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Dayco 70357 Radiator Coolant Hose - Lower
| Brand | Dayco 70357 |
|---|---|
| Position | Lower |
| Color | Black |
| End 1 Inside Diameter | 1 3/4 |
| End 2 Inside Diameter | 1 3/4 |
| Hose Type | Single I.D. Hose |
| Material | EPDM |
| SAE Specification | SAE J20R4 Class D-1, SAE J1684 Type EC |
| Trunk Height | 15 |
| Product line | Curved Radiator Hose |
| Fits | Chevrolet · 21 vehicles |
OE-style replacement. Curved radiator hose for straightforward cooling-system service.
EPDM construction. Resists heat and coolant exposure for dependable hose performance.
Single I.D. hose. Uniform 1 3/4-inch ends for a clean, consistent connection.
Cross-references Duralast C70357, General Motors 3826901 and General Motors 3881857 for the same application. See all 6.
Dayco Curved Radiator Hose 70357
Dayco 70357 is a curved radiator coolant hose built for lower cooling-system routing on select classic Chevrolet applications. Made from EPDM and finished in black, it provides a direct-fit replacement for vehicles that require a 1 3/4 in. inside diameter at both ends.
Key Features
- EPDM construction for coolant-system service
- Black finish for a factory-style appearance
- Single I.D. hose design with 1 3/4 in. inside diameter at both ends
- Curved radiator hose profile for lower hose routing
- Built to SAE J20R4 Class D-1 and SAE J1684 Type EC specifications
- Dayco Curved Radiator Hose line for application-specific cooling hose replacement
Detailed Description
Dayco 70357 is a curved radiator hose engineered for lower radiator connections where the hose must follow a formed path without a heat shield or protective sleeve. The EPDM rubber construction is suited for coolant exposure and temperature cycling, while the SAE J20R4 Class D-1 and SAE J1684 Type EC specifications support proper hose performance in automotive cooling systems. This part cross-references Duralast C70357 for the same application.
Compatible With 1967 Chevrolet El Camino, lower; 1967 Chevrolet Malibu, lower; 1966 Chevrolet El Camino, lower; 1966 Chevrolet Malibu, lower; 1963-1964 Chevrolet Bel Air, lower; and 1963-1964 Chevrolet Impala, lower. Dayco 70357 is a fitment-based replacement for classic Chevrolet cooling systems that require the specified curved lower hose geometry and 1 3/4 in. end diameters.
Common Issues This Hose Can Address
- Cracked or hardened lower radiator hose material
- Coolant leaks at the hose body or connection points
- Incorrect hose shape for curved lower routing
- Replacement needs after age-related rubber deterioration
- Cooling-system service on classic Chevrolet Bel Air, Impala, El Camino, and Malibu models
Installation Notes and Tips
Verify the lower hose routing, end diameters, and vehicle configuration before installation. This hose is listed for 1967 Chevrolet El Camino and Malibu with air conditioning, 1966 Chevrolet El Camino and Malibu with A.C. or A.P. configurations, and 1963-1964 Chevrolet Bel Air and Impala without air conditioning. Inspect the radiator necks and engine-side connections for corrosion or residue before installing the new hose.
Quality Assurance
Dayco 70357 is manufactured to meet SAE J20R4 Class D-1 and SAE J1684 Type EC requirements for radiator coolant hose applications. The Dayco Curved Radiator Hose line is built for application-specific cooling-system replacement where correct fit and material specification matter.
| Year | Make | Model | Liters | Cylinders | Position | Notes |
|---|---|---|---|---|---|---|
| 1967 | Chevrolet | El Camino | 4.6L | V8 | Lower | Compatible with vehicles containing air conditioning.; Curved Radiator Hose |
| 1967 | Chevrolet | El Camino | 5.3L | V8 | Lower | Compatible with vehicles containing air conditioning.; Curved Radiator Hose |
| 1967 | Chevrolet | Malibu | 4.6L | V8 | Lower | Compatible with vehicles containing air conditioning.; Curved Radiator Hose |
| 1967 | Chevrolet | Malibu | 5.3L | V8 | Lower | Compatible with vehicles containing air conditioning.; Curved Radiator Hose |
| 1966 | Chevrolet | El Camino | 4.6L | V8 | Lower | w/A.C., w/o A.P.; Curved Radiator Hose |
| 1966 | Chevrolet | El Camino | 4.6L | V8 | Lower | w/A.P.; Curved Radiator Hose |
| 1966 | Chevrolet | El Camino | 5.3L | V8 | Lower | w/A.C., w/o A.P.; Curved Radiator Hose |
| 1966 | Chevrolet | El Camino | 5.3L | V8 | Lower | w/A.P.; Curved Radiator Hose |
| 1966 | Chevrolet | Malibu | 4.6L | V8 | Lower | w/A.C., w/o A.P.; Curved Radiator Hose |
| 1966 | Chevrolet | Malibu | 4.6L | V8 | Lower | w/A.P.; Curved Radiator Hose |
| 1966 | Chevrolet | Malibu | 5.3L | V8 | Lower | w/A.C., w/o A.P.; Curved Radiator Hose |
| 1966 | Chevrolet | Malibu | 5.3L | V8 | Lower | w/A.P.; Curved Radiator Hose |
| 1964 | Chevrolet | Bel Air | 4.6L | V8 | Lower | Fits vehicles without air conditioning.; Curved Radiator Hose |
| 1964 | Chevrolet | Bel Air | 5.3L | V8 | Lower | Fits vehicles without air conditioning.; Curved Radiator Hose |
| 1964 | Chevrolet | Impala | 5.4L | V8 | Lower | Fits vehicles without air conditioning.; Curved Radiator Hose |
| 1964 | Chevrolet | Impala | 4.6L | V8 | Lower | Fits vehicles without air conditioning.; Curved Radiator Hose |
| 1964 | Chevrolet | Impala | 5.3L | V8 | Lower | Fits vehicles without air conditioning.; Curved Radiator Hose |
| 1963 | Chevrolet | Bel Air | 4.6L | V8 | Lower | Fits vehicles without air conditioning.; Curved Radiator Hose |
| 1963 | Chevrolet | Bel Air | 5.3L | V8 | Lower | Fits vehicles without air conditioning.; Curved Radiator Hose |
| 1963 | Chevrolet | Impala | 4.6L | V8 | Lower | Fits vehicles without air conditioning.; Curved Radiator Hose |
| 1963 | Chevrolet | Impala | 5.3L | V8 | Lower | Fits vehicles without air conditioning.; Curved Radiator Hose |
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