Dayco 87801 HVAC Heater Hose

Dayco Small I.D. Heater Hose 87801

Dayco Small I.D. Heater Hose 87801 is a black EPDM HVAC heater hose built for small inside diameter coolant routing in heater circuits. It uses a single I.D. hose design with a protective sleeve and 5/8 in. inside diameter at both ends for direct replacement in the listed applications.

Key Features

• EPDM construction for heater hose service
• Black finish for a clean OE-style appearance
• 5/8 in. inside diameter at both ends
• Single I.D. hose design
• Protective sleeve included; heat shield not included
• Built to SAE J20R3 Class D-1 and SAE J1684 Type EC specifications

Product Details

Dayco’s Small I.D. Heater Hose line is focused on replacement hose for heater-to-engine and heater outlet routing where a consistent small-diameter connection is required. Part number 87801 is specified for applications including Ford Explorer and Mercury Mountaineer heater-to-outlet routing, Mazda 626 heater outlet routing, Mazda Millenia heater-to-engine routing, and Ford Probe heater-to-pipe-2 routing. This part cross-references Ford (e.g., 1L2Z-18482-VA) for the same application.

For buyers searching for a Dayco 87801 heater hose, this part is a direct-fit style option for select Ford, Mercury, and Mazda vehicles. It is also a practical match for searches such as 2002-2005 Ford Explorer heater hose, 2002-2005 Mercury Mountaineer heater hose, and 1995-2002 Mazda Millenia heater hose replacement.

What It Is Used For

• Replacing a worn or cracked heater hose in the coolant circuit
• Restoring heater flow between the engine, outlet, or pipe connection
• Addressing coolant seepage at a small I.D. hose connection
• Replacing a hose that has softened, hardened, or split from heat exposure
• Servicing heater hose routing on Ford Explorer, Mercury Mountaineer, Mazda 626, Mazda Millenia, and Ford Probe applications

Installation Notes and Tips

Verify the hose routing and end diameters before installation. Match the vehicle position exactly as listed: Fits 2002-2005 Ford Explorer, Heater To Outlet; Fits 2002-2005 Mercury Mountaineer, Heater To Outlet; Fits 1998-2002 Mazda 626, Heater Outlet; Fits 1995-2002 Mazda Millenia, Heater To Engine; Fits 1993-1997 Ford Probe, Heater To Pipe-2. Inspect adjoining fittings, clamps, and coolant condition before installing the new hose.

Quality Assurance

Dayco manufactures this heater hose to SAE J20R3 Class D-1 and SAE J1684 Type EC specifications for defined heater hose performance requirements. The EPDM hose material and protective sleeve support use in the listed HVAC heater hose applications.