OE Quality
60-Day Returns

Dayco 71646 Radiator Coolant Hose - Lower, Lower - Pipe To Engine or Lower - Pipe To Radiator
Overview of Dayco Curved Radiator Hose 71646
The Dayco Curved Radiator Hose 71646 is designed specifically for Chevrolet Corvette models, providing reliable coolant flow and engine temperature regulation. Constructed from durable EPDM material, this dual inside diameter hose ensures a precise fit and long-lasting performance.
- Made from high-quality EPDM rubber for heat and chemical resistance
- Dual inside diameter design: 1 9/32 inches on one end and 1 21/32 inches on the other
- Black color for standard OEM appearance
- Meets SAE J20R4 Class D-1 and SAE J1684 Type EC specifications
- Trunk height of 19 inches for proper routing in engine bay
- Compatible with Chevrolet Corvette models
Detailed Product Description
The Dayco Curved Radiator Hose 71646 is engineered to meet the demanding requirements of radiator coolant systems in Chevrolet Corvette vehicles. Its EPDM construction offers excellent resistance to heat, ozone, and coolant chemicals, ensuring durability under typical engine operating conditions. The hose features a dual inside diameter design, with one end measuring 1 9/32 inches and the other 1 21/32 inches, allowing for a secure and leak-free connection between different radiator components. This hose does not include a heat shield or protective sleeve, focusing on a straightforward, reliable design that meets SAE J20R4 Class D-1 and SAE J1684 Type EC standards for coolant hoses.
About the Curved Radiator Hose Product Line
Dayco's Curved Radiator Hose line is tailored to provide precise fitment and reliable coolant flow for specific vehicle applications. This product line emphasizes quality materials and adherence to SAE specifications, ensuring compatibility and performance in demanding cooling system environments. The 71646 part number is part of this line, designed to meet the exacting requirements of Chevrolet Corvette radiator systems.
Common Applications and Problem Solving
- Replacement of worn or cracked radiator coolant hoses in Chevrolet Corvette vehicles
- Prevention of coolant leaks caused by hose degradation or improper fit
- Maintaining optimal engine temperature by ensuring proper coolant circulation
- Addressing hose swelling or softening due to heat exposure
- Resolving coolant system pressure loss related to damaged hoses
Installation Notes and Tips
When installing the Dayco Curved Radiator Hose 71646, ensure the hose is routed correctly to avoid kinks or contact with moving engine parts. Verify that the dual inside diameters match the radiator and engine fittings for a secure seal. Use appropriate clamps tightened to manufacturer specifications to prevent leaks. Inspect the cooling system for any additional wear or damage during installation.
Quality Assurance and Warranty
Dayco manufactures the Curved Radiator Hose 71646 to meet SAE standards, ensuring consistent quality and performance. While specific warranty details are not provided, Dayco products typically adhere to industry quality controls and are designed for durability in automotive cooling systems.
| Brand | Dayco |
|---|---|
| Part Number | 71646 |
| Position | Curved Radiator Hose, Lower - Pipe To Engine, Lower - Pipe To Radiator, and Lower |
| Material | Epdm |
| Color | Black |
| End 1 Inside Diameter | 1 9/32 |
| End 2 Inside Diameter | 1 21/32 |
| 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 | 19 |
This part fits 8 vehicles. Search below:
| Year | Make | Model | Liters | Cylinders | Position | Notes |
|---|---|---|---|---|---|---|
| 1996 | Chevrolet | Corvette | 5.7L | V8 | Lower | Curved Radiator Hose |
| 1995 | Chevrolet | Corvette | 5.7L | V8 | Lower | Curved Radiator Hose |
| 1994 | Chevrolet | Corvette | 5.7L | V8 | Lower - Pipe To Engine | Curved Radiator Hose |
| 1994 | Chevrolet | Corvette | 5.7L | V8 | Lower - Pipe To Radiator | Curved Radiator Hose |
| 1993 | Chevrolet | Corvette | 5.7L | V8 | Lower - Pipe To Engine | Curved Radiator Hose |
| 1993 | Chevrolet | Corvette | 5.7L | V8 | Lower - Pipe To Radiator | Curved Radiator Hose |
| 1992 | Chevrolet | Corvette | 5.7L | V8 | Lower - Pipe To Engine | Curved Radiator Hose |
| 1992 | Chevrolet | Corvette | 5.7L | V8 | Lower - Pipe To Radiator | Curved Radiator Hose |
* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
This part directly replaces or is cross-referenced with the following part numbers:
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.