Dayco 87884 HVAC Heater Hose

Dayco Small I.D. Heater Hose 87884

Dayco 87884 is a Small I.D. Heater Hose built for HVAC heater circuit service where a 5/8 in. inside diameter is required at both ends. Made from EPDM rubber in black, this heater hose is specified to SAE J20R3 Class D-1 and SAE J1684 Type EC for use in demanding coolant transfer applications.

This Dayco heater hose line is focused on small inside diameter routing for heater outlet, heater inlet, and heater-to-pipe connections. For buyers searching for a Toyota Tundra heater hose, Toyota Sequoia heater hose, or Toyota Land Cruiser heater outlet hose, part number 87884 matches the listed applications and dimensions.

Key Features

• Brand: Dayco Small I.D. Heater Hose
• Part number: 87884
• Material: EPDM rubber
• Color: Black
• End 1 inside diameter: 5/8 in.
• End 2 inside diameter: 5/8 in.
• End 1 outside diameter: 15/16 in.
• End 2 outside diameter: 15/16 in.
• Single I.D. hose design for heater circuit routing
• Built to SAE J20R3 Class D-1 and SAE J1684 Type EC specifications

Product Details

Dayco 87884 is an EPDM HVAC heater hose for coolant flow between heater components and engine-side plumbing. The single I.D. hose construction uses the same 5/8 in. inside diameter at both ends, making it a direct match for listed heater outlet, heater inlet, heater-to-pipe, tee-to-thermostat, and valve-to-thermostat applications. This part cross-references Duralast D87884 for the same application.

Fits 2010-2021 Toyota Tundra, Heater Outlet. Fits 2013 Toyota Land Cruiser, Heater Outlet. Fits 2013 Toyota Sequoia, Heater Outlet. Fits 2007-2011 Toyota Tundra, Heater To Pipe, Passenger Side; Small I.D. Heater Hose. Fits 2007-2008 Hummer H3, Heater Inlet. Fits 2007-2008 Isuzu i-370, Heater Inlet. Fits 2007 Chevrolet Colorado, Heater Inlet. Fits 2007 GMC Canyon, Heater Inlet. Fits 1995-1997 Ford Ranger, Tee To Thermostat. Fits 1996-1997 Mazda B3000, Tee To Thermostat. Fits 1995 Mazda B3000, Valve To Thermostat.

Common Uses

• Replacing a cracked or heat-aged heater hose
• Restoring coolant flow to the heater core circuit
• Fixing leaks at heater outlet or heater inlet connections
• Addressing soft, swollen, or collapsed hose sections
• Servicing small I.D. heater hose routing on Toyota, Ford, Mazda, Chevrolet, GMC, Hummer, and Isuzu applications

Installation Notes and Tips

Verify the hose routing, end diameters, and connection points before installation. Match the 5/8 in. inside diameter and the listed heater outlet, heater inlet, or heater-to-pipe position to confirm proper fitment for your vehicle. Inspect adjoining pipes, clamps, and thermostat-area connections for wear before installing the new hose.

Quality Assurance

Dayco 87884 is manufactured to SAE J20R3 Class D-1 and SAE J1684 Type EC requirements, supporting consistent heater hose performance in automotive HVAC coolant circuits.