Dayco 87650 HVAC Heater Hose

Dayco Small I.D. Heater Hose 87650

Dayco 87650 is a Small I.D. Heater Hose built for HVAC heater circuit service where a 5/8 in. inside diameter is required at both ends. Made from EPDM and finished in black, this heater hose is specified to SAE J20R3 Class D-1 and SAE J1684 Type EC standards for common underhood coolant routing.

Use this Dayco Small I.D. Heater Hose when servicing heater outlet, heater inlet, heater to tee, heater to pipe, heater to valve, pipe to engine, heater to thermostat, tee to water pump, or pipe to pipe connections on supported applications. This part number 87650 is listed for a wide range of vehicles, including Hyundai Elantra, Toyota Sienna, Ford Aspire, and Oldsmobile Intrigue applications.

Key Features

• EPDM construction for heater hose service
• 5/8 in. inside diameter at both ends
• Single I.D. hose design for small-diameter heater routing
• Black finish for a factory-style appearance
• Built to SAE J20R3 Class D-1 and SAE J1684 Type EC specifications
• Dayco 87650 Small I.D. Heater Hose for HVAC hose replacement

Product Details

The Dayco Small I.D. Heater Hose brand line is focused on heater circuit hose applications that require a consistent small inside diameter and reliable coolant flow. This hose uses EPDM rubber, a common material for automotive heater hose service, and is listed without a heat shield or protective sleeve. The 87650 part number is used across multiple makes and models, including Hyundai Elantra heater outlet applications, Toyota Sienna engine to tee routing, and Ford Aspire heater outlet service.

This part cross-references Gates 18773 for the same application. It also cross-references NAPA 10773 for the same application.

Common Problems This Hose Can Address

• Cracked or hardened heater hose at the heater outlet
• Coolant seepage at small-diameter heater hose connections
• Restricted heater flow from deteriorated hose material
• Soft spots, swelling, or splitting in the heater circuit
• Service replacement for aging heater inlet, tee, or valve routing

Installation Notes and Tips

Verify the required 5/8 in. inside diameter before installation and match the hose routing to the vehicle’s heater circuit position. Confirm the application by year, make, model, and connection point, since this hose is listed for multiple positions including heater outlet, heater inlet, heater to tee, heater to pipe, heater to valve, pipe to engine, heater to thermostat, tee to water pump, and pipe to pipe.

For fitment examples, this part fits 2001-2006 Hyundai Elantra, heater outlet; 2004-2006 Toyota Sienna, engine to tee; 1995-1997 Ford Aspire, heater outlet; and 1999-2002 Oldsmobile Intrigue, heater inlet. Additional listed applications include 1992-1994 Chrysler LeBaron, heater to valve; 1991 Ford E-150 Econoline, pipe to engine; and 1988 Ford F-150, tee to water pump.

Quality Assurance

Dayco manufactures this heater hose to SAE J20R3 Class D-1 and SAE J1684 Type EC specifications, supporting consistent material and dimensional requirements for HVAC hose service.