Dayco 87890 HVAC Heater Hose - Heater To Pipe-1 or Heater To Water Pump

Dayco Small I.D. Heater Hose for Ford Applications

Dayco 87890 is a small inside diameter HVAC heater hose built for heater circuit service in select Ford trucks and vans. Made from EPDM and finished in black, it uses a 5/8 in. inside diameter at both ends for a direct replacement in the specified heater-to-pipe and heater-to-water-pump locations.

Key Features

• EPDM construction for heater hose service
• 5/8 in. inside diameter at both ends
• Single I.D. hose design
• Black finish for 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

Product Details

This Dayco Small I.D. Heater Hose is built for Ford heater hose routing where a 5/8 in. hose is required. The EPDM rubber construction is suited for coolant transfer in HVAC heater circuits, while the single I.D. hose layout supports straightforward routing in the factory-style application. Dayco 87890 is listed for select Ford E-150, E-250, E-350, Excursion, F-250 Super Duty, and F-350 Super Duty applications, including heater to pipe and heater to water pump positions. This part cross-references Ford F7UZ-18472-NA and F81Z-18472-MB for the same application.

What It Is Used For

• Replacing a cracked or leaking heater hose in Ford E-150 and E-250 vans
• Restoring coolant flow in Ford E-350 Super Duty heater circuits
• Servicing heater to water pump routing on Ford Excursion and Super Duty trucks
• Addressing soft, swollen, or heat-aged HVAC hose sections
• Correcting coolant seepage at the heater hose connection points

Installation Notes and Tips

• Verify the vehicle uses a 5/8 in. heater hose connection before ordering.
• Confirm the application notes: some listings require no auxiliary heater, and some require no Quick Connect.
• Inspect adjoining heater pipes, clamps, and fittings for wear before installation.
• Match the hose routing to the original heater-to-pipe-1 or heater-to-water-pump path.

Quality Assurance

Dayco 87890 is manufactured to SAE J20R3 Class D-1 and SAE J1684 Type EC standards for heater hose service. It is a direct-fit replacement for the listed Ford applications, including 1997-2004 Ford E-150, E-250, E-350, Excursion, F-250 Super Duty, and F-350 Super Duty models.