{"product_id":"dayco-72991-radiator-coolant-hose-lower","title":"Dayco 72991 Radiator Coolant Hose - Lower","description":"\u003ch2\u003eOverview of Dayco Curved Radiator Hose 72991\u003c\/h2\u003e\u003cp\u003eThe Dayco Curved Radiator Hose 72991 is engineered for reliable coolant flow in select Infiniti models. Designed with durable EPDM material, this black radiator coolant hose ensures consistent performance under typical engine operating conditions.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eConstructed from EPDM for heat and chemical resistance\u003c\/li\u003e\n\u003cli\u003eBlack color with a curved design for precise fitment\u003c\/li\u003e\n\u003cli\u003eInside diameter of 1 5\/16 inches on both ends\u003c\/li\u003e\n\u003cli\u003eOutside diameter of 1 3\/4 inches on both ends\u003c\/li\u003e\n\u003cli\u003eMeets SAE J20R4 Class D-1 and SAE J1684 Type EC specifications\u003c\/li\u003e\n\u003cli\u003eSingle inside diameter hose without heat shield or protective sleeve\u003c\/li\u003e\n\u003cli\u003eTrunk height dimension of 19 inches\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eDetailed Product Description\u003c\/h2\u003e\u003cp\u003eThis Dayco Curved Radiator Hose 72991 is specifically designed to maintain optimal coolant circulation in Infiniti FX35, FX37, M35h, M37, Q70, Q70L, and QX70 vehicles. The hose is made from EPDM (ethylene propylene diene monomer), a synthetic rubber known for its resistance to heat, ozone, and coolant chemicals, which helps extend the hose's service life. Both ends of the hose have an inside diameter of 1 5\/16 inches and an outside diameter of 1 3\/4 inches, ensuring a secure and leak-free connection to the radiator and engine fittings. This single inside diameter hose complies with SAE J20R4 Class D-1 and SAE J1684 Type EC standards, confirming its suitability for automotive coolant systems.\u003c\/p\u003e\u003ch2\u003eAbout the Curved Radiator Hose Product Line\u003c\/h2\u003e\u003cp\u003eThe Dayco Curved Radiator Hose line focuses on providing hoses with precise bends and dimensions to fit specific vehicle cooling systems. This product line is designed to replace original equipment hoses that require a curved shape for proper routing and clearance within the engine bay. The 72991 part number is part of this line, offering a tailored fit for various Infiniti models to maintain efficient coolant flow and system integrity.\u003c\/p\u003e\u003ch2\u003eCommon Applications and Problem Solving\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eReplacement for cracked or leaking radiator coolant hoses\u003c\/li\u003e\n\u003cli\u003eRestores proper coolant flow in Infiniti FX35, FX37, M35h, M37, Q70, Q70L, and QX70\u003c\/li\u003e\n\u003cli\u003ePrevents overheating caused by compromised hoses\u003c\/li\u003e\n\u003cli\u003eAddresses hose swelling or softening due to age or heat exposure\u003c\/li\u003e\n\u003cli\u003eEnsures compatibility with factory cooling system specifications\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation Notes and Tips\u003c\/h2\u003e\u003cp\u003eWhen installing the Dayco Curved Radiator Hose 72991, ensure the engine is cool to avoid burns from hot coolant. Verify that the hose dimensions match the original equipment to prevent leaks. Use appropriate clamps to secure both ends of the hose firmly. Inspect adjacent components for wear or damage during installation to maintain overall cooling system health.\u003c\/p\u003e\u003ch2\u003eQuality Assurance and Warranty\u003c\/h2\u003e\u003cp\u003eDayco manufactures the Curved Radiator Hose 72991 to meet SAE specifications, ensuring compliance with industry standards for durability and performance. While specific warranty details are not provided, Dayco products typically undergo rigorous quality control to support reliable operation in automotive cooling systems.\u003c\/p\u003e","brand":"Dayco","offers":[{"title":"Default Title","offer_id":51995903164597,"sku":"BCWL-72991","price":41.33,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/1442\/1173\/files\/DY_72991_Fro.jpg?v=1775164833","url":"https:\/\/www.partcatalog.com\/products\/dayco-72991-radiator-coolant-hose-lower","provider":"PartCatalog","version":"1.0","type":"link"}