Dayco 87698 HVAC Heater Hose

Dayco Small I.D. Heater Hose 87698

Dayco 87698 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 and finished in black, this heater hose follows SAE J20R3 Class D-1 and SAE J1684 Type EC specifications for common heater hose applications.

Use this Dayco heater hose for direct replacement service on select Mitsubishi Eclipse, Mitsubishi Endeavor, Mitsubishi Galant, Volvo S40, Volvo V40, and other listed vehicles that call for a small I.D. heater hose. The Dayco 87698 part number is also a useful reference when matching OE-style heater hose routing and connection size.

Key Features

• EPDM construction for heater hose service
• 5/8 in. inside diameter at both ends
• Single I.D. hose design for straightforward routing
• Black finish for a clean OE-style appearance
• Meets SAE J20R3 Class D-1 and SAE J1684 Type EC requirements
• Dayco 87698 small I.D. heater hose for HVAC hose replacement

Product Details

Dayco’s Small I.D. Heater Hose line focuses on heater circuit applications that require accurate hose sizing and dependable material performance. This hose uses EPDM rubber, a common choice for coolant and heater hose service, and it is specified with a 5/8 in. inside diameter on both ends. The Dayco 87698 is listed for a wide range of vehicles and heater hose positions, including heater outlet, heater inlet, heater to engine, heater to pipe, and auxiliary heater routing.

Compatible vehicle coverage includes 2006-2012 Mitsubishi Eclipse, 2011 Mitsubishi Endeavor, 2007-2009 Mitsubishi Galant, 2000-2004 Volvo S40, 2000-2004 Volvo V40, and additional Chrysler, Dodge, Plymouth, Buick, Chevrolet, Oldsmobile, Pontiac, and Ford applications shown in the fitment data. If you are searching for a Dayco 87698 heater hose for a Mitsubishi Eclipse heater outlet or a Volvo S40 heater to engine connection, this part number is a direct reference point for the correct small I.D. hose style.

This part cross-references Gates 18868 for the same application.

Common Uses

• Replacing a cracked or hardened heater hose
• Restoring coolant flow through the heater circuit
• Correcting leaks at a 5/8 in. heater hose connection
• Servicing heater outlet, heater inlet, or heater to engine routing
• Matching OE-style hose size for listed Mitsubishi and Volvo applications

Installation Notes

Verify the hose routing, connection points, and inside diameter before installation. This hose does not include a heat shield or protective sleeve, so check the vehicle application notes carefully where sleeve protection is specified. Confirm that the hose path clears moving parts and hot surfaces, especially on auxiliary heater and underhood heater hose runs.

For best results, inspect adjoining pipes, clamps, and fittings for corrosion or wear before installing the new hose. Dayco 87698 should be matched to the exact heater hose position listed for the vehicle, such as heater outlet, heater inlet, heater to pipe, or heater to engine.

Quality Assurance

Dayco heater hoses are built to meet published SAE hose specifications for heater circuit service. This product is identified as Dayco 87698 and is supported by the brand’s Small I.D. Heater Hose product line for OE-style replacement applications.