Gates 18124 HVAC Heater Hose

Gates Molded Heater Hose for Tight Engine Bays

The Gates Molded Heater Hose, part number 18124, is a factory-molded coolant hose built for compact engine compartments where a straight hose will not route correctly. Its EPDM construction supports coolant, water, and air service, and the molded shape helps maintain an OE-style path in the engine bay.

Compatible With 1994-1997 Dodge Ram 2500 and 1994-1997 Dodge Ram 3500, this molded heater hose is a direct-fit style replacement for applications that require a precise bend and stable routing. Gates 18124 is also approved for marine applications.

Key Features

• Factory-molded, OE-style hose shape for tighter engine compartments
• EPDM material for heater, coolant, water, and air service
• End 1 inside diameter: 7 mm (.27 in)
• End 2 inside diameter: 7 mm (.27 in)
• Centerline length: 145 mm (5.7 in)
• Molded construction for consistent routing and fit
• Approved for marine applications

Product Details

Gates Molded Heater Hose line products are built around formed hose geometry that matches the routing demands of modern, space-limited engine bays. Part number 18124 uses EPDM rubber and a molded profile to help maintain proper hose alignment where a standard straight hose would be difficult to install cleanly. For Dodge Ram 2500 and Dodge Ram 3500 trucks from 1994-1997, this hose supports heater and coolant circuit service with the dimensions needed for a compact connection path. This part cross-references Bosch 18124 for the same application.

Common Uses

• Replacing a cracked or heat-aged heater hose
• Restoring coolant flow in a leaking hose section
• Correcting routing issues in a tight engine compartment
• Addressing softening, swelling, or hose collapse
• Servicing heater hose connections on 1994-1997 Dodge Ram 2500 and Ram 3500 trucks

Installation Notes and Tips

Verify hose routing, end diameters, and centerline length before installation. Inspect adjoining fittings, clamps, and nearby coolant components for wear or corrosion, and confirm the hose follows the original molded path without twist or kinking. After installation, refill and bleed the cooling system according to the vehicle service procedure.

Quality Assurance

Gates manufactures this molded heater hose as an OE-style replacement part with application-specific shaping and EPDM construction for dependable service in coolant and heater circuits.