Dayco 73138 Radiator Coolant Hose - Upper

Curved Upper Radiator Hose for Ford, Mercury, and Mazda

Dayco 73138 is a curved upper radiator coolant hose built from EPDM for reliable coolant routing in select Ford Escape, Mercury Mariner, and Mazda Tribute applications. Its single I.D. hose design and matched end diameters support a direct-fit replacement for the upper cooling circuit.

Key Features

• EPDM construction for coolant-system durability
• Black finish for a clean OE-style appearance
• Single I.D. hose design
• 1 1/4 in. inside diameter at both ends
• 1 21/32 in. outside diameter at both ends
• Built to SAE J20R4 Class D-1 and SAE J1684 Type EC specifications
• Curved radiator hose profile for upper hose routing

Product Details

Dayco Curved Radiator Hose 73138 is engineered as an upper radiator coolant hose for 2009-2012 Ford Escape, 2009-2011 Mercury Mariner, and 2009-2010 Mazda Tribute. The EPDM rubber construction is suited for cooling-system service, while the curved shape helps match the factory hose path in the upper position. Dayco 73138 is a practical replacement when servicing a leaking, cracked, or heat-aged upper hose on these vehicles.

The Dayco Curved Radiator Hose line focuses on application-specific hose geometry and OE-style fitment. For buyers searching for a 2009-2012 Ford Escape upper radiator hose, 2009-2011 Mercury Mariner curved coolant hose, or 2009-2010 Mazda Tribute upper hose, this part number provides a direct reference point: 73138.

What It Helps Address

• Coolant leaks from a split or deteriorated upper radiator hose
• Softening, swelling, or cracking in an aging EPDM hose
• Improper hose routing caused by a misshaped replacement hose
• Loss of cooling-system pressure from a worn hose connection
• Overheating concerns related to restricted coolant flow

Installation Notes and Tips

Verify the upper hose routing and end diameters before installation. Inspect the radiator neck, engine connection points, and clamps for wear or corrosion, and replace any damaged sealing surfaces before fitting the new hose. Confirm vehicle application by year, make, model, and upper position for Ford Escape, Mercury Mariner, or Mazda Tribute.

Quality Assurance

This hose is manufactured to SAE J20R4 Class D-1 and SAE J1684 Type EC specifications for cooling-system hose applications. Dayco 73138 is identified for the listed upper radiator hose fitments and is built to meet the dimensional and material requirements shown in the product data.