1. Product Overview
The Gates 23487 Premium Molded Coolant Hose is engineered to meet OEM-quality specifications for various coolant applications, including upper, lower, bypass, and heater hose connections. This hose is designed to provide a reliable replacement solution, ensuring optimal performance of your vehicle's cooling system.

Image: Gates 23487 Premium Molded Coolant Hose, a black, pre-shaped hose designed for vehicle cooling systems.
Key Features:
- Specifically-engineered materials resist collapse under vacuum.
- Engineered to resist electrochemical degradation, the leading cause of hose failure.
- Pre-shaped to fit and to ensure perfectly sealed conditions.
- Constructed with EPDM tube, synthetic fiber knit reinforcement, and a heat-, ozone- and chemical coolant-resistant EPDM cover.
- Meets requirements of SAE 20R4, class D2 and DIN 73411, class A (except for tolerances).
2. Installation Guidelines
Proper installation of the Gates 23487 Premium Molded Coolant Hose is crucial for the optimal performance and longevity of your vehicle's cooling system. It is highly recommended that installation be performed by a qualified automotive technician.
General Steps:
- Ensure the engine is cool before beginning any work on the cooling system.
- Drain the coolant from the system into an appropriate container.
- Carefully remove the old hose, noting its exact routing and connection points.
- Inspect the connection points (e.g., radiator neck, engine block) for corrosion or damage. Clean as necessary.
- Install the new Gates molded coolant hose, ensuring it is correctly oriented and seated firmly at both ends. The pre-shaped design ensures a precise fit.
- Secure the hose with appropriate clamps, ensuring a tight, leak-free seal.
- Refill the cooling system with the manufacturer-recommended coolant, bleeding any air from the system as per vehicle specifications.
- Start the engine and check for leaks, allowing the engine to reach operating temperature to ensure proper coolant circulation and thermostat function.
Always refer to your vehicle's specific service manual for detailed installation instructions and safety precautions.
3. Maintenance
Regular maintenance of your vehicle's cooling system, including coolant hoses, is vital for preventing overheating and ensuring long-term engine health. Coolant hoses are subjected to extreme temperatures, pressure, and vibration, leading to wear over time.
Recommended Maintenance Practices:
- Visual Inspection: Periodically inspect coolant hoses for signs of wear, such as cracks, bulges, hardening, softening, or fraying. Check for any visible leaks around the hose connections.
- Hose Squeeze Test: With the engine cool, squeeze the hoses. They should feel firm but pliable. Hoses that are excessively hard, soft, or spongy may indicate internal degradation and require replacement.
- Coolant Replacement: Follow your vehicle manufacturer's recommendations for coolant flush and replacement intervals. Fresh coolant helps prevent internal corrosion and electrochemical degradation of hoses.
- System Check: During any cooling system service (e.g., water pump replacement, thermostat replacement), it is good practice to replace the upper and lower radiator hoses simultaneously. This proactive approach helps prevent future failures and ensures the entire system is in optimal condition.
- High Mileage Vehicles: For vehicles with high mileage (e.g., 90,000 miles or more), consider a comprehensive cooling system inspection and proactive replacement of hoses, belts, and other critical components as part of preventative maintenance.
4. Troubleshooting
Issues with coolant hoses can lead to significant problems for your vehicle's engine. Recognizing the symptoms of a failing hose can help prevent costly damage.
Common Symptoms of Coolant Hose Failure:
- Coolant Leaks: Visible puddles of coolant (often green, orange, or pink) under your vehicle, especially after it has been parked. Leaks can occur from cracks in the hose or loose/damaged clamps.
- Engine Overheating: A rising temperature gauge on your dashboard, steam coming from under the hood, or a burning smell. A burst or severely leaking hose can cause rapid coolant loss, leading to overheating.
- Swollen or Collapsed Hoses: Hoses that appear swollen or bloated when hot, or collapsed/flattened when cool, indicate internal damage or vacuum issues.
- Hard or Spongy Hoses: Hoses that feel unusually hard or brittle, or excessively soft and spongy, are signs of material degradation.
- Low Coolant Level: Frequent need to top off coolant, even without visible leaks, could indicate a slow leak from a hose or other cooling system component.
If you experience any of these symptoms, it is important to have your vehicle inspected by a professional immediately to diagnose and address the issue.
5. Specifications
| Attribute | Value |
|---|---|
| Brand | Gates |
| Model | Premium Molded Coolant Hose |
| Item Model Number | 23487 |
| Material | EPDM, Synthetic Fiber |
| Color | Black |
| Item Weight | 8 ounces (0.5 Pounds) |
| UPC | 770075391814 |
| Manufacturer | Gates |
| Specific Uses For Product | Vehicle Cooling Systems |
| Country of Origin | USA |
6. Warranty & Support
For specific warranty information regarding your Gates 23487 Premium Molded Coolant Hose, please refer to the documentation included with your purchase or visit the official Gates website. Warranty terms and conditions may vary.
If you require technical support or have questions about the product, please contact Gates customer service or consult with a certified automotive professional.
You can find more information and products from Gates by visiting the Gates Store on Amazon.