Dayco 88351 HVAC Heater Hose

Dayco Small I.D. Heater Hose 88351

Dayco 88351 is a Small I.D. Heater Hose built with EPDM construction and a black finish for heater circuit service. With 3/4 in. inside diameter at both ends, it is a direct choice for select HVAC heater hose routing where a small-diameter hose is specified.

This Dayco Small I.D. Heater Hose line is focused on OE-style replacement for heater and coolant transfer paths that require accurate sizing and SAE-rated hose construction. Part number 88351 is listed for a wide range of applications, including Acura RDX, Saturn Ion, Saturn Vue, Chevrolet Malibu, Pontiac G6, and related vehicles.

Key Features

• EPDM rubber construction for heater hose service
• Black finish for a clean OE-style appearance
• 3/4 in. inside diameter on both ends
• Single I.D. hose design
• Meets SAE J20R3 Class D-1 and SAE J1684 Type EC specifications
• Dayco part number 88351 for HVAC heater hose replacement

Product Details

Dayco 88351 is an HVAC heater hose intended for small inside diameter routing in cooling and heater circuits. The EPDM material is commonly used in underhood coolant applications, while the SAE J20R3 Class D-1 and SAE J1684 Type EC specifications identify the hose as a service-grade option for heater hose replacement. This part number is used across multiple vehicle platforms, including 2007-2012 Acura RDX, 2004-2007 Saturn Ion, 2006-2007 Saturn Vue, 2004-2005 Chevrolet Malibu, and 2006-2007 Pontiac G6.

This part cross-references Gates 19602 for the same application.

Common Problems This Hose Can Address

• Cracked or hardened heater hose material
• Coolant seepage at a worn hose section
• Incorrect hose diameter during heater hose replacement
• Degraded hose routing in small I.D. HVAC connections
• Service replacement for select reservoir, pipe, valve, and heater outlet connections

Installation Notes and Tips

• Verify the vehicle-specific routing and position before cutting or trimming.
• Some listed applications note that the hose must be cut on both ends.
• Confirm the 3/4 in. inside diameter matches the original hose connection points.
• Inspect clamps, fittings, and adjoining pipes for wear before installation.
• Use the fitment notes for the exact connection point, such as heater outlet, valve to engine, or pipe to reservoir.

Quality Assurance

Dayco 88351 is built to SAE J20R3 Class D-1 and SAE J1684 Type EC specifications, supporting consistent heater hose service in approved applications. Confirm fitment against the vehicle listing before installation.