{"product_id":"dayco-87978-hvac-heater-hose","title":"Dayco 87978 HVAC Heater Hose - Heater (Upper)","description":"\u003ch2\u003eOverview of Dayco Small I.D. Heater Hose 87978\u003c\/h2\u003e\u003cp\u003eThe Dayco Small I.D. Heater Hose 87978 is designed for reliable HVAC system performance in Ford and Mazda trucks. This branched heater hose is engineered to meet specific fitment requirements for Ford Ranger and Mazda B3000 models, ensuring proper coolant flow and heater function.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eConstructed from durable EPDM material for heat and chemical resistance\u003c\/li\u003e\n\u003cli\u003eBranched hose design with three different inside diameters (5\/8\" and 1\/4\")\u003c\/li\u003e\n\u003cli\u003eComplies with SAE J20R3 Class D-1 and SAE J1684 Type EC specifications\u003c\/li\u003e\n\u003cli\u003eBlack color for standard OEM appearance\u003c\/li\u003e\n\u003cli\u003eCompatible with Ford Ranger and Mazda B3000 HVAC systems\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eDetailed Product Description\u003c\/h2\u003e\u003cp\u003eThe Dayco Small I.D. Heater Hose 87978 is a branched hose made from EPDM, a synthetic rubber known for its excellent resistance to heat, ozone, and automotive fluids. This hose features three ends with inside diameters of 5\/8\" for End 1 and End 2, and 1\/4\" for End 3, allowing it to connect multiple HVAC components efficiently. The outside diameters are 15\/16\" for the larger ends and 17\/32\" for the smaller end, ensuring a secure fit with OEM connectors. The hose does not include a heat shield or protective sleeve, which is typical for this type of HVAC heater hose. With a trunk height of 26, it fits precisely within the engine bay layout of the specified vehicles.\u003c\/p\u003e\u003cp\u003eThe Small I.D. Heater Hose product line by Dayco focuses on delivering hoses with smaller inside diameters tailored for HVAC heater core connections. This line is engineered to meet stringent SAE standards, providing reliable performance in heating and cooling systems for light trucks and SUVs.\u003c\/p\u003e\u003ch2\u003eApplications and Common Issues Addressed\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eReplacement of cracked or leaking heater hoses in Ford Ranger and Mazda B3000 HVAC systems\u003c\/li\u003e\n\u003cli\u003eRestoring proper coolant flow to the heater core for effective cabin heating\u003c\/li\u003e\n\u003cli\u003eResolving overheating issues caused by faulty or deteriorated heater hoses\u003c\/li\u003e\n\u003cli\u003ePreventing coolant leaks that can lead to engine damage or HVAC failure\u003c\/li\u003e\n\u003cli\u003eMaintaining OEM fit and function in HVAC hose assemblies\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation Notes and Tips\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eEnsure the vehicle is cool before removing the old heater hose to avoid burns\u003c\/li\u003e\n\u003cli\u003eVerify hose end diameters match the OEM connectors on your Ford Ranger or Mazda B3000\u003c\/li\u003e\n\u003cli\u003eUse proper clamps to secure the hose ends and prevent leaks\u003c\/li\u003e\n\u003cli\u003eInspect surrounding components for wear or damage during installation\u003c\/li\u003e\n\u003cli\u003eFlush the cooling system if necessary to remove debris before installing the new hose\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eQuality Assurance and Warranty\u003c\/h2\u003e\u003cp\u003eDayco manufactures the Small I.D. Heater Hose 87978 to meet SAE J20R3 Class D-1 and SAE J1684 Type EC standards, ensuring durability and compatibility with specified vehicle HVAC systems. The EPDM material provides resistance to heat and automotive fluids, contributing to long service life. Warranty details are subject to Dayco's standard policies and should be confirmed at the time of purchase.\u003c\/p\u003e","brand":"Dayco","offers":[{"title":"Default Title","offer_id":43391568773301,"sku":"BCWL-87978","price":47.07,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/1442\/1173\/files\/DY_87978_Fro.jpg?v=1774728801","url":"https:\/\/www.partcatalog.com\/products\/dayco-87978-hvac-heater-hose","provider":"PartCatalog","version":"1.0","type":"link"}