{"product_id":"gates-molded-coolant-hose-21216-oe-style-pre-formed-epdm-replacement-for-radiator-heater-lines","title":"Gates Molded Coolant Hose 21216 - OE-Style Pre-Formed EPDM Replacement for Radiator \u0026 Heater Lines","description":"\u003cp\u003e\u003cstrong\u003eThe Gates 21216 is a ready-to-install molded coolant hose built to replace upper, lower, bypass and heater hose applications with OE-level fit and durable EPDM construction.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eIf you need a direct-replacement radiator or coolant hose without visiting an original-equipment dealer, this molded Gates hose gives you a pre-formed, reinforced option engineered for modern cooling systems. It’s part of Gates’ broad molded coolant hose lineup, designed to match factory shapes and routing so clamps and flanges seal correctly and installation is faster. Materials and reinforcement are chosen to withstand vacuum, heat, ozone and the chemical action of modern engine coolants.\u003c\/p\u003e\n\n\u003ch3\u003eHow does this hose fit my vehicle and save installation time?\u003c\/h3\u003e\n\u003cp\u003eThe 21216 comes pre-shaped to the contours and routing of the intended OE application so you don’t need to bend or trim it. That saves fitting time and reduces the chance of leaks or pinch points. Its replacement geometry keeps clamps aligned and mating surfaces flush for a reliable seal.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003ePre-formed shape for precise OE-style routing\u003c\/li\u003e\n  \u003cli\u003eDirect-replacement dimensions to match factory joints\u003c\/li\u003e\n  \u003cli\u003eReduces fitting adjustments and installation rework\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat materials and construction make this hose durable?\u003c\/h3\u003e\n\u003cp\u003eThe hose uses an EPDM inner tube and an EPDM outer cover with synthetic fiber knit reinforcement between them, a combination that resists the common failure modes in coolant systems. The compound and reinforcement limit collapse under vacuum and resist electrochemical degradation that often shortens hose life.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eEPDM tube and cover for heat, ozone and coolant resistance\u003c\/li\u003e\n  \u003cli\u003eSynthetic fiber knit reinforcement for pressure and shape retention\u003c\/li\u003e\n  \u003cli\u003eMaterials engineered to resist vacuum collapse and internal degradation\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eDoes this hose meet industry performance standards?\u003c\/h3\u003e\n\u003cp\u003eGates designed the 21216 to meet relevant SAE and DIN criteria for molded coolant hoses, ensuring consistent physical and chemical properties across production. While tolerances can vary, the hose aligns with SAE 20R4 class D2 and DIN 73411 class A requirements, providing confidence for most replacement applications.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eManufactured to SAE 20R4 class D2 specifications\u003c\/li\u003e\n  \u003cli\u003eMeets DIN 73411 class A requirements (except tolerances)\u003c\/li\u003e\n  \u003cli\u003eQuality control to ensure dimension and material consistency\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow does the 21216 resist common failure causes in coolant hoses?\u003c\/h3\u003e\n\u003cp\u003eThe hose is formulated and reinforced to fight the main mechanisms that lead to premature failures, such as electrochemical breakdown and vacuum-induced collapse. The result is a longer service interval and more reliable performance under varied engine operating conditions.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eCompounds reduce electrochemical degradation from coolant chemistry\u003c\/li\u003e\n  \u003cli\u003eReinforcement prevents wall collapse during vacuum events\u003c\/li\u003e\n  \u003cli\u003eOuter EPDM resists ozone and heat cracking for extended life\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: The Gates 21216 molded coolant hose is aimed at DIY mechanics, independent shops and fleet technicians who want a factory-fit replacement without the dealer markup. It suits any repair or maintenance task that requires a pre-shaped, OE-equivalent coolant hose built for modern engine coolant formulations and demanding operating conditions.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Will this hose fit my car’s upper radiator connection?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: The 21216 is a pre-shaped OE-style replacement; verify cross-reference or vehicle application to confirm fit.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: What materials resist coolant and heat in this hose?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: It uses EPDM inner and outer layers with synthetic fiber knit reinforcement for coolant, heat, and ozone resistance.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"Gates","offers":[{"title":"Default Title","offer_id":55165740089687,"sku":"B000C2UAYM","price":58.23,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1050\/1524\/7191\/files\/gates-21216-front-profile-cutaway.jpg?v=1790357652","url":"https:\/\/britishgarage.co.uk\/products\/gates-molded-coolant-hose-21216-oe-style-pre-formed-epdm-replacement-for-radiator-heater-lines","provider":"British Garage","version":"1.0","type":"link"}