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Dayco 71687 Radiator Coolant Hose - Upper
| Brand | Dayco 71687 |
|---|---|
| Position | Upper |
| Color | Black |
| End 1 Inside Diameter | 1 7/32 |
| End 2 Inside Diameter | 1 7/32 |
| 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 | Mitsubishi, Lincoln, and Acura · 14 vehicles |
Curved radiator hose. Single I.D. hose for a clean, direct coolant connection.
EPDM construction. Resists heat and coolant exposure for dependable service.
SAE J20R4 Class D-1. Built to meet recognized hose performance standards.
Cross-references ACDelco 22305M, ACDelco 22498M and CARQUEST 22131 for the same application. See all 12.
Curved Radiator Hose for OE-Style Cooling Service
Dayco 71687 is a curved radiator coolant hose built from EPDM rubber for reliable coolant transfer in the engine cooling system. It matches the specified 1 7/32-inch inside diameter at both ends and follows SAE J20R4 Class D-1 and SAE J1684 Type EC requirements for this application.
Compatible with select Mitsubishi Endeavor upper radiator hose applications, as well as Lincoln Mark VIII and Acura CL fitments listed below, this Dayco Curved Radiator Hose is shaped for direct replacement use in the cooling circuit.
Key Features
- EPDM construction for coolant hose service
- Black finish for a factory-style appearance
- Single I.D. hose design
- 1 7/32-inch inside diameter at both ends
- Curved radiator hose profile for upper cooling system routing
- Built to SAE J20R4 Class D-1 and SAE J1684 Type EC specifications
- Dayco 71687 radiator coolant hose for listed vehicle applications
Product Details
The Dayco Curved Radiator Hose, part number 71687, is a molded EPDM hose intended for coolant circulation between engine and radiator connections where a curved routing is required. The hose measures 15 inches in trunk height and uses a single inside-diameter configuration, with both ends sized at 1 7/32 inches. This makes it a direct-fit style replacement for the specified upper radiator hose applications on Mitsubishi Endeavor, Lincoln Mark VIII, and Acura CL models.
This part cross-references Gates 22131 for the same application.
Common Cooling System Issues It Can Address
- Cracked or hardened upper radiator hose material
- Coolant seepage at the hose connection points
- Collapsed or weakened hose routing under heat and pressure
- Restricted coolant flow caused by deteriorated hose walls
- Service replacement for a worn Dayco 71687-style radiator hose
Installation Notes and Tips
Verify hose routing, end diameter, and position before installation. Inspect the radiator neck, engine outlet, and clamps for wear or corrosion, and replace any damaged sealing surfaces before fitting the new hose. Confirm the hose follows the original curved path without twisting so coolant flow and clearance are maintained.
Fits 2010-2011 Mitsubishi Endeavor, Upper. Fits 2004-2008 Mitsubishi Endeavor, Upper. Fits 1993-1998 Lincoln Mark VIII, N/A. Fits 1997 Acura CL, Upper.
Quality Assurance
Dayco manufactures this radiator coolant hose to meet the listed SAE specifications for the application. The EPDM construction and molded curved profile support consistent fitment for the vehicles shown above.
| Year | Make | Model | Liters | Cylinders | Position | Notes |
|---|---|---|---|---|---|---|
| 2011 | Mitsubishi | Endeavor | — | — | Upper | Curved Radiator Hose |
| 2010 | Mitsubishi | Endeavor | — | — | Upper | Curved Radiator Hose |
| 2008 | Mitsubishi | Endeavor | — | — | Upper | Curved Radiator Hose |
| 2007 | Mitsubishi | Endeavor | — | — | Upper | Curved Radiator Hose |
| 2006 | Mitsubishi | Endeavor | — | — | Upper | Curved Radiator Hose |
| 2005 | Mitsubishi | Endeavor | — | — | Upper | Curved Radiator Hose |
| 2004 | Mitsubishi | Endeavor | 3.8L | V6 | Upper | Curved Radiator Hose |
| 1998 | Lincoln | Mark VIII | — | — | N/A | Curved Radiator Hose |
| 1997 | Acura | CL | 2.2L | L4 | Upper | Curved Radiator Hose |
| 1997 | Lincoln | Mark VIII | — | — | N/A | Curved Radiator Hose |
| 1996 | Lincoln | Mark VIII | — | — | N/A | Curved Radiator Hose |
| 1995 | Lincoln | Mark VIII | — | — | N/A | Curved Radiator Hose |
| 1994 | Lincoln | Mark VIII | — | — | N/A | Curved Radiator Hose |
| 1993 | Lincoln | Mark VIII | — | — | N/A | Curved Radiator Hose |
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