OE Quality
60-Day Returns

Gates 21758 Radiator Coolant Hose - Lower, Lower - Engine To Pipe or Lower - Pipe To Radiator
Reliable Radiator Coolant Hose for Pontiac Vehicles
The Gates Molded Coolant Hose 21758 is designed to provide a durable and precise fit for select Pontiac models. Engineered with EPDM material, this radiator coolant hose ensures reliable performance and resistance to heat and chemicals in your cooling system.
- Constructed from high-quality EPDM for heat and chemical resistance
- Molded design for exact fit and secure connections
- End 1 inside diameter: 1.25 inches (32 mm)
- End 2 inside diameter: 1.5 inches (38 mm)
- Centerline length: 22.2 inches (564 mm)
- Compatible with Pontiac Fiero, LeMans, and Optima models
- Part number 21758 for precise identification
About the Gates Molded Coolant Hose Product Line
The Molded Coolant Hose line by Gates focuses on delivering hoses that are pre-formed to match specific vehicle cooling system requirements. This eliminates the need for bending or shaping during installation, reducing the risk of leaks or improper fitment. The molded design of part number 21758 ensures consistent performance and durability in Pontiac vehicles.
Detailed Product Description
This radiator coolant hose is made from EPDM, a synthetic rubber known for its excellent resistance to heat, ozone, and automotive fluids. The molded construction provides a precise shape that matches the original equipment specifications for Pontiac Fiero, LeMans, and Optima models. With an end 1 inside diameter of 1.25 inches (32 mm) and an end 2 inside diameter of 1.5 inches (38 mm), along with a centerline length of 22.2 inches (564 mm), this hose is designed to maintain optimal coolant flow and system integrity. The absence of springs and quick connect fittings simplifies the design, focusing on durability and reliability.
Common Applications and Issues Addressed
- Replacement of worn or cracked radiator coolant hoses
- Prevention of coolant leaks due to hose degradation
- Restoring proper coolant flow in Pontiac Fiero, LeMans, and Optima cooling systems
- Eliminating overheating caused by compromised hoses
- Maintaining system pressure and preventing hose collapse
Installation Notes and Tips
Ensure the engine is cool before removing the old hose to avoid burns. Verify that the hose dimensions match the original part, especially the inside diameters and centerline length. The molded design of the Gates 21758 hose allows for straightforward installation without the need for bending or modification. Use appropriate clamps to secure the hose ends and check for leaks after installation.
Quality Assurance and Warranty
Gates Molded Coolant Hose 21758 is manufactured to meet or exceed OEM standards for durability and performance. The EPDM material and molded construction contribute to long service life under normal operating conditions. Please refer to Gates' official warranty policy for specific coverage details.
| Brand | Gates |
| Part Number | 21758 |
| Position | Molded Coolant Hose, Lower - Pipe To Radiator, Lower, and Lower - Engine To Pipe |
| Material | Epdm |
| End 1 Inside Diameter | 1.25 |
| End 1 Inside Diameter | 32 |
| End 2 Inside Diameter | 1.5 |
| End 2 Inside Diameter | 38 |
| Contains Spring | No |
| Centerline Length | 22.2 |
| Centerline Length | 564 |
| Branch Quantity | 0 |
| 9839 | Yes |
| 9845 | 0 |
| Modular Hose | No |
| Molded | Yes |
| Number of Quick Connect Fittings | 0 |
This part fits 6 vehicles. Search below:
| Year | Make | Model | Liters | Cylinders | Fuel Type | Position | Notes |
|---|---|---|---|---|---|---|---|
| 1990 | Pontiac | LeMans | 2.0L | L4 | GAS | Lower - Pipe To Radiator | Radiator and HVAC compatible coolant and heater hose.; Molded Coolant Hose |
| 1990 | Pontiac | Optima | 2.0L | L4 | GAS | Lower | Radiator and HVAC compatible coolant and heater hose.; Molded Coolant Hose |
| 1989 | Pontiac | LeMans | 2.0L | L4 | GAS | Lower - Pipe To Radiator | Radiator and HVAC compatible coolant and heater hose.; Molded Coolant Hose |
| 1989 | Pontiac | Optima | 2.0L | L4 | GAS | Lower | Radiator and HVAC compatible coolant and heater hose.; Molded Coolant Hose |
| 1988 | Pontiac | Fiero | 2.8L | V6 | GAS | Lower - Engine To Pipe | Molded Coolant Hose |
| 1988 | Pontiac | Optima | 2.0L | L4 | GAS | Lower | Cut to fit; Molded Coolant 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.