u003cli\u003eDirect replacement for OEM 3335550, 4973373, 4318197\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eFits These Machines\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003efor Cummins ISX engines\u003c\/li\u003e\n\u003cli\u003efor Cummins QSX engines\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eOn-The-Job Use\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eReplaces a stuck-open or stuck-closed thermostat during cooling system service\u003c\/li\u003e\n\u003cli\u003eSupports highway trucking, construction, and agricultural applications\u003c\/li\u003e\n\u003cli\u003eEnsures proper warm-up in cold climates for ISX and QSX engines\u003c\/li\u003e\n\u003cli\u003eUsed at scheduled maintenance intervals for severe-duty fleets\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eSpecs At A Glance\u003c\/h4\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOpening Temperature\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e82℃ \/ 180℉\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePart Number(s)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e3335550, 4973373, 4318197\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch4\u003eGood To Know\u003c\/h4\u003e\u003cp\u003e\u003cstrong\u003eQ:\u003c\/strong\u003e Is this thermostat a direct OEM replacement? \u003cstrong\u003eA:\u003c\/strong\u003e Yes, it matches the 3335550, 4973373, and 4318197 cross-reference numbers, designed to fit Cummins ISX and QSX engine cooling systems.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eQ:\u003c\/strong\u003e What happens if my thermostat is stuck closed? \u003cstrong\u003eA:\u003c\/strong\u003e A stuck-closed thermostat can cause the engine to overheat quickly, since coolant cannot pass to the radiator. Replacing it with this unit restores proper heat dissipation.\u003c\/p\u003e\u003cp\u003e\u003cem\u003eSlight variation in finish or dimensions may occur between production runs, and fit can depend on serial number, so confirm compatibility before ordering.\u003c\/em\u003e\u003c\/p\u003e","brand":"Solid Spare","offers":[{"title":"Default Title","offer_id":45562747519062,"sku":"ZZ3F03291","price":48.39,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0697\/8460\/0662\/files\/s-l1600_1aaa8e35-bc74-4916-8568-9180e0b009d8.jpg?v=1789252622","url":"https:\/\/www.solidspare.com\/products\/82-180-thermostat-3335550-4973373-for-cummins-isx-qsx-4318197-engine","provider":"Solid Spare","version":"1.0","type":"link"}