Dayco 72137 Radiator Coolant Hose - Lower

Curved Radiator Hose for GM Vans

Dayco 72137 is a curved radiator coolant hose built for lower cooling-system routing on select Chevrolet Express and GMC Savana vans. It uses EPDM construction with a protective sleeve to help manage underhood wear in demanding service conditions.

Key Features

• EPDM rubber construction for coolant hose service
• Dual I.D. hose design with 1 1/2 in. end 1 inside diameter and 1 3/4 in. end 2 inside diameter
• Protective sleeve included for added abrasion resistance
• Black finish for a clean OE-style appearance
• Built to SAE J20R4 Class D-1 and SAE J1684 Type EC specifications
• Curved radiator hose profile for lower hose routing

Product Details

Dayco Curved Radiator Hose 72137 is engineered as a lower radiator coolant hose for 2000-2002 Chevrolet Express 1500, 2000-2002 Chevrolet Express 2500, 2000-2002 GMC Savana 1500, and 2000-2002 GMC Savana 2500. The dual inside diameter design supports the transition between different connection sizes, while the EPDM material is selected for coolant-system use. This part cross-references Gates 22426 for the same application.

For buyers searching for a 2000-2002 Chevrolet Express 1500 lower radiator hose, a 2000-2002 Chevrolet Express 2500 curved coolant hose, or a 2000-2002 GMC Savana 2500 lower hose, Dayco 72137 provides a direct-fit replacement option. The Dayco curved radiator hose line is focused on shaped hoses that follow factory routing and connection geometry for specific vehicle applications.

Common Problems This Hose Can Address

• Coolant leaks from a cracked or aged lower radiator hose
• Softening, swelling, or hose collapse from heat and pressure exposure
• Chafing where the hose routes near adjacent components
• Incorrect fitment when replacing a curved lower hose with a generic hose
• Cooling-system service needs on aging Chevrolet Express and GMC Savana vans

Installation Notes and Tips

Verify the hose routing, end diameters, and lower-position application before installation. Inspect the radiator neck, engine connection points, and clamps for wear or corrosion, and replace any damaged sealing surfaces before installing the new hose. Confirm that the protective sleeve is positioned to match the original routing and avoid contact with nearby heat or abrasion points.

Quality Assurance

Dayco manufactures cooling-system hoses to published SAE specifications, including SAE J20R4 Class D-1 and SAE J1684 Type EC, to support consistent material and dimensional standards for radiator hose service.