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Dayco 70446 Radiator Coolant Hose - Upper
| Brand | Dayco 70446 |
|---|---|
| Position | Upper |
| Material | Epdm |
| Color | Black |
| End 1 Inside Diameter | 1 3/4 |
| End 2 Inside Diameter | 1 3/4 |
| Contains Heat Shield | N |
| Contains Protective Sleeve | N |
| Hose Type | Single i.d. hose |
| SAE Specification | Sae j20r4 class d-1, sae j1684 type ec |
| Trunk Height | 9 |
| Product line | Curved Radiator Hose |
| Fits | Mercury · 2 vehicles |
Curved hose design. Helps route coolant smoothly through the system.
EPDM construction. Resists heat and coolant exposure for dependable service.
Single I.D. hose. Uniform inside diameter supports consistent flow.
Cross-references ACDelco 20029S, CARQUEST 20505 and Duralast B70446 for the same application. See all 20.
Dayco 70446 Curved Radiator Hose Overview
The Dayco 70446 curved radiator hose is a radiator coolant hose built from EPDM for dependable coolant transfer in the engine cooling system. It is a black, single I.D. hose with 1 3/4-inch inside diameter ends and a curved profile that matches the routing needed for select classic Ford applications.
Compatible with 1966 Mercury Colony Park upper radiator hose applications and 1966 Mercury Marauder upper radiator hose applications, this hose supports direct replacement service for vehicles that need a formed coolant hose with the correct bend and diameter. The Dayco 70446 is also a fitment-based replacement for several OE and aftermarket cross-reference numbers.
Key Features
- EPDM construction for cooling-system hose service
- Black curved radiator hose with a single I.D. hose design
- 1 3/4-inch inside diameter at both ends
- Upper radiator hose application for select 1966 Mercury models
- Built to SAE J20R4 Class D-1 and SAE J1684 Type EC specifications
- Cross-references to common OE and aftermarket part numbers
Detailed Description
Dayco Curved Radiator Hose 70446 is a formed coolant hose engineered for upper radiator routing where a straight hose will not follow the factory path cleanly. The EPDM rubber construction is suited to coolant exposure and underhood temperature conditions, while the curved shape helps maintain proper hose alignment in the cooling circuit. This part is a direct-fit style replacement for 1966 Mercury Colony Park, upper, and 1966 Mercury Marauder, upper.
This part cross-references Ford C4AA-8260-A and Gates 20505 for the same application. If you are searching for a Dayco 70446 radiator hose for a 1966 Mercury Colony Park upper hose or a 1966 Mercury Marauder upper hose, this part number is the key identifier to verify before ordering.
Common Problems This Hose Can Address
- Cracked or hardened upper radiator hose material
- Coolant leaks at the hose body or connection points
- Incorrect hose shape that prevents proper routing
- Softening or swelling from age and heat cycling
- Replacement needs for a worn Dayco 70446-style cooling hose
Installation Notes and Tips
Verify the hose routing, end diameter, and formed shape against the original part before installation. Confirm that the hose is used in the upper radiator position on the vehicle and inspect the mating necks for corrosion, scale, or damage that could affect sealing. Replace coolant as needed after service and check the system for leaks once the engine reaches operating temperature.
Quality Assurance
This Dayco curved radiator hose is manufactured to SAE J20R4 Class D-1 and SAE J1684 Type EC requirements, providing a specification-based replacement option for cooling-system service.
| Year | Make | Model | Liters | Cylinders | Position | Notes |
|---|---|---|---|---|---|---|
| 1966 | Mercury | Colony Park | 6.4L | V8 | Upper | Curved Radiator Hose |
| 1966 | Mercury | Marauder | 6.4L | V8 | Upper | Curved Radiator Hose |
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