Gates 23430 Radiator Coolant Hose - Upper

Gates 23430 Molded Coolant Hose

The Gates 23430 molded coolant hose is an OE-style radiator coolant hose built for upper cooling system service. Made from EPDM and formed to match the original routing, it supports a clean, direct replacement for select Cadillac applications.

Compatible with 2008-2011 Cadillac STS upper coolant hose service and 2008-2009 Cadillac CTS upper coolant hose service, this molded hose helps restore proper coolant flow without the need to adapt a universal hose. Gates Molded Coolant Hose line is built around OEM-quality specifications for radiator, heater, bypass, and other coolant routing needs.

Key Features

• Brand: Gates Molded Coolant Hose
• Part number: 23430
• EPDM construction for coolant system durability
• Molded shape for factory-style routing
• End 1 inside diameter: 1.31 in. (33 mm)
• End 2 inside diameter: 1.53 in. (39 mm)
• Centerline length: 16.8 in. (427 mm)
• No spring, no branch, no quick-connect fittings

Detailed Description

Gates 23430 is a molded radiator coolant hose engineered for upper hose applications where the original hose follows a specific bend and length. The EPDM rubber construction is suited for coolant exposure and everyday thermal cycling, while the molded profile helps maintain the intended hose path in the engine bay. If you are replacing a worn upper coolant hose on a Cadillac CTS or Cadillac STS, this part number 23430 provides a direct replacement format that matches the listed fitment.

This Gates molded coolant hose line is focused on replacement applications that call for OE-style dimensions and routing. For buyers searching for a 2008-2011 Cadillac STS upper radiator hose or a 2008-2009 Cadillac CTS upper coolant hose, Gates 23430 is the relevant service part to compare against the original hose shape and connection sizes.

This part cross-references Dayco 72572 for the same application.

Common Problems It Can Help Address

• Cracked or softened upper radiator hose material
• Coolant seepage at aged hose connections
• Improper hose routing from a previous repair
• Restricted coolant flow caused by hose collapse or deformation
• Fitment issues from using a universal hose in a molded application

Installation Notes and Tips

Confirm the hose routing, end diameters, and centerline length against the original part before installation. Inspect the mating necks, clamps, and nearby cooling system components for wear or corrosion, and replace any damaged sealing surfaces before filling the system. After installation, refill and bleed the cooling system according to the vehicle service procedure to remove trapped air.

Quality Assurance

Gates manufactures this molded coolant hose to OEM-quality specifications for replacement cooling system service. The Gates Molded Coolant Hose product line is built to cover upper, lower, bypass, heater, and other coolant applications with application-specific fitment.