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Dayco 72315 Radiator Coolant Hose - Lower - Engine To Pipe
| Brand | Dayco 72315 |
|---|---|
| Position | Lower - Engine To Pipe |
| Color | Black |
| Contains Protective Sleeve | Y |
| End 1 Inside Diameter | 1 9/32 |
| End 2 Inside Diameter | 1 9/32 |
| Hose Type | Single I.D. Hose |
| Material | EPDM |
| SAE Specification | SAE J20R4 Class D-1, SAE J1684 Type EC |
| Trunk Height | 11 1/2 |
| Product line | Curved Radiator Hose |
| Fits | Mazda · 6 vehicles |
Curved hose design. Helps route coolant smoothly with a clean, compact shape.
EPDM construction. Resists heat and coolant exposure for dependable service.
Protective sleeve included. Adds extra abrasion protection where the hose needs it.
Cross-references ACDelco 20702S, Duralast D72315 and Gates 24293 for the same application. See all 6.
Dayco 72315 Curved Radiator Hose Overview
The Dayco 72315 curved radiator hose is a molded EPDM coolant hose built for the lower engine-to-pipe connection on select Mazda 6 models. It is shaped for the application and includes a protective sleeve to help manage underhood exposure in the hose routing area.
Compatible with 2003-2008 Mazda 6, lower - engine to pipe, this Dayco Curved Radiator Hose supports a direct-fit cooling system repair for the specified vehicle range. The 72315 part number is also a useful reference when comparing replacement options for the same application.
Key Features
- EPDM construction for coolant-system service
- Black finish for a factory-style appearance
- Single I.D. hose design
- 1 9/32 in. inside diameter at both ends
- Protective sleeve included for added abrasion resistance
- Built to SAE J20R4 Class D-1 and SAE J1684 Type EC specifications
- Curved radiator hose profile for the lower engine-to-pipe routing
Product Details
Dayco’s Curved Radiator Hose line is focused on molded coolant hoses that match the routing and connection points required by specific vehicles. For the Mazda 6, Part Number 72315 is formed to the lower engine-to-pipe position and uses EPDM rubber to handle coolant exposure in a demanding underhood environment. The hose’s curved shape helps it follow the original path, while the protective sleeve adds an extra layer where the hose is exposed to nearby components.
This part cross-references ACDelco 20702S and Gates 24293 for the same application. It is a direct replacement choice for owners searching for a Mazda 6 lower radiator hose, Dayco 72315, or a molded coolant hose for 2003-2008 Mazda 6 models.
Common Cooling System Issues
- Cracked or split lower radiator hose
- Coolant seepage at the hose body
- Softening or swelling from age and heat
- Incorrect hose routing after a previous repair
- Loss of coolant flow through a damaged hose
Installation Notes
Verify the hose routing, end diameters, and position before installation. Inspect the mating pipe and radiator connection points for corrosion, residue, or sharp edges that could affect sealing or hose life. Replace coolant as needed and confirm the system is properly filled and bled after service.
Quality Assurance
This Dayco radiator coolant hose is manufactured to meet SAE J20R4 Class D-1 and SAE J1684 Type EC requirements, supporting consistent material and dimensional standards for the listed Mazda 6 applications.
| Year | Make | Model | Liters | Cylinders | Position | Notes |
|---|---|---|---|---|---|---|
| 2008 | Mazda | 6 | 2.3L | L4 | Lower - Engine To Pipe | Curved Radiator Hose |
| 2007 | Mazda | 6 | 2.3L | L4 | Lower - Engine To Pipe | Curved Radiator Hose |
| 2006 | Mazda | 6 | 2.3L | L4 | Lower - Engine To Pipe | Curved Radiator Hose |
| 2005 | Mazda | 6 | 2.3L | L4 | Lower - Engine To Pipe | Curved Radiator Hose |
| 2004 | Mazda | 6 | 2.3L | L4 | Lower - Engine To Pipe | Curved Radiator Hose |
| 2003 | Mazda | 6 | 2.3L | L4 | Lower - Engine To Pipe | Curved Radiator Hose |
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