Dayco 88452 HVAC Heater Hose - Valve To Engine

Dayco Small I.D. Heater Hose 88452

Dayco 88452 is a Small I.D. Heater Hose built for HVAC heater circuit service where a 3/4 in. inside diameter is required. This EPDM hose uses a black finish and a protective sleeve to help support routing in the engine bay, making it a direct replacement choice for select Nissan Quest, Chevrolet Express, and GMC Savana applications.

Key Features

• EPDM construction for heater hose service
• 3/4 in. inside diameter at both ends
• Black hose with protective sleeve
• Single I.D. hose design for valve-to-engine routing
• Built to SAE J20R3 Class D-1 and SAE J1684 Type EC specifications
• Dayco Small I.D. Heater Hose line for select HVAC hose applications

Product Details

Dayco’s Small I.D. Heater Hose line focuses on heater hose routing where compact diameter and consistent fit are required. Part number 88452 measures 3/4 in. inside diameter on both ends, with an outside diameter of 1 3/32 in. at each end and a trunk height of 15 1/2 in. The EPDM rubber construction is suited for coolant transfer in heater hose service, while the included protective sleeve adds an extra layer for routing near engine components. This part cross-references ACDelco 16236M and Gates 19773 for the same application.

Compatible With select 2004-2005 Nissan Quest valve-to-engine heater hose routing, as well as 1996-2002 Chevrolet Express 1500, Express 2500, and Express 3500 valve-to-engine applications with A/C and without auxiliary heater. It also matches 1996-2002 GMC Savana 1500, Savana 2500, and Savana 3500 valve-to-engine configurations with the same notes. Dayco 88452 is a fitment-specific replacement for vehicles that require a Small I.D. Heater Hose in these HVAC hose positions.

What It Helps Address

• Coolant transfer issues in the heater hose circuit
• Cracked, hardened, or leaking heater hose sections
• Incorrect hose diameter at valve-to-engine routing points
• Routing wear where a protective sleeve is needed
• Replacement needs on aging Nissan Quest, Chevrolet Express, and GMC Savana heater hose assemblies

Installation Notes

Verify the 3/4 in. inside diameter, outside diameter, and valve-to-engine routing before installation. Match the hose path to the original layout on the vehicle and confirm clearance around nearby engine components. This part is intended for the listed fitments only, including 2004-2005 Nissan Quest and 1996-2002 Chevrolet Express and GMC Savana models.

Quality Assurance

Dayco 88452 is manufactured 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 built for consistent replacement use in HVAC coolant routing applications.