Dayco 87630 HVAC Heater Hose

Dayco Small I.D. Heater Hose 87630

Dayco 87630 is a Small I.D. Heater Hose built for HVAC heater circuit service where a dual inside diameter connection is required. Made from EPDM and finished in black, it is engineered to match common heater hose routing on vehicles such as Chevrolet Traverse, Buick Enclave, and GMC Acadia applications.

The Dayco Small I.D. Heater Hose line focuses on direct-fit heater hose routing for specific OE-style connections. Part number 87630 uses a dual I.D. design with 5/8-inch and 3/4-inch ends to support the transition points found in heater and auxiliary heater pipe layouts.

Key Features

• EPDM construction for HVAC heater hose service
• Dual I.D. hose design with 5/8 in. and 3/4 in. ends
• Black finish for a clean OE-style appearance
• Built to SAE J20R3 Class D-1 and SAE J1684 Type EC specifications
• Direct replacement style for select heater outlet and auxiliary heater pipe connections
• Dayco 87630 for small inside diameter heater hose applications

Detailed Description

Dayco 87630 is a small inside diameter heater hose intended for heater circuit routing where one end measures 5/8 inch and the other measures 3/4 inch. The EPDM hose material is commonly used in automotive cooling and HVAC systems because it is suited to heater hose service and temperature exposure. This part number is listed for a wide range of vehicles, including 2009-2018 Chevrolet Traverse, 2008-2017 Buick Enclave, and 2007-2016 GMC Acadia heater hose locations.

Fitment language includes applications such as Fits 2009-2018 Chevrolet Traverse, Heater - Lower Tee To Auxiliary Heater Pipe; Fits 2008-2017 Buick Enclave, Tee To Auxiliary Heater Pipe-2; and Fits 2007-2016 GMC Acadia, Heater - Lower Tee To Auxiliary Heater Pipe. This makes 87630 a relevant search match for buyers looking for a heater hose for Chevrolet Traverse, Buick Enclave, or GMC Acadia HVAC repair work.

This part cross-references ACDelco 18032L and Gates 18744 for the same application.

Common Repair Uses

• Replacing a cracked or softened heater hose in the HVAC circuit
• Restoring coolant flow between the heater outlet and auxiliary heater pipe
• Addressing leaks at tee-to-pipe or tee-to-reservoir hose connections
• Repairing heat-related hose deterioration in older cooling system plumbing
• Matching OE-style routing on select Chevrolet, Buick, and GMC vehicles

Installation Notes and Tips

Verify the hose end diameters before installation, since Dayco 87630 uses a dual I.D. configuration. Confirm the vehicle’s heater hose routing and connection points against the listed position, such as heater outlet, tee to engine, or heater to water pump, before removing the original hose.

Inspect adjoining pipes, tees, and clamps for wear, corrosion, or coolant residue so the new hose seals correctly. This hose does not include a heat shield or protective sleeve.

Quality Assurance

Dayco 87630 is manufactured to SAE J20R3 Class D-1 and SAE J1684 Type EC specifications, supporting consistent heater hose performance for automotive HVAC service.