Dayco 87662 HVAC Heater Hose - Pipe To Pipe

Dayco Small I.D. Heater Hose 87662

Dayco 87662 is a Small I.D. Heater Hose built for HVAC heater hose service in vehicles that use a 5/8 in. pipe-to-pipe connection. Made from EPDM and finished in black, it is specified to meet SAE J20R3 Class D-1 and SAE J1684 Type EC requirements for heater hose applications.

Compatible with select Chevrolet Lumina, Oldsmobile Cutlass Supreme, Pontiac Grand Prix, and Buick Regal models, this Dayco heater hose is a direct-fit option for small inside diameter coolant transfer routing. The Dayco Small I.D. Heater Hose line focuses on replacement hoses for heater and coolant circulation paths where correct diameter and material compatibility matter.

• EPDM construction for heater hose service
• 5/8 in. inside diameter at both ends
• Single I.D. hose design for pipe-to-pipe routing
• Black finish for a clean OE-style appearance
• Built to SAE J20R3 Class D-1 and SAE J1684 Type EC specifications

Vehicle Fitment

• Fits 1990-1993 Chevrolet Lumina, Pipe To Pipe, Small I.D. Heater Hose
• Fits 1988-1993 Oldsmobile Cutlass Supreme, Pipe To Pipe, Small I.D. Heater Hose
• Fits 1988-1993 Pontiac Grand Prix, Pipe To Pipe, Small I.D. Heater Hose
• Fits 1988-1992 Buick Regal, Pipe To Pipe, Small I.D. Heater Hose

What This Heater Hose Is Used For

• Replacing a cracked or leaking heater hose in the coolant circuit
• Restoring heater core coolant flow in pipe-to-pipe routing
• Addressing soft, swollen, or heat-aged hose material
• Correcting fitment issues caused by worn 5/8 in. hose connections
• Maintaining proper HVAC heater hose routing in the engine bay

Installation Notes and Tips

Verify the hose path, end diameter, and pipe-to-pipe routing before installation. Match the 5/8 in. inside diameter to the existing heater hose connection points and inspect adjoining pipes for corrosion, scale, or sharp edges that can affect sealing. This part cross-references Gates 18800 and NAPA 10800 for the same application.

Quality Assurance

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