Dayco 87970 HVAC Heater Hose - Upper

Overview

Dayco 87970 is a branched HVAC heater hose built for Ford van applications that require a small I.D. heater hose in the upper routing position. It uses EPDM construction and SAE J20R3 Class D-1 / SAE J1684 Type EC specifications for service in heater circuit applications.

Compatible With Ford E-350 Super Duty, Ford E-450 Super Duty, Ford E-150, Ford E-250, and Ford E-150 Club Wagon applications listed below. This part number, 87970, is a fitment-specific replacement for upper heater hose routing where the original hose uses 5/8-inch and 3/4-inch branch connections.

Key Features

• EPDM rubber construction for heater hose service
• Branched hose design with 5/8-inch and 3/4-inch end sizes
• Black finish for a factory-style appearance
• Built to SAE J20R3 Class D-1 and SAE J1684 Type EC requirements
• Dayco Small I.D. Heater Hose line for application-specific routing

Detailed Description

Dayco 87970 is engineered as a branched heater hose for upper HVAC routing in Ford E-Series and Club Wagon applications. The hose is formed from EPDM and sized with multiple branch diameters to match the heater circuit layout used on the listed vehicles. If you are replacing a worn or leaking upper heater hose on a Ford E-350 Super Duty or Ford E-450 Super Duty, this part number provides the correct small I.D. configuration for the specified applications.

The Small I.D. Heater Hose product line focuses on application-matched hose routing for heater systems that use reduced-diameter connections and branched layouts. Part number 87970 is intended for vehicles with the exact fitment notes shown in the table, including auxiliary heater and A/C-related configurations where specified.

This part cross-references no listed interchange numbers for the same application.

What It Helps Address

• Cracked or deteriorated heater hose material
• Coolant seepage at branched hose connections
• Incorrect hose routing in upper heater circuit applications
• Replacement needs for small I.D. heater hose layouts
• Fitment issues on listed Ford van heater systems

Installation Notes

Verify the vehicle year, model, and fitment notes before installation. This hose is specific to upper routing and to the listed auxiliary heater or A/C configurations where noted. Match the branch diameters and connection layout to the original hose before removal. Professional installation is recommended for proper heater system sealing and routing.

Quality Assurance

Dayco manufactures this hose to published SAE specifications for heater hose service. Part number 87970 is built for the listed Ford applications and the Small I.D. Heater Hose product line.