Dayco 72242 Radiator Coolant Hose - Lower

Dayco Curved Radiator Hose for Jeep TJ and Wrangler

The Dayco 72242 is a curved radiator coolant hose built for lower cooling-system routing on select Jeep applications. Made from EPDM and finished in black, it uses a dual I.D. hose design to match the different connection sizes required by the vehicle’s cooling layout.

Compatible with 1997-2006 Jeep TJ and 1997-2006 Jeep Wrangler lower radiator hose applications, this hose is shaped for the engine bay routing used on these models. The Dayco Curved Radiator Hose line focuses on application-specific fitment for cooling system service, and part number 72242 is listed for the same lower hose position.

Key Features

• EPDM construction for coolant-system durability
• Black finish for a clean OE-style appearance
• Dual I.D. hose design with 1 1/2 in. and 1 25/32 in. end inside diameters
• Curved radiator hose profile for lower routing
• Built to SAE J20R4 Class D-1 and SAE J1684 Type EC specifications
• Fits 1997-2006 Jeep TJ, lower
• Fits 1997-2006 Jeep Wrangler, lower

Detailed Description

Dayco 72242 is a radiator coolant hose for lower-position cooling system service on Jeep TJ and Jeep Wrangler models from 1997 through 2006. The EPDM rubber construction is suited for coolant exposure and everyday engine-bay heat, while the curved shape supports the factory hose path. With dual inside diameters, this hose is matched to the connection sizes used in the application.

This part cross-references Gates 22900 for the same application. If you are replacing a worn, cracked, or leaking lower radiator hose on a Jeep TJ or Jeep Wrangler, Dayco 72242 provides a direct-fit service part for the specified cooling system route.

Common Problems This Hose Can Address

• Coolant leaks from a cracked or aged lower radiator hose
• Softening, swelling, or collapse of the hose under heat and pressure
• Improper hose routing after a previous repair
• Cooling-system service on a Jeep TJ or Jeep Wrangler lower hose connection
• Loss of coolant caused by deterioration at the hose ends

Installation Notes and Tips

Verify the lower hose routing and both end diameters before installation. Inspect the radiator neck, engine connection, and clamps for corrosion or wear, and replace damaged components as needed. Drain the cooling system safely, transfer the hose into the factory path, and confirm there is no contact with moving or hot engine components after installation.

Quality Assurance

Dayco manufactures cooling-system hoses to meet published SAE specifications, including SAE J20R4 Class D-1 and SAE J1684 Type EC for this part.