Dayco 87723 HVAC Heater Hose

Dayco Small I.D. Heater Hose 87723

Dayco 87723 is a Small I.D. Heater Hose built for HVAC heater hose service where a 5/8 in. inside diameter is required at both ends. Made from EPDM and finished in black, it is specified for heater circuit routing in applications such as Honda Accord, Mazda MX-3, and Lincoln LS.

Key Features

• EPDM construction for heater hose service
• 5/8 in. inside diameter at End 1 and End 2
• Single I.D. hose design for small-diameter heater routing
• Black finish for a clean OE-style appearance
• Meets SAE J20R3 Class D-1 and SAE J1684 Type EC specifications
• Dayco Small I.D. Heater Hose line for HVAC hose replacement needs

Product Details

Dayco 87723 is part of the Small I.D. Heater Hose product line, which focuses on heater hose routing where compact diameter and consistent coolant flow are required. This HVAC heater hose uses EPDM rubber and a single I.D. hose construction to serve heater-to-valve, heater-to-thermostat, tee-to-cooler, and valve-to-pipe routing found in select import and domestic applications. It is a direct service part for vehicles including 1994-1997 Honda Accord, 1995 Mazda MX-3, and 2000-2003 Lincoln LS.

This part cross-references Gates 18734 for the same application.

Common Uses

• Replacing a cracked or hardened heater hose
• Restoring coolant flow through the heater circuit
• Addressing leaks at heater valve, pipe, or tee connections
• Correcting hose deterioration from heat and age
• Servicing small I.D. heater hose routing on Honda Accord, Mazda MX-3, and Lincoln LS applications

Installation Notes

Verify the 5/8 in. inside diameter at both ends before installation and match the hose routing to the original heater circuit layout. Confirm the position listed for your vehicle, such as heater to valve, heater to thermostat, tee to cooler, or valve to pipe, before replacing the original hose. Inspect adjoining clamps, pipes, valves, and fittings for wear or corrosion so the new hose seals properly.

Quality Assurance

Dayco 87723 is manufactured to SAE J20R3 Class D-1 and SAE J1684 Type EC specifications for heater hose service. The EPDM construction supports use in coolant and HVAC heater hose applications where standard small-diameter hose performance is required.