{"product_id":"dayco-87787-hvac-heater-hose","title":"Dayco 87787 HVAC Heater Hose - Heater To Pipe (Upper)","description":"\u003ch2\u003eDayco Small I.D. Heater Hose 87787\u003c\/h2\u003e\u003cp\u003eDayco 87787 is a Small I.D. Heater Hose built for HVAC heater hose service where a dual inside diameter is required. Made from EPDM with a black finish, it includes a protective sleeve and meets SAE J20R3 Class D-1 and SAE J1684 Type EC specifications for heater hose applications.\u003c\/p\u003e\u003cp\u003eThis Dayco heater hose is a direct-fit option for select Nissan Frontier and Nissan Xterra models with a heater-to-pipe upper routing. The dual I.D. design helps match the factory connection sizes, with a 5\/8-inch inside diameter on one end and a 3\/4-inch inside diameter on the other.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eBrand: Dayco Small I.D. Heater Hose\u003c\/li\u003e\n\u003cli\u003ePart number: 87787\u003c\/li\u003e\n\u003cli\u003eEPDM construction for heater hose service\u003c\/li\u003e\n\u003cli\u003eDual I.D. hose design: 5\/8 in. x 3\/4 in.\u003c\/li\u003e\n\u003cli\u003eBlack hose with protective sleeve\u003c\/li\u003e\n\u003cli\u003eMeets SAE J20R3 Class D-1 and SAE J1684 Type EC\u003c\/li\u003e\n\u003cli\u003eCompatible with heater-to-pipe upper routing on select Nissan applications\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eProduct Details\u003c\/h2\u003e\u003cp\u003eDayco 87787 is part of the Small I.D. Heater Hose line, a product line focused on heater hose routing that requires a smaller inside diameter and a dual-size connection. For Nissan Frontier and Nissan Xterra applications, this hose supports the upper heater-to-pipe connection and is built to match the dimensional needs of the original routing. The EPDM material is commonly used in coolant and heater hose service, while the protective sleeve adds an extra layer where the hose is exposed to underhood conditions.\u003c\/p\u003e\u003cp\u003eThis part cross-references Gates 18141 and NAPA 10141 for the same application.\u003c\/p\u003e\u003ch2\u003eVehicle Fitment\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eFits 1999-2004 Nissan Frontier, Heater To Pipe (Upper), Small I.D. Heater Hose\u003c\/li\u003e\n\u003cli\u003eFits 2000-2004 Nissan Xterra, Heater To Pipe (Upper), Small I.D. Heater Hose\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eCommon Replacement Reasons\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eCracked or hardened heater hose material\u003c\/li\u003e\n\u003cli\u003eCoolant seepage at the upper heater-to-pipe connection\u003c\/li\u003e\n\u003cli\u003eIncorrect hose size after prior repair work\u003c\/li\u003e\n\u003cli\u003eHeat-related hose wear in the engine bay\u003c\/li\u003e\n\u003cli\u003eLoss of heater circuit integrity on Nissan Frontier or Nissan Xterra models\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation Notes and Tips\u003c\/h2\u003e\u003cp\u003eVerify the 5\/8-inch and 3\/4-inch end sizes before installation and compare the routing to the original hose on the vehicle. Confirm the heater-to-pipe upper position on the Nissan Frontier or Nissan Xterra before removal, and inspect nearby clamps, pipes, and coolant connections for wear or corrosion. Proper hose routing and secure clamp placement help maintain a reliable seal.\u003c\/p\u003e\u003ch2\u003eQuality Assurance\u003c\/h2\u003e\u003cp\u003eDayco manufactures this heater hose to SAE J20R3 Class D-1 and SAE J1684 Type EC specifications, supporting consistent material and dimensional standards for HVAC hose replacement.\u003c\/p\u003e","brand":"Dayco","offers":[{"title":"Default Title","offer_id":43391561203893,"sku":"BCWL-87787","price":21.71,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/1442\/1173\/files\/DY_87787_Fro.jpg?v=1774728772","url":"https:\/\/www.partcatalog.com\/products\/dayco-87787-hvac-heater-hose","provider":"PartCatalog","version":"1.0","type":"link"}