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Dayco 70978 Radiator Coolant Hose - Upper
| Brand | Dayco 70978 |
|---|---|
| Position | Upper |
| Material | Epdm |
| Color | Black |
| End 1 Inside Diameter | 1 1/2 |
| End 2 Inside Diameter | 1 3/4 |
| 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 |
| Product line | Curved Radiator Hose |
| Fits | Ford · 7 vehicles |
Curved design. Matches upper cooling-system routing for a cleaner factory-style fit.
Dual I.D. hose. Uses different end diameters to match the connection sizes in the application.
SAE-rated construction. Built to SAE J20R4 Class D-1 and SAE J1684 Type EC standards.
Cross-references ACDelco 22113M, CARQUEST 21045 and Duralast C70978 for the same application. See all 12.
Overview
Dayco 70978 is a curved radiator coolant hose built for upper cooling-system routing on select Ford trucks. It uses EPDM construction and a dual I.D. design to match applications that require different inside diameters at each end.
Compatible With Ford F-100, F-150, F-250, and F-350 applications listed below, this hose is identified by part number 70978 and is suited for direct replacement use in the cooling circuit.
Key Features
- EPDM rubber construction for coolant-hose service
- Dual I.D. hose design with 1 1/2 in. and 1 3/4 in. end diameters
- Curved shape for upper radiator hose routing
- Built to SAE J20R4 Class D-1 and SAE J1684 Type EC specifications
- Black finish for a clean engine-bay appearance
Product Details
Dayco 70978 is a radiator coolant hose for upper-position cooling-system routing on 1978-1979 Ford F-150, 1978-1979 Ford F-250, 1978-1979 Ford F-350, and 1979 Ford F-100 applications. The curved profile helps match the factory hose path, while the dual inside diameters support the different connection sizes required by the listed vehicles. The hose is made from EPDM and built to SAE J20R4 Class D-1 and SAE J1684 Type EC standards. This part cross-references Motorcraft KM1055 and Gates 21045 for the same application. Dayco 70978 is a practical replacement choice when servicing the cooling system on classic Ford truck platforms.
Common Uses
- Replacing a cracked or aged upper radiator hose
- Restoring coolant flow through the cooling system
- Addressing leaks at hose connections
- Replacing a hose with incorrect end diameters
- Servicing a curved upper hose route on classic Ford trucks
Installation Notes
Verify the hose routing and end diameters before installation. Match the curved shape and upper-position application to the existing cooling-system layout on the vehicle. Inspect hose necks and clamps for wear before fitting the new hose.
Quality Assurance
Dayco designs cooling hoses to meet recognized SAE specifications for radiator hose service. Part number 70978 is built for the listed Ford truck applications and follows the dimensional requirements shown above.
| Year | Make | Model | Liters | Cylinders | Position | Notes |
|---|---|---|---|---|---|---|
| 1979 | Ford | F-100 | 7.5L | V8 | Upper | Curved Radiator Hose |
| 1979 | Ford | F-150 | 7.5L | V8 | Upper | Curved Radiator Hose |
| 1979 | Ford | F-250 | 7.5L | V8 | Upper | Curved Radiator Hose |
| 1979 | Ford | F-350 | 7.5L | V8 | Upper | Curved Radiator Hose |
| 1978 | Ford | F-150 | 7.5L | V8 | Upper | Curved Radiator Hose |
| 1978 | Ford | F-250 | 7.5L | V8 | Upper | Curved Radiator Hose |
| 1978 | Ford | F-350 | 7.5L | V8 | Upper | Curved Radiator Hose |
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