OE Quality
60-Day Returns

Gates 18324 HVAC Heater Hose - Pipe-5 To Reservoir, Reservoir To Pipe-4 or Water Pump To Pipe-3
Reliable HVAC Heater Hose for Buick, Cadillac, Oldsmobile, and Pontiac
The Gates Molded Heater Hose 18324 is engineered to provide dependable heating system performance for select Buick, Cadillac, Oldsmobile, and Pontiac models. Designed with precision and durable EPDM material, this molded heater hose ensures a secure fit and long-lasting operation in your vehicle's HVAC system.
- Constructed from high-quality EPDM material for heat and chemical resistance
- Molded design for exact fit and easy installation
- Centerline length of 13.9 inches (353 mm) for precise compatibility
- Consistent inside diameter of 0.36 inches (9 mm) on both ends
- Compatible with Buick Aurora, Cadillac DeVille, DTS, Lucerne, and Oldsmobile Bonneville models
About the Gates Molded Heater Hose Product Line
The Molded Heater Hose line by Gates focuses on delivering hoses that are pre-formed to match specific vehicle applications. This reduces installation time and ensures a leak-free connection within the HVAC system. The molded construction of part number 18324 provides a reliable replacement hose that maintains the integrity of the heating system in your Buick, Cadillac, Oldsmobile, or Pontiac vehicle.
Product Details and Specifications
This HVAC heater hose features a uniform inside diameter of 0.36 inches (9 mm) on both ends, allowing for consistent coolant flow. The centerline length measures 13.9 inches (353 mm), making it suitable for the designated vehicle models. Made from EPDM, the hose resists heat, ozone, and coolant chemicals, which helps extend service life and maintain system efficiency. The molded design eliminates the need for bending or shaping during installation, ensuring a precise fit.
Common Applications and Problem Solving
- Replacement of worn or cracked heater hoses in Buick Aurora and Cadillac DeVille HVAC systems
- Resolving coolant leaks that cause heating inefficiency in Pontiac Bonneville and Oldsmobile models
- Restoring proper coolant flow in Cadillac DTS and Lucerne heater cores
- Preventing overheating issues related to damaged or deteriorated heater hoses
- Maintaining HVAC system integrity for consistent cabin heating performance
Installation Notes and Tips
Ensure the engine is cool before beginning installation to avoid burns from hot coolant. Verify that the hose routing matches the original configuration to prevent kinks or interference with other components. Use appropriate clamps to secure the hose ends firmly, and inspect all connections for leaks after installation. The molded design of the Gates 18324 heater hose simplifies alignment and reduces installation time.
Quality Assurance and Warranty
Gates manufactures the Molded Heater Hose 18324 to meet or exceed OEM specifications, ensuring reliable performance and durability. The EPDM material and molded construction contribute to long service life under normal operating conditions. While specific warranty details are not provided here, Gates products typically come with a limited warranty against defects in material and workmanship.
| Brand | Gates |
| Part Number | 18324 |
| Position | Molded Heater Hose, Water Pump To Pipe-3, Pipe-5 To Reservoir, and Reservoir To Pipe-4 |
| Material | Epdm |
| End 1 Inside Diameter | .36 |
| End 1 Inside Diameter | 9 |
| End 2 Inside Diameter | .36 |
| End 2 Inside Diameter | 9 |
| Centerline Length | 13.9 |
| Centerline Length | 353 |
| Branch Quantity | 0 |
| 9839 | Yes |
| 9845 | 0 |
| Centerline Length (in) | 13.9 |
| Centerline Length (mm) | 353 |
| Molded | Yes |
| Number of Quick Connect Fittings | 0 |
This part fits 23 vehicles. Search below:
| Year | Make | Model | Liters | Cylinders | Fuel Type | Position | Notes |
|---|---|---|---|---|---|---|---|
| 2011 | Buick | Lucerne | 4.6L | V8 | GAS | Water Pump To Pipe-3 | Molded Heater Hose |
| 2011 | Cadillac | DTS | 4.6L | V8 | GAS | Water Pump To Pipe-3 | Molded Heater Hose |
| 2010 | Buick | Lucerne | 4.6L | V8 | GAS | Water Pump To Pipe-3 | Molded Heater Hose |
| 2010 | Cadillac | DTS | 4.6L | V8 | GAS | Water Pump To Pipe-3 | Molded Heater Hose |
| 2009 | Buick | Lucerne | 4.6L | V8 | GAS | Water Pump To Pipe-3 | Molded Heater Hose |
| 2009 | Cadillac | DTS | 4.6L | V8 | GAS | Water Pump To Pipe-3 | Molded Heater Hose |
| 2008 | Buick | Lucerne | 4.6L | V8 | GAS | Water Pump To Pipe-3 | Molded Heater Hose |
| 2008 | Cadillac | DTS | 4.6L | V8 | GAS | Water Pump To Pipe-3 | Molded Heater Hose |
| 2007 | Buick | Lucerne | 4.6L | V8 | GAS | Water Pump To Pipe-3 | Molded Heater Hose |
| 2007 | Cadillac | DTS | 4.6L | V8 | GAS | Water Pump To Pipe-3 | Molded Heater Hose |
| 2006 | Buick | Lucerne | 4.6L | V8 | GAS | Water Pump To Pipe-3 | Molded Heater Hose |
| 2006 | Cadillac | DTS | 4.6L | V8 | GAS | Water Pump To Pipe-3 | Molded Heater Hose |
| 2005 | Cadillac | DeVille | 4.6L | V8 | GAS | Pipe-5 To Reservoir | Molded Heater Hose |
| 2005 | Pontiac | Bonneville | 4.6L | V8 | GAS | Pipe-5 To Reservoir | Molded Heater Hose |
| 2004 | Cadillac | DeVille | 4.6L | V8 | GAS | Pipe-5 To Reservoir | Molded Heater Hose |
| 2004 | Pontiac | Bonneville | 4.6L | V8 | GAS | Pipe-5 To Reservoir | Molded Heater Hose |
| 2003 | Cadillac | DeVille | 4.6L | V8 | GAS | Pipe-5 To Reservoir | Molded Heater Hose |
| 2003 | Oldsmobile | Aurora | 4.0L | V8 | GAS | Reservoir To Pipe-4 | Molded Heater Hose |
| 2002 | Cadillac | DeVille | 4.6L | V8 | GAS | Pipe-5 To Reservoir | Molded Heater Hose |
| 2002 | Oldsmobile | Aurora | 4.0L | V8 | GAS | Reservoir To Pipe-4 | Molded Heater Hose |
| 2001 | Cadillac | DeVille | 4.6L | V8 | GAS | Reservoir To Pipe-4 | Molded Heater Hose |
| 2001 | Oldsmobile | Aurora | 4.0L | V8 | GAS | Reservoir To Pipe-4 | Molded Heater Hose |
| 2000 | Cadillac | DeVille | 4.6L | V8 | GAS | Reservoir To Pipe-4 | 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.