Dayco 87864 HVAC Heater Hose

Dayco Small I.D. Heater Hose 87864

Dayco 87864 is a Small I.D. Heater Hose built for heater circuit service where a 5/8 in. inside diameter is required at both ends. Made from EPDM and finished in black, it follows SAE J20R3 Class D-1 and SAE J1684 Type EC specifications for heater hose applications.

This Dayco Small I.D. Heater Hose line is focused on direct-fit heater hose routing for vehicles that use a smaller inside diameter connection at the heater core or pipe. The 87864 part number is used across multiple GM, Ford, and Isuzu applications, including Chevrolet Colorado, GMC Canyon, and Ford F-150 fitments.

Key Features

• EPDM construction for heater hose service
• 5/8 in. inside diameter at both ends
• Single I.D. hose design for heater circuit routing
• Black finish for OE-style appearance
• Built to SAE J20R3 Class D-1 and SAE J1684 Type EC standards
• Dayco part number 87864 for heater inlet, heater outlet, and pipe-to-heater applications

Fitment Coverage

• Fits 2010-2012 Chevrolet Colorado, Pipe To Heater
• Fits 2010-2012 Chevrolet Colorado, Heater Inlet
• Fits 2004-2006 Chevrolet Colorado, Heater Inlet
• Fits 2008-2012 Chevrolet Colorado, Heater To Pipe
• Fits 2004-2006 Chevrolet Colorado, Heater To Pipe
• Fits 2009-2011 GMC Canyon, Pipe To Heater
• Fits 2004-2006 GMC Canyon, Pipe To Heater
• Fits 2008-2010 GMC Canyon, Heater Inlet
• Fits 2008-2009 Chevrolet Colorado, Pipe To Heater Inlet
• Fits 2006 Isuzu i-280, Pipe To Heater
• Fits 2006 Isuzu i-350, Pipe To Heater
• Fits 2002-2005 Chevrolet Trailblazer EXT, Heater To Pipe-1, without auxiliary heater
• Fits 2002-2005 GMC Envoy, Heater To Pipe-1, without auxiliary heater
• Fits 2002-2005 GMC Envoy XL, Heater To Pipe-1, without auxiliary heater
• Fits 2004-2005 GMC Envoy XUV, Heater To Pipe-1, without auxiliary heater
• Fits 2003-2005 Isuzu Ascender, Heater To Pipe-1, without auxiliary heater
• Fits 2005 Saab 9-7x, Heater To Pipe-1, without auxiliary heater
• Fits 2004 Ford F-150 Heritage, Heater Inlet
• Fits 2002-2004 Oldsmobile Bravada, Heater To Pipe-1, without auxiliary heater
• Fits 2003 Ford F-150, Heater Inlet
• Fits 2002 Chevrolet Trailblazer, Heater Outlet
• Fits 1999 Ford F-150, Heater To Pipe, without Quick Connect
• Fits 1999 Ford F-250, Heater To Pipe, without Quick Connect
• Fits 1997-1998 Ford F-150, Pipe To Heater, without Quick Connect
• Fits 1997-1998 Ford F-250, Pipe To Heater, without Quick Connect

What It Helps Address

• Cracked or aged heater hose sections in the coolant circuit
• Leaking heater inlet or heater outlet hose connections
• Restricted coolant flow between the engine and heater core
• Replacement needs on Chevrolet Colorado and GMC Canyon heater hose routing
• Service on Ford F-150 and F-250 heater pipe connections without Quick Connect

Installation Notes

Verify the hose routing, end diameters, and position before installation. This part uses a 5/8 in. inside diameter at both ends and is listed for specific heater inlet, heater outlet, pipe-to-heater, and heater-to-pipe applications. On listed Ford applications, confirm whether the vehicle is equipped without Quick Connect; on listed GM applications, confirm whether the vehicle uses the auxiliary-heater or non-auxiliary-heater configuration noted in fitment.

This part cross-references ACDelco 14257S and Gates 19193 for the same application.

Quality Assurance

Dayco identifies this hose to SAE J20R3 Class D-1 and SAE J1684 Type EC requirements, supporting standardized heater hose service for the listed applications. Dayco 87864 is a direct-fit option for owners servicing Chevrolet Colorado, GMC Canyon, and Ford F-150 heater hose connections.