Dayco 87888 HVAC Heater Hose - Bypass To Tee or Valve To Intake Manifold

Dayco Small I.D. Heater Hose 87888

Dayco 87888 is a Small I.D. Heater Hose built for HVAC heater hose service where a 5/8 in. inside diameter is required at both ends. Made from EPDM and finished in black, it is specified to SAE J20R3 Class D-1 and SAE J1684 Type EC standards for heater and coolant routing in select Toyota Highlander, Honda Accord, and Acura CL applications.

Key Features

• EPDM construction for heater hose use in engine cooling and HVAC circuits
• 5/8 in. inside diameter at both ends for a uniform single I.D. hose layout
• Black finish for a clean OE-style appearance
• Built to SAE J20R3 Class D-1 and SAE J1684 Type EC specifications
• Dayco Small I.D. Heater Hose line for select bypass and intake manifold heater hose routing
• Part number 87888 for easy identification during replacement lookup

Detailed Description

Dayco 87888 is an HVAC heater hose engineered for small-diameter coolant transfer paths. The EPDM rubber construction is suited to heater hose service, while the 5/8 in. inside diameter on both ends supports direct routing in applications that call for a single I.D. hose. This hose is listed for 2004-2007 Toyota Highlander bypass-to-tee routing with rear air, 1997-1999 Acura CL valve-to-intake-manifold routing, and 1994-1997 Honda Accord valve-to-intake-manifold routing. The Dayco Small I.D. Heater Hose line focuses on these tighter coolant connections where accurate sizing matters. Part number 87888 is also a useful reference when cross-checking replacement options.

This part cross-references ACDelco (e.g., 16248M, 16394M) for the same application.

What It Is Used For

• Replacing a cracked or leaking heater hose in the coolant circuit
• Restoring coolant flow between the valve and intake manifold on Honda Accord and Acura CL applications
• Servicing bypass-to-tee heater hose routing on Toyota Highlander models with rear air
• Addressing soft, swollen, or heat-aged EPDM hose sections
• Correcting coolant seepage at small-diameter HVAC hose connections

Installation Notes and Tips

Verify the hose routing, end diameters, and position before installation. Confirm the vehicle application by year, make, model, and hose location: Fits 2004-2007 Toyota Highlander, Bypass To Tee; Fits 1997-1999 Acura CL, Valve To Intake Manifold; Fits 1994-1997 Honda Accord, Valve To Intake Manifold. Inspect adjoining fittings and clamps for wear, and replace any damaged connection points before installing the new hose. Match the hose path to the original routing to avoid kinks or tension at the bends.

Quality Assurance

Dayco manufactures this hose to SAE J20R3 Class D-1 and SAE J1684 Type EC specifications, supporting consistent heater hose performance in the listed applications. The EPDM material and OE-style sizing align with common replacement requirements for small I.D. coolant hose service.