Dayco 88358 HVAC Heater Hose

Dayco Small I.D. Heater Hose 88358

Dayco 88358 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 heater hose is specified to SAE J20R3 Class D-1 and SAE J1684 Type EC standards for common HVAC hose applications.

Compatible With select Kia Sorento, Nissan Altima, Saturn Sky, Pontiac Solstice, and other listed vehicles, this hose supports heater inlet, heater outlet, and pipe-to-pipe routing where the original hose path calls for a small inside diameter line. The Dayco Small I.D. Heater Hose line is intended for direct-fit heater hose service across a wide range of domestic and import applications.

Key Features

• Dayco 88358 Small I.D. Heater Hose for HVAC heater circuit service
• EPDM construction for coolant and heat exposure in heater hose applications
• 3/4 in. inside diameter at both ends
• Single I.D. hose design for straightforward routing
• Black finish for a clean OE-style appearance
• Built to SAE J20R3 Class D-1 and SAE J1684 Type EC specifications

Detailed Description

Dayco 88358 is a small inside diameter heater hose used in coolant-heated HVAC systems where the hose must connect to heater inlet, heater outlet, tee, pipe, or valve locations. Its EPDM rubber construction is suited for hot coolant service, while the SAE specification listing helps identify it as a heater hose built for standard automotive cooling-system routing. This part number is commonly searched as Dayco 88358 heater hose, 3/4 heater hose, and small I.D. heater hose for vehicles such as Kia Sorento, Nissan Altima, Saturn Sky, and Pontiac Solstice.

This part cross-references ACDelco 16514M and Gates 19611 for the same application.

What It Is Used For

• Replacing a cracked or leaking heater hose in the HVAC coolant circuit
• Restoring coolant flow to the heater core inlet or outlet
• Addressing hose hardening, swelling, or soft spots from heat and age
• Repairing cut-to-fit heater hose routing on applications such as the Nissan Altima right-side hose path
• Servicing small I.D. heater hose connections on older domestic and import vehicles

Installation Notes and Tips

Verify the required inside diameter before installation; this hose is 3/4 in. at both ends. Some applications, including certain 2007-2012 Nissan Altima heater hose routes, require the hose to be cut on both ends to match the original path. Confirm routing, length, and connection style against the vehicle’s existing heater hose before final installation.

Quality Assurance

Dayco manufactures this heater hose to SAE J20R3 Class D-1 and SAE J1684 Type EC specifications, supporting consistent material and performance requirements for automotive heater hose service.