{"product_id":"dayco-87770-hvac-heater-hose","title":"Dayco 87770 HVAC Heater Hose - Heater Inlet or Thermostat To Heater","description":"\u003ch2\u003eOverview of Dayco Small I.D. Heater Hose 87770\u003c\/h2\u003e\u003cp\u003eThe Dayco Small I.D. Heater Hose 87770 is designed for reliable HVAC system performance in select Chevrolet, Ford, GMC, and Mercury vehicles. Engineered with durable EPDM material, this dual inside diameter hose ensures proper coolant flow and heat transfer for your vehicle's heating system.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eConstructed from high-quality EPDM for heat and chemical resistance\u003c\/li\u003e\n\u003cli\u003eDual inside diameters: 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 14 inches for precise installation\u003c\/li\u003e\n\u003cli\u003eCompatible with Chevrolet Silverado 2500 HD, Silverado 3500, GMC Sierra 2500 HD, Sierra 3500, Ford Escort, and Mercury Tracer\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eAbout the Small I.D. Heater Hose Product Line\u003c\/h2\u003e\u003cp\u003eThe Dayco Small I.D. Heater Hose product line focuses on providing HVAC heater hoses with dual inside diameters to accommodate specific vehicle applications. This line is engineered to meet stringent SAE standards, ensuring durability and proper fitment in heating systems. The 87770 part number is part of this line, offering a reliable replacement hose for various domestic trucks and passenger cars.\u003c\/p\u003e\u003ch2\u003eDetailed Product Description\u003c\/h2\u003e\u003cp\u003eThe Dayco 87770 heater hose is manufactured from EPDM, a synthetic rubber known for its excellent resistance to heat, ozone, and automotive fluids. This hose features a dual inside diameter design, with one end measuring 5\/8 inch and the other 3\/4 inch, allowing it to connect different HVAC components securely. It does not include a heat shield or protective sleeve, which is typical for this hose type. The hose complies with SAE J20R3 Class D-1 and SAE J1684 Type EC standards, confirming its suitability for automotive heating and cooling systems. Its black color matches OEM specifications, and the 14-inch trunk height supports proper routing within the engine bay.\u003c\/p\u003e\u003ch2\u003eApplications and Common Issues Addressed\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eReplacement of cracked or leaking heater hoses in Chevrolet Silverado 2500 HD and 3500 models\u003c\/li\u003e\n\u003cli\u003eRestoring proper coolant flow in GMC Sierra 2500 HD and 3500 heating systems\u003c\/li\u003e\n\u003cli\u003eFixing heater hose failures in Ford Escort and Mercury Tracer HVAC units\u003c\/li\u003e\n\u003cli\u003eResolving overheating or insufficient cabin heat due to damaged hoses\u003c\/li\u003e\n\u003cli\u003ePreventing coolant leaks that can cause engine damage or HVAC malfunctions\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation Notes and Tips\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eVerify hose diameters (5\/8 inch and 3\/4 inch) match your vehicle’s heater core and water outlet connections\u003c\/li\u003e\n\u003cli\u003eEnsure clamps are properly tightened to prevent leaks without damaging the hose\u003c\/li\u003e\n\u003cli\u003eInspect surrounding components for wear or damage during installation\u003c\/li\u003e\n\u003cli\u003eReplace hoses when the engine is cool to avoid burns or injury\u003c\/li\u003e\n\u003cli\u003eCheck for proper routing to avoid kinks or contact with hot engine parts\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eQuality Assurance and Warranty\u003c\/h2\u003e\u003cp\u003eDayco manufactures the Small I.D. Heater Hose 87770 to meet SAE specifications, ensuring consistent quality and performance. While specific warranty details are not provided, Dayco products typically come with manufacturer-backed warranties covering defects in materials and workmanship. Using this hose helps maintain the integrity of your vehicle’s HVAC system and supports reliable operation.\u003c\/p\u003e","brand":"Dayco","offers":[{"title":"Default Title","offer_id":43391558746293,"sku":"BCWL-87770","price":14.17,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/1442\/1173\/files\/DY_87770_Fro.jpg?v=1774728768","url":"https:\/\/www.partcatalog.com\/products\/dayco-87770-hvac-heater-hose","provider":"PartCatalog","version":"1.0","type":"link"}