Gates Quick-Lok Heater Hose Connector
Gates 28501 Quick-Lok Heater Hose Connector Instruction Manual
Model: 28501
Product Overview
The Gates Quick-Lok Heater Hose Connector is engineered for efficient and secure connections in automotive heating and fuel systems. Its unique single-barb design ensures improved sealing for both single and dual inside diameter hoses. This connector is versatile, available in straight, 90-degree elbow, and tee shapes, allowing for various hose configurations.
Constructed from glass-reinforced nylon, it offers robust resistance to common automotive fluids such as coolant additives, gasoline, diesel, oil, and LPG. Designed for durability, it features bulkheads to ensure proper insertion depths and an anti-rotation device to prevent hose twisting. It operates effectively across a wide temperature range and can withstand high working pressures.
Key Features
- Material: Glass-reinforced nylon for chemical resistance.
- Sealing: Unique single-barb design for improved sealing.
- Insertion Depth: Bulkheads ensure proper insertion.
- Stability: Anti-rotation device prevents hose twisting.
- Temperature Range: -40°F to 480°F (-65°C to 250°C).
- Working Pressure: Up to 290 psi.
What's in the Box
- One (1) Gates Quick-Lok Heater Hose Connector (Model 28501)
Setup and Installation
Proper installation is crucial for the performance and longevity of the Gates Quick-Lok Heater Hose Connector. Always ensure the vehicle's engine is cool and the cooling system is depressurized before beginning work. Refer to your vehicle's service manual for specific hose routing and coolant system procedures.
- Preparation:
- Drain the cooling system as per vehicle manufacturer's recommendations.
- Identify the section of the heater hose requiring replacement or connection.
- Ensure the ends of the hoses to be connected are clean, free of debris, and cut squarely.
- Connection:
- Carefully push the hose ends onto the barbed ends of the Quick-Lok connector. The bulkheads on the connector are designed to indicate proper insertion depth.
- Ensure the hose is fully seated past the barb and against the bulkhead for a secure seal.
- The anti-rotation device helps prevent the hose from twisting during installation and operation.
- Securing (if applicable):
- While the single-barb design provides excellent sealing, additional hose clamps may be used for extra security, especially in high-vibration or high-pressure applications, if recommended by the vehicle manufacturer or a qualified technician.
- Refill and Test:
- Refill the cooling system with the appropriate coolant type and bleed any air from the system according to the vehicle manufacturer's instructions.
- Start the engine and allow it to reach operating temperature. Carefully inspect all connections for leaks.

Figure 1: Side view of the Gates Quick-Lok Heater Hose Connector, showing the black nylon body and the light grey quick-lok mechanism.

Figure 2: Angled view of the connector, highlighting the quick-lok release tabs and the barbed hose connection end.

Figure 3: Another angled perspective, showing the overall shape and the robust construction of the connector.

Figure 4: Image illustrating the approximate dimensions of the connector, showing a length of 4.4 inches (11 cm).
Operating Principles
Once properly installed, the Gates Quick-Lok Heater Hose Connector functions as a permanent, leak-resistant connection point within the vehicle's heating or fuel line system. The single-barb design creates a tight seal with the hose's inner diameter, while the glass-reinforced nylon material ensures chemical compatibility and structural integrity under varying temperatures and pressures encountered during vehicle operation.
The quick-lok mechanism is designed for secure engagement and disengagement, facilitating easier installation and potential future servicing compared to traditional clamped connections. Its robust construction is intended to withstand the dynamic environment of an automotive engine bay.
Maintenance
The Gates Quick-Lok Heater Hose Connector is designed to be a maintenance-free component once installed correctly. Regular visual inspection of the connector and surrounding hoses during routine vehicle maintenance is recommended to check for any signs of wear, cracking, or leaks. If any damage or leakage is observed, the connector should be replaced immediately.
Avoid using harsh chemicals or solvents directly on the connector, as this may compromise the integrity of the nylon material. Clean with mild soap and water if necessary.
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Coolant Leak at Connection | Hose not fully seated; damaged hose end; incorrect hose size; damaged connector. | Ensure hose is pushed fully onto the barb and against the bulkhead. Inspect hose ends for damage and trim if necessary. Verify correct hose inner diameter. Replace connector if damaged. |
| Difficulty Installing Hose | Hose end too tight; burrs on hose end. | Apply a small amount of silicone lubricant to the barb. Ensure hose end is clean and smooth. |
| Hose Twisting | Improper installation technique; excessive force during connection. | Ensure the anti-rotation device is properly engaged. Re-install carefully, avoiding twisting the hose. |
If troubleshooting steps do not resolve the issue, consult a qualified automotive technician.
Specifications
| Attribute | Value |
|---|---|
| Brand | Gates |
| Model | Quick-Lok Heater Hose Connector |
| Item Model Number | 28501 |
| Material | Glass-reinforced Nylon |
| Connector Type | Elbow |
| Temperature Range | -40°F to 480°F (-65°C to 250°C) |
| Working Pressure | Up to 290 psi |
| Item Weight | 0.704 ounces |
| Country of Origin | China |
| UPC | 072053297812 |
Warranty Information
Specific warranty details for the Gates 28501 Quick-Lok Heater Hose Connector are not provided in this manual. For information regarding product warranty, please refer to the official Gates website or contact Gates customer support directly. Retain your proof of purchase for any warranty claims.
Support and Contact
For technical assistance, product inquiries, or support, please visit the official Gates website or contact their customer service department. Contact information can typically be found on the Gates corporate website or on the product packaging.
Note: Always ensure you are using genuine Gates parts for optimal performance and safety.