Dayco 86802 HVAC Heater Hose

Dayco Small I.D. Heater Hose 86802

Dayco 86802 is a Small I.D. Heater Hose built for heater and coolant routing where a 5/16 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 hose service.

Key Features

• EPDM construction for heater hose applications
• 5/16 in. inside diameter at End 1 and End 2
• Single I.D. hose design for small-diameter coolant routing
• Black finish for a clean OE-style appearance
• Built to SAE J20R3 Class D-1 and SAE J1684 Type EC specifications
• Dayco 86802 small I.D. heater hose for targeted HVAC hose replacement

Product Details

This Dayco Small I.D. Heater Hose line is focused on compact coolant and heater connections where standard heater hose sizes do not apply. Dayco 86802 is used in pipe-to-tee, tee-to-pipe, throttle body, heater outlet, intake manifold, and thermostat routing on a range of vehicles, including Honda Civic, Honda CRX, Mitsubishi Mirage, Chrysler Intrepid, and Ford Ranger. The 5/16 in. I.D. at both ends makes it a direct-size solution for small coolant passages, and the EPDM material is suited to underhood HVAC and heater hose service.

This part cross-references Gates 18200 for the same application.

What It Helps Address

• Cracked or hardened small-diameter heater hose
• Coolant seepage at pipe-to-tee or tee-to-pipe connections
• Restricted heater circuit flow from deteriorated hose material
• Vacuum or coolant routing issues at throttle body and intake manifold connections
• Service replacement needs on older Honda Civic, Honda CRX, Mitsubishi Mirage, and Ford Ranger applications

Installation Notes and Tips

Verify the required hose inside diameter before installation; Dayco 86802 is a 5/16 in. I.D. hose at both ends. Match the routing position shown in the vehicle fitment data, such as pipe to tee, throttle body to engine, heater outlet, or thermostat to intake manifold. Inspect adjoining pipes, tees, and clamps for wear before installing the new hose, and confirm the hose follows the original path without kinks or twist.

Quality Assurance

Dayco 86802 is manufactured to SAE J20R3 Class D-1 and SAE J1684 Type EC specifications for heater hose applications. The EPDM construction supports consistent performance in small I.D. coolant and HVAC routing.