Dayco 87839 HVAC Heater Hose - Heater To Pipe, Heater To Pipe-1 or Heater To Pipe-2

Dayco Small I.D. Heater Hose 87839

Dayco 87839 is a Small I.D. Heater Hose built for heater-to-pipe connections that require a 5/8 in. inside diameter at both ends. Made from EPDM rubber in black, it is specified for HVAC heater hose service and follows SAE J20R3 Class D-1 and SAE J1684 Type EC requirements.

This Dayco Small I.D. Heater Hose line is focused on direct-fit heater hose routing for vehicles that need a compact molded-style hose path. For Acura Integra, Buick Century, Chevrolet Lumina, Chevrolet Monte Carlo, Pontiac Grand Prix, Oldsmobile Cutlass Supreme, Buick Regal, and related applications, part number 87839 provides the correct small I.D. configuration for heater-to-pipe connections.

• EPDM construction for heater hose service
• Black finish for OE-style appearance
• 5/8 in. inside diameter at both ends
• Single I.D. hose design for heater-to-pipe routing
• Built to SAE J20R3 Class D-1 and SAE J1684 Type EC specifications
• No heat shield and no protective sleeve

Fitment Details

• Fits 1999 Acura Integra, Heater To Pipe; Molded; Small I.D. Heater Hose
• Fits 1994-1998 Acura Integra, Heater To Pipe
• Fits 1999 Buick Century, Heater To Pipe
• Fits 1997-1998 Buick Century, Heater To Pipe-1
• Fits 1994-1996 Buick Regal, Heater To Pipe
• Fits 1999 Chevrolet Lumina, Heater To Pipe
• Fits 1995-1996 Chevrolet Lumina, Heater To Pipe
• Fits 1997-1998 Chevrolet Lumina, Heater To Pipe-2
• Fits 1995-1999 Chevrolet Monte Carlo, Heater To Pipe
• Fits 1996-1997 Oldsmobile Cutlass Supreme, Heater To Pipe
• Fits 1994 Oldsmobile Cutlass Supreme, Heater To Pipe
• Fits 1996 Pontiac Grand Prix, Heater To Pipe
• Fits 1997-1998 Pontiac Grand Prix, Heater To Pipe-2
• Fits 1994 Pontiac Grand Prix, Heater To Pipe

What This Heater Hose Helps Address

• Cracked or hardened heater hose material
• Coolant seepage at heater-to-pipe connections
• Incorrect hose diameter for the heater circuit
• Restricted heater flow caused by a deteriorated hose
• Service replacement needs on aging HVAC coolant lines

Installation Notes

Verify the hose routing, end diameters, and heater-to-pipe position before installation. Match the vehicle application to the listed fitment exactly, especially on models with Heater To Pipe-1 or Heater To Pipe-2 routing. Inspect adjoining pipes, clamps, and coolant passages for wear or corrosion before placing the hose in service.

Part number 87839 also cross-references ACDelco 16028M and Gates 18446 for the same application.

Quality Assurance

Dayco manufactures this heater hose to SAE J20R3 Class D-1 and SAE J1684 Type EC specifications, supporting consistent material and dimensional requirements for HVAC heater hose service. The EPDM construction is selected for coolant-carrying heater circuits where durability and fit are critical.