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Gates 18815 HVAC Heater Hose - Heater To Engine or Heater To Pipe-1
Gates Molded Heater Hose 18815 Overview
The Gates 18815 molded heater hose is an OEM-style coolant hose built for tight engine bays where a straight hose will not route correctly. Made from EPDM, it is formed to match the factory shape for reliable coolant, water, and air transfer in the heater circuit.
Compatible with 1987-1989 Dodge Ram 50 heater to engine and 1987-1989 Mitsubishi Mighty Max heater to pipe-1 applications, this molded heater hose supports direct-fit service on compact truck cooling systems. The Gates Molded Heater Hose line focuses on factory-shaped routing for vehicles with limited clearance.
Key Features
- Gates part number 18815
- OEM-style molded heater hose for factory routing
- EPDM construction for coolant-system use
- End I.D.: 0.62 in. / 16 mm
- Centerline length: 9.9 in. / 251 mm
- Fits heater, coolant, water, and air applications
- Approved for marine applications
Product Details
This molded heater hose is shaped to follow the original hose path in smaller, tighter engine compartments, helping maintain proper routing and clearance. Gates 18815 is a direct replacement style hose for the 1987-1989 Dodge Ram 50 and 1987-1989 Mitsubishi Mighty Max where the factory layout requires a molded connection between the heater circuit and engine or pipe connection. This part cross-references Dayco 87672 and Continental 63285 for the same application.
Common Problems This Hose Can Address
- Cracked or leaking heater hose at a molded bend
- Poor hose routing in a confined engine compartment
- Restricted coolant flow from a deteriorated hose
- Improper fitment from a straight universal hose
- Heat-related hose hardening or collapse
Installation Notes and Tips
Verify end diameters and centerline length before installation to confirm routing match. Inspect adjoining heater pipes, clamps, and fittings for wear or corrosion before transferring the new hose into service. Confirm the hose follows the original molded path without twist or kinking, especially on Dodge Ram 50 and Mitsubishi Mighty Max heater connections.
Quality Assurance
Gates molded hoses are built to OE-style dimensions and formed for factory routing in compact engine bays. The EPDM construction and molded profile support consistent fitment for the specified applications.
| Brand | Gates |
|---|---|
| Part Number | 18815 |
| Position | Molded Heater Hose, Heater To Engine |
| 0 | |
| Yes | |
| Branch Quantity | 0 |
| Centerline Length | 9.9 |
| Centerline Length | 251 |
| Centerline Length (in) | 9.9 |
| Centerline Length (mm) | 251 |
| End 1 Inside Diameter | .62 |
| End 1 Inside Diameter | 16 |
| End 2 Inside Diameter | .62 |
| End 2 Inside Diameter | 16 |
| Material | EPDM |
| Molded | Yes |
| Number of Quick Connect Fittings | 0 |
This part fits 6 vehicles. Search below:
| Year | Make | Model | Liters | Cylinders | Fuel Type | Position | Notes |
|---|---|---|---|---|---|---|---|
| 1989 | Dodge | Ram 50 | 2.6L | L4 | GAS | Heater To Engine | Molded Heater Hose |
| 1989 | Mitsubishi | Mighty Max | 2.6L | L4 | GAS | Heater To Pipe-1 | Molded Heater Hose |
| 1988 | Dodge | Ram 50 | 2.6L | L4 | GAS | Heater To Engine | Molded Heater Hose |
| 1988 | Mitsubishi | Mighty Max | 2.6L | L4 | GAS | Heater To Pipe-1 | Molded Heater Hose |
| 1987 | Dodge | Ram 50 | 2.6L | L4 | GAS | Heater To Engine | Molded Heater Hose |
| 1987 | Mitsubishi | Mighty Max | 2.6L | L4 | GAS | Heater To Pipe-1 | Molded Heater Hose |
* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
This part directly replaces or is cross-referenced with the following part numbers:
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.