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Dayco 71009 Radiator Coolant Hose - Lower
| Brand | Dayco 71009 |
|---|---|
| Position | Lower |
| Material | Epdm |
| Color | Black |
| End 1 Inside Diameter | 2 1/2 |
| End 2 Inside Diameter | 3 |
| Contains Heat Shield | N |
| Contains Protective Sleeve | N |
| Hose Type | Dual i.d. hose |
| SAE Specification | Sae j20r4 class d-1, sae j1684 type ec |
| Trunk Height | 14 |
| Fits | — |
EPDM construction. Resists heat and coolant exposure for dependable cooling-system service.
Dual I.D. hose. Connects different hose sizes in one clean, practical design.
SAE-rated hose. Built to meet SAE J20R4 Class D-1 and SAE J1684 Type EC standards.
Cross-references ACDelco 22151M, CARQUEST 21291 and Duralast D71009 for the same application. See all 14.
Dayco 71009 Curved Radiator Hose Overview
Dayco 71009 is a curved radiator coolant hose built for cooling system service where a dual inside diameter hose is required. Made from EPDM rubber in black, it provides a formed fit for routing coolant between components while meeting SAE J20R4 Class D-1 and SAE J1684 Type EC specifications.
This Dayco Curved Radiator Hose line is engineered for applications that need a shaped hose profile rather than a straight universal hose. The 71009 part number is a practical replacement choice for cooling system repairs on vehicles such as Navistar truck applications and other heavy-duty coolant hose setups that use the same dual I.D. dimensions.
Key Features
- EPDM construction for coolant hose service
- Black finish for a clean OE-style appearance
- Dual I.D. hose design with 2 1/2 in. end 1 and 3 in. end 2
- Curved radiator hose profile for formed routing
- Built to SAE J20R4 Class D-1 and SAE J1684 Type EC standards
- Dayco 71009 part number for direct catalog matching
Detailed Description
Dayco 71009 is a radiator coolant hose designed around a dual inside diameter layout, making it suitable for cooling system connections that transition between 2 1/2-inch and 3-inch hose ends. The EPDM rubber construction is commonly used in coolant service because it handles heat and fluid exposure associated with radiator and engine cooling circuits. As part of the Dayco Curved Radiator Hose line, this hose follows a formed shape that supports proper routing in tighter engine compartments and heavy-duty cooling layouts.
For buyers searching for a Dayco 71009 radiator hose, curved coolant hose, or dual I.D. radiator hose for Navistar truck cooling system repair, this part provides a specification-based replacement option. It also cross-references ACDelco 22151M and Gates 21291 for the same application.
Common Cooling System Issues It Can Address
- Cracked or split radiator hose material
- Coolant leaks at a worn hose connection
- Improper hose routing from a collapsed or misshaped hose
- Replacement needs for a dual I.D. coolant hose connection
- Service on a Navistar cooling system hose application
Installation Notes and Tips
Verify the hose end diameters before installation: 2 1/2 inches on one end and 3 inches on the other. Confirm the routing path, clamp locations, and clearance around nearby components before securing the hose. Because this hose does not include a heat shield or protective sleeve, inspect surrounding heat sources and abrasion points during installation. For vehicle-specific searches, confirm the exact cooling system layout on the intended Navistar truck or other make/model application before ordering.
Quality Assurance
This Dayco radiator coolant hose is manufactured to SAE J20R4 Class D-1 and SAE J1684 Type EC specifications, supporting standardized coolant hose performance requirements. The EPDM material and formed curved design reflect a specification-driven replacement part for cooling system maintenance.
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