{"product_id":"dayco-87856-hvac-heater-hose","title":"Dayco 87856 HVAC Heater Hose - Valve To Pipe","description":"\u003ch2\u003eOverview of Dayco Small I.D. Heater Hose 87856\u003c\/h2\u003e\u003cp\u003eThe Dayco Small I.D. Heater Hose 87856 is designed for reliable HVAC system performance in Geo and Toyota vehicles. Engineered with durable EPDM material, this hose supports efficient heating and coolant flow in models like the Toyota Corolla and Geo Prizm.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eConstructed from high-quality EPDM for heat and chemical resistance\u003c\/li\u003e\n\u003cli\u003eDual inside diameter hose with 5\/8 inch and 3\/4 inch ends for versatile fitment\u003c\/li\u003e\n\u003cli\u003eMeets 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\u003eTrunk height of 12 1\/2 inches for proper routing in HVAC systems\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eDayco Small I.D. Heater Hose Product Line Details\u003c\/h2\u003e\u003cp\u003eThe Small I.D. Heater Hose line by Dayco focuses on providing precise fit and durability for HVAC applications requiring smaller inside diameter hoses. This product line is tailored to meet specific OEM standards, ensuring compatibility and performance in vehicles like the Geo Prizm and Toyota Corolla. The 87856 part number represents a dual inside diameter hose designed to accommodate varying connection sizes within the heating system.\u003c\/p\u003e\u003ch2\u003eTechnical Description and Specifications\u003c\/h2\u003e\u003cp\u003eThis HVAC heater hose is made from EPDM, a synthetic rubber known for its resistance to heat, ozone, and coolant chemicals, making it suitable for automotive heating systems. The hose features two different inside diameters—5\/8 inch on one end and 3\/4 inch on the other—allowing it to connect components with differing sizes. It complies with SAE J20R3 Class D-1 and SAE J1684 Type EC standards, which specify requirements for coolant and heater hoses in automotive applications. The hose is black in color and does not include a heat shield or protective sleeve, which is typical for this type of heater hose. Its trunk height measures 12 1\/2 inches, ensuring proper fitment and routing within the vehicle's HVAC system.\u003c\/p\u003e\u003ch2\u003eCommon Applications and Problem Solving\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eReplacement of worn or cracked heater hoses in Geo Prizm and Toyota Corolla HVAC systems\u003c\/li\u003e\n\u003cli\u003eResolving coolant leaks that cause heating inefficiency or engine overheating\u003c\/li\u003e\n\u003cli\u003eAddressing hose swelling or softening due to chemical degradation\u003c\/li\u003e\n\u003cli\u003eFixing improper hose fitment issues caused by incorrect diameter hoses\u003c\/li\u003e\n\u003cli\u003eMaintaining proper coolant flow to the heater core for consistent cabin heating\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation Notes and Tips\u003c\/h2\u003e\u003cp\u003eWhen installing the Dayco Small I.D. Heater Hose 87856, ensure the correct orientation of the dual inside diameter ends to match the vehicle’s heater core and coolant line connections. Inspect hose clamps and replace if necessary to prevent leaks. Avoid twisting or kinking the hose during installation to maintain proper coolant flow. It is recommended to drain the cooling system before removal and refill with the appropriate coolant after installation. Verify that the hose routing does not interfere with moving parts or sharp edges.\u003c\/p\u003e\u003ch2\u003eQuality Assurance and Warranty\u003c\/h2\u003e\u003cp\u003eDayco manufactures the Small I.D. Heater Hose 87856 to meet stringent SAE specifications, ensuring durability and performance in automotive HVAC systems. While specific warranty details are not provided, Dayco products typically adhere to industry standards for quality and reliability. Using this hose helps maintain the integrity of the heating system in compatible Geo and Toyota models.\u003c\/p\u003e","brand":"Dayco","offers":[{"title":"Default Title","offer_id":43391564480693,"sku":"BCWL-87856","price":23.59,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/1442\/1173\/files\/DY_87856_Fro.jpg?v=1774728785","url":"https:\/\/www.partcatalog.com\/products\/dayco-87856-hvac-heater-hose","provider":"PartCatalog","version":"1.0","type":"link"}