{"product_id":"gates-21657-radiator-coolant-hose","title":"Gates 21657 Radiator Coolant Hose","description":"\u003ch2\u003eOverview of Gates Molded Coolant Hose 21657\u003c\/h2\u003e\u003cp\u003eThe Gates Molded Coolant Hose 21657 is designed specifically for select BMW models, including the 528i, 533i, 535i, 535is, 635CSi, 735i, 735iL, and 750iL. This radiator coolant hose is engineered to meet the precise specifications required for efficient engine cooling and durability.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eConstructed from durable EPDM material for heat and chemical resistance\u003c\/li\u003e\n\u003cli\u003eMolded design ensures precise fit and reliable sealing\u003c\/li\u003e\n\u003cli\u003eCenterline length of 152 mm (6 inches) for exact fitment\u003c\/li\u003e\n\u003cli\u003eConsistent inside diameter of 1.56 inches (40 mm) on both ends\u003c\/li\u003e\n\u003cli\u003eDoes not contain a spring or quick connect fittings\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eDetailed Product Description\u003c\/h2\u003e\u003cp\u003eThe Gates Molded Coolant Hose 21657 is manufactured from EPDM, a synthetic rubber known for its excellent resistance to heat, ozone, and coolant chemicals. This material choice helps maintain hose integrity under the demanding conditions of engine operation. The molded construction provides a precise shape that matches the original equipment specifications, ensuring a secure connection without leaks. Both ends of the hose have an inside diameter of 1.56 inches (40 mm), making it compatible with the corresponding radiator and engine fittings. With a centerline length of 152 mm (6 inches), this hose fits perfectly within the cooling system layout of the specified BMW models.\u003c\/p\u003e\u003ch2\u003eAbout the Molded Coolant Hose Product Line\u003c\/h2\u003e\u003cp\u003eThe Molded Coolant Hose line by Gates focuses on delivering hoses that are pre-formed to exact OEM shapes. This eliminates the need for bending or shaping during installation, reducing the risk of kinks or improper fit. The 21657 part benefits from this design approach, providing a reliable and consistent coolant flow path tailored for BMW vehicles.\u003c\/p\u003e\u003ch2\u003eCommon Applications and Problem Solving\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eReplacement of worn or cracked radiator coolant hoses\u003c\/li\u003e\n\u003cli\u003eResolving coolant leaks caused by hose degradation\u003c\/li\u003e\n\u003cli\u003eAddressing overheating issues due to compromised coolant flow\u003c\/li\u003e\n\u003cli\u003ePreventing coolant contamination from hose material breakdown\u003c\/li\u003e\n\u003cli\u003eMaintaining proper engine temperature regulation in BMW 528i, 533i, 535i, 535is, 635CSi, 735i, 735iL, and 750iL models\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation Notes and Tips\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eEnsure the engine is cool before removing the old hose to avoid burns\u003c\/li\u003e\n\u003cli\u003eInspect all clamps and fittings for wear and replace if necessary\u003c\/li\u003e\n\u003cli\u003eVerify the hose orientation matches the original to maintain proper coolant flow\u003c\/li\u003e\n\u003cli\u003eUse appropriate coolant compatible with EPDM hoses\u003c\/li\u003e\n\u003cli\u003eCheck for leaks after installation and during initial engine operation\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eQuality Assurance and Warranty\u003c\/h2\u003e\u003cp\u003eGates Molded Coolant Hose 21657 is manufactured to meet strict quality standards, ensuring durability and performance in demanding automotive environments. While specific warranty details are not provided here, Gates products typically come with manufacturer-backed warranties covering defects in materials and workmanship. Always refer to the product packaging or official Gates documentation for exact warranty terms.\u003c\/p\u003e","brand":"Gates","offers":[{"title":"Default Title","offer_id":45307250344117,"sku":"BBSC-21657","price":25.67,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/1442\/1173\/files\/ZO_21657_Fro.jpg?v=1775145990","url":"https:\/\/www.partcatalog.com\/products\/gates-21657-radiator-coolant-hose","provider":"PartCatalog","version":"1.0","type":"link"}