OE Quality
60-Day Returns

Dayco 71840 Radiator Coolant Hose - Upper
Overview of Dayco Curved Radiator Hose 71840
The Dayco Curved Radiator Hose 71840 is designed specifically for Ford and Mercury vehicles, including the Sable and Taurus models. This radiator coolant hose features a curved design and is constructed from durable EPDM material to ensure reliable performance in cooling systems.
- Made from EPDM material for heat and chemical resistance
- Black color with a protective sleeve for added durability
- Single inside diameter hose with 1 1/2 inch ends on both sides
- Meets SAE J20R4 Class D-1 and SAE J1684 Type EC specifications
- Compatible with Ford Sable and Taurus, Mercury Sable and Taurus models
Detailed Product Description
The Dayco Curved Radiator Hose 71840 is part of the Curved Radiator Hose product line, which focuses on providing hoses with precise bends to fit specific vehicle cooling system layouts. This hose is made from EPDM, a synthetic rubber known for its excellent resistance to heat, ozone, and coolant chemicals, making it suitable for long-term use in automotive cooling systems. The hose features a black finish and includes a protective sleeve to guard against abrasion and external damage, although it does not contain a heat shield. Both ends of the hose have an inside diameter of 1 1/2 inches, designed as a single inside diameter hose to ensure a secure and leak-free connection.
Applications and Common Issues Addressed
- Replacement of worn or cracked radiator coolant hoses in Ford and Mercury Sable and Taurus vehicles
- Prevention of coolant leaks caused by hose degradation or damage
- Maintaining proper coolant flow to avoid engine overheating
- Addressing hose failures due to abrasion or external wear
- Ensuring compatibility with factory cooling system specifications
Installation Notes and Tips
When installing the Dayco Curved Radiator Hose 71840, ensure the vehicle is cool and the cooling system is depressurized. Verify that the hose ends match the 1 1/2 inch inside diameter fittings on the vehicle. Use appropriate clamps to secure the hose and check for any signs of twisting or kinking during installation. The protective sleeve should be positioned to face areas prone to abrasion. After installation, refill and bleed the cooling system as needed and inspect for leaks during engine warm-up.
Quality Assurance and Warranty
Dayco manufactures the Curved Radiator Hose 71840 to meet SAE J20R4 Class D-1 and SAE J1684 Type EC standards, ensuring compliance with industry requirements for radiator coolant hoses. The use of EPDM material and protective sleeve enhances durability and resistance to common cooling system stresses. Warranty information is provided by Dayco and typically covers defects in material and workmanship; please refer to Dayco's official warranty policy for specific terms.
| Brand | Dayco |
|---|---|
| Part Number | 71840 |
| Position | Curved Radiator Hose, Upper |
| Color | Black |
| Contains Protective Sleeve | Y |
| End 1 Inside Diameter | 1 1/2 |
| End 2 Inside Diameter | 1 1/2 |
| Hose Type | Single I.D. Hose |
| Material | EPDM |
| SAE Specification | SAE J20R4 Class D-1, SAE J1684 Type EC |
| Trunk Height | 18 |
This part fits 22 vehicles. Search below:
| Year | Make | Model | Liters | Cylinders | Position | Notes |
|---|---|---|---|---|---|---|
| 2007 | Ford | Taurus | Upper | Curved Radiator Hose | ||
| 2006 | Ford | Taurus | Upper | Curved Radiator Hose | ||
| 2005 | Ford | Taurus | 3.0L | V6 | Upper | Curved Radiator Hose |
| 2005 | Mercury | Sable | 3.0L | V6 | Upper | Curved Radiator Hose |
| 2004 | Ford | Taurus | 3.0L | V6 | Upper | Curved Radiator Hose |
| 2004 | Mercury | Sable | 3.0L | V6 | Upper | Curved Radiator Hose |
| 2003 | Ford | Taurus | 3.0L | V6 | Upper | Curved Radiator Hose |
| 2003 | Mercury | Sable | 3.0L | V6 | Upper | Curved Radiator Hose |
| 2002 | Ford | Taurus | 3.0L | V6 | Upper | Curved Radiator Hose |
| 2002 | Mercury | Sable | 3.0L | V6 | Upper | Curved Radiator Hose |
| 2001 | Ford | Taurus | 3.0L | V6 | Upper | Curved Radiator Hose |
| 2001 | Mercury | Sable | 3.0L | V6 | Upper | Curved Radiator Hose |
| 2000 | Ford | Taurus | 3.0L | V6 | Upper | Curved Radiator Hose |
| 2000 | Mercury | Sable | 3.0L | V6 | Upper | Curved Radiator Hose |
| 1999 | Ford | Taurus | 3.0L | V6 | Upper | Curved Radiator Hose |
| 1999 | Mercury | Sable | 3.0L | V6 | Upper | Curved Radiator Hose |
| 1998 | Ford | Taurus | 3.0L | V6 | Upper | Curved Radiator Hose |
| 1998 | Mercury | Sable | 3.0L | V6 | Upper | Curved Radiator Hose |
| 1997 | Ford | Taurus | 3.0L | V6 | Upper | Curved Radiator Hose |
| 1997 | Mercury | Sable | 3.0L | V6 | Upper | Curved Radiator Hose |
| 1996 | Ford | Taurus | 3.0L | V6 | Upper | Curved Radiator Hose |
| 1996 | Mercury | Sable | 3.0L | V6 | Upper | 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.