Dayco 87987 HVAC Heater Hose - Heater Inlet

Dayco Small I.D. Heater Hose for Ram

Dayco 87987 is a Small I.D. Heater Hose built for heater inlet service on select Dodge Ram trucks. It uses EPDM construction and a black finish, with 5/8-inch inside diameter ends for a direct-style hose replacement on the specified applications.

Key Features

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

Product Details

This Dayco heater hose is part of the Small I.D. Heater Hose line and is intended for heater inlet use on 2006-2008 Dodge Ram 1500, 2006-2008 Dodge Ram 2500, and 2006-2008 Dodge Ram 3500 applications. The hose measures 5/8 inch inside diameter at both ends, with an outside diameter of 31/32 inch at each end, and is identified as Dayco 87987. EPDM material is commonly used in cooling and HVAC hose applications because it is suited to heat and coolant exposure in underhood environments.

This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.

Common Replacement Reasons

• Cracked or hardened heater hose material
• Coolant seepage at the heater inlet connection
• Restricted heater flow from aged hose collapse
• Loss of heater performance in Dodge Ram 1500, Ram 2500, or Ram 3500 trucks
• Need for a direct replacement heater inlet hose with 5/8-inch ends

Installation Notes

Verify hose routing, end diameter, and heater inlet location before installation. Match the existing hose path on the vehicle and confirm the connection points on the 2006-2008 Dodge Ram 1500, Ram 2500, or Ram 3500 before removing the old hose. Inspect adjoining clamps, fittings, and heater core connections for wear or corrosion during service.

Quality Assurance

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