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Dayco 72305 Radiator Coolant Hose - Lower
| Brand | Dayco 72305 |
|---|---|
| Position | Lower |
| Color | Black |
| End 1 Inside Diameter | 1 5/16 |
| End 2 Inside Diameter | 1 7/16 |
| Hose Type | Dual I.D. Hose |
| Material | EPDM |
| SAE Specification | SAE J20R4 Class D-1, SAE J1684 Type EC |
| Trunk Height | 17 |
| Product line | Curved Radiator Hose |
| Fits | Toyota · 3 vehicles |
Curved hose design. Helps route coolant smoothly through the cooling system.
EPDM construction. Resists heat and coolant exposure for dependable service.
Dual I.D. hose. Features two inside diameters for a precise fit.
Cross-references ACDelco 24518L, CARQUEST 22901 and Duralast E72305 for the same application. See all 7.
Dayco 72305 Curved Radiator Hose Overview
Dayco 72305 is a curved radiator coolant hose built for lower cooling-system routing on select Toyota applications. It uses EPDM construction and a dual I.D. design to match the different connection sizes required at each end.
Compatible with 2004-2006 Toyota Sienna lower radiator hose applications, this hose supports coolant transfer between the engine and radiator while following the factory-style curved path. The Dayco Curved Radiator Hose line focuses on application-specific fitment for cooling system service.
Key Features
- EPDM rubber construction for coolant hose service
- Black finish for a factory-style appearance
- Dual I.D. hose design with 1 5/16 in. end 1 and 1 7/16 in. end 2
- Curved lower radiator hose routing
- Built to SAE J20R4 Class D-1 and SAE J1684 Type EC specifications
- Dayco part number 72305 for direct reference
Detailed Description
Dayco 72305 is a radiator coolant hose for lower-position cooling system service on the 2004-2006 Toyota Sienna. The EPDM material is commonly used in coolant applications because it handles heat and coolant exposure in demanding engine bay conditions. Its dual I.D. construction helps accommodate the different connection diameters required by the vehicle’s cooling layout.
This hose cross-references Toyota 16572-AA020 for the same application. It also aligns with aftermarket references such as ACDelco 24518L and Gates 22901. If you are searching for a lower curved radiator hose for a 2004, 2005, or 2006 Toyota Sienna, Dayco 72305 is the relevant part number to verify against your original hose.
Common Cooling System Issues It Can Address
- Cracked or hardened lower radiator hose material
- Coolant seepage at the hose connection points
- Collapsed or softened hose sections from age and heat
- Incorrect replacement hose size at one or both ends
- Loss of proper coolant flow through the lower radiator circuit
Installation Notes and Tips
Confirm the hose routing, end diameters, and position before installation. Compare the removed hose to Dayco 72305 to verify the curved shape and dual I.D. sizing for the 2004-2006 Toyota Sienna lower radiator hose application. Inspect clamps, necks, and adjoining cooling-system components for wear or corrosion before reassembly.
Quality Assurance
Dayco manufactures this hose to SAE J20R4 Class D-1 and SAE J1684 Type EC specifications, supporting consistent material and dimensional requirements for radiator coolant service.
| Year | Make | Model | Position | Notes |
|---|---|---|---|---|
| 2006 | Toyota | Sienna | Lower | Curved Radiator Hose |
| 2005 | Toyota | Sienna | Lower | Curved Radiator Hose |
| 2004 | Toyota | Sienna | Lower | Curved Radiator Hose |
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