Dayco 88356 HVAC Heater Hose

Dayco Small I.D. Heater Hose 88356

Dayco 88356 is a Small I.D. Heater Hose built for heater circuit service where a 3/4 in. inside diameter is required at both ends. Made from EPDM and finished in black, this HVAC heater hose is specified to SAE J20R3 Class D-1 and SAE J1684 Type EC standards for heater and coolant routing applications.

Use this hose when servicing heater inlet, heater outlet, lower, tee-to-pipe, pipe-to-tee, and heater-to-thermostat connections on select Chevrolet, Hyundai, and Kia vehicles. The Dayco Small I.D. Heater Hose line focuses on direct-fit heater hose routing for common OE-style replacement needs, including applications on the Chevrolet Malibu, Hyundai Sonata, and Kia Optima.

Key Features

• EPDM construction for heater hose service
• Black finish for a clean OE-style appearance
• 3/4 in. inside diameter at both ends
• Single I.D. hose design
• Meets SAE J20R3 Class D-1 and SAE J1684 Type EC specifications
• No heat shield and no protective sleeve

Detailed Description

Dayco 88356 is a replacement HVAC heater hose for coolant transfer in the heater circuit. Its EPDM material is suited for underhood hose routing, while the single I.D. design and 3/4 in. end sizes support direct replacement in applications that call for a small inside diameter heater hose. This part cross-references Gates 19547 and NAPA 11547 for the same application.

Compatible With 2011-2012 Chevrolet Malibu, lower and heater to thermostat; 2006-2010 Hyundai Sonata, lower and heater inlet; and 2006-2010 Kia Optima, heater inlet. It also applies to additional heater hose routing on Kia Magentis, Chevrolet Lumina APV, Oldsmobile Silhouette, Pontiac Trans Sport, and Cadillac DeVille, among other listed vehicles.

Common Uses

• Replacing a cracked or leaking heater hose
• Restoring coolant flow through the heater circuit
• Repairing heater inlet or heater outlet hose routing
• Addressing soft, swollen, or heat-aged EPDM hose sections
• Servicing lower, tee-to-pipe, or pipe-to-tee heater connections

Installation Notes and Tips

Verify the required hose routing, position, and inside diameter before installation. Match the vehicle application exactly, since this hose is listed for multiple positions across different models. Inspect adjoining pipes, tees, and clamps for wear or corrosion before installing the replacement hose.

Quality Assurance

Dayco 88356 is built to SAE J20R3 Class D-1 and SAE J1684 Type EC specifications for heater hose service. The Dayco Small I.D. Heater Hose line is intended for direct replacement use in listed HVAC heater hose applications.