{"product_id":"dayco-87666-hvac-heater-hose","title":"Dayco 87666 HVAC Heater Hose","description":"\u003ch2\u003eOverview\u003c\/h2\u003e\u003cp\u003eDayco 87666 is a small I.D. HVAC heater hose built for coolant transfer in heater circuits that require a 5\/8-inch inside diameter at both ends. It uses EPDM construction and meets SAE J20R3 Class D-1 and SAE J1684 Type EC specifications for heater hose applications.\u003c\/p\u003e\u003cp\u003eCompatible with a range of vehicles including Cadillac CTS, Ford Econoline applications, and Chrysler minivan heater circuits, this hose is a fitment-based replacement for specific auxiliary heater and heater outlet routing. Dayco 87666 is also referenced by interchange part numbers used for the same application.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eEPDM rubber construction for heater hose service.\u003c\/li\u003e\n\u003cli\u003e5\/8-inch inside diameter at both ends for small I.D. routing.\u003c\/li\u003e\n\u003cli\u003eSingle I.D. hose design for straightforward coolant flow paths.\u003c\/li\u003e\n\u003cli\u003eBuilt to SAE J20R3 Class D-1 and SAE J1684 Type EC standards.\u003c\/li\u003e\n\u003cli\u003eBlack finish for a clean underhood appearance.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eDetailed Description\u003c\/h2\u003e\u003cp\u003eDayco 87666 is a small I.D. heater hose intended for specific HVAC coolant routing where a 5\/8-inch hose is required. The EPDM material is commonly used in cooling-system hose construction, and the SAE specifications identify the hose as suitable for heater hose service. This part number is used across multiple fitments, including Cadillac CTS heater outlet routing, Ford E-Series auxiliary heater connections, and Chrysler minivan pipe-to-pipe applications. If you are sourcing a Dayco 87666 replacement for a Ford E-150 Econoline, Ford E-250 Econoline, or Cadillac CTS, verify the position and notes against the vehicle listing before installation.\u003c\/p\u003e\u003ch2\u003eWhat It Helps Address\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eCracked or aged heater hose material.\u003c\/li\u003e\n\u003cli\u003eIncorrect hose diameter for heater circuit routing.\u003c\/li\u003e\n\u003cli\u003eCoolant transfer issues in auxiliary heater lines.\u003c\/li\u003e\n\u003cli\u003eReplacement needs for pipe-to-pipe or heater-to-tee routing.\u003c\/li\u003e\n\u003cli\u003eService work on vehicles with small I.D. heater hose requirements.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation Notes\u003c\/h2\u003e\u003cp\u003eConfirm the hose path, end diameter, and fitment notes before installation. This part is listed for specific heater outlet, heater-to-tee, pipe-to-pipe, and carburetor-to-engine applications, so matching the vehicle routing is important. Use the vehicle’s service information to verify the correct hose length and routing before replacing the original hose.\u003c\/p\u003e\u003ch2\u003eQuality Assurance\u003c\/h2\u003e\u003cp\u003eDayco 87666 is manufactured to SAE J20R3 Class D-1 and SAE J1684 Type EC standards for heater hose applications. This part cross-references Monroe Shocks \u0026amp; Struts (e.g., 172286, 182286) for the same application.\u003c\/p\u003e","brand":"Dayco","offers":[{"title":"Default Title","offer_id":53497246154933,"sku":"BCWL-87666","price":24.34,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/1442\/1173\/files\/DY_87666_Fro.jpg?v=1791522219","url":"https:\/\/www.partcatalog.com\/products\/dayco-87666-hvac-heater-hose","provider":"PartCatalog","version":"1.0","type":"link"}