Bleeding And Filling Cooling System With Vacuum Filler: The Best Method to Ensure an Air-Free System

by parker
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Welcome to Barbour’s Auto Help, where we provide expert advice and tips for all your automotive needs. In today’s video, we will be discussing the most effective method for filling and bleeding a cooling system using a cooling system vacuum filler. This method ensures that 100% of the air is removed from the system, making it the best way to avoid any potential issues down the line.

Before we dive into the details, it’s important to note that while this method is highly recommended, it is crucial to follow the instructions provided in your repair manual. Always prioritize the manufacturer’s guidelines above anything else to ensure the best results.

First and foremost, it is essential to work with a cool and depressurized cooling system. This typically applies when you have already performed some maintenance or repair work that involves draining the coolant. Exercise caution when removing the radiator cap, ensuring that the engine is cool and using a wet rag if necessary to prevent any mishaps.

To begin the process of filling and bleeding the cooling system, we will be using an air lift or vacuum filler. This device consists of a cone with a gauge that is placed inside the coolant reservoir. A hose is then connected to the device, running along the outside of the vehicle and pointing towards the ground. Finally, an air hose is attached to the other end of the device.

Before applying any vacuum, ensure that the valve is shut to prevent air from entering the system. Once the air hose is connected and turned on, open the valve to start the vacuum process. The needle on the gauge will start to drop as the vacuum pulls out any remaining air from the system. It is normal for the coolant hoses to collapse due to the vacuum pressure.

Once the needle reaches around 25 or falls within the green zone, close the valve to secure the vacuum. If the needle continues to drop, it may indicate a leak in the system. Double-check any recent repairs, such as water pump or coolant hose replacements, to ensure everything is tightly secured. It is necessary to address any leaks before proceeding.

After allowing the system to sit for a minute or two without any further drop in pressure, you can disconnect the outer apparatus while leaving the cone inside the coolant reservoir. The next step involves using a hose specifically designed for filling the coolant. One end of the hose is connected to the gallon of coolant, while the other end is connected to the head of the vacuum filler. The valve is then opened, and coolant is immediately sucked into the cooling system.

Keep a close eye on the coolant level in the jug, ensuring it doesn’t reach the bottom of the jug and start sucking in air. Once the coolant level is near the bottom, shut off the valve and refill the jug with water. It is recommended to use water instead of expensive coolant initially, especially if there is a drop in pressure. Pressure test the system using water to locate any potential leaks and make the necessary repairs. Once the system is free of leaks, it can be filled correctly with the recommended coolant.

Before removing the hose from the jug, it is important to close the valve to maintain the vacuum in the system. After refilling the jug with water, open the valve again to chase the coolant with plain water. As the pressure decreases rapidly, it indicates that the system is almost full. Have extra water on hand in case more is needed to achieve the desired levels. Although it may affect the coolant mixture, it is important to ensure the system is filled adequately.

Finally, disconnect all hoses and connections, and securely place the radiator or coolant cap back on. Congratulations! You have successfully filled and bled your cooling system using a vacuum filler, ensuring that your system is free of any trapped air.

Thank you for watching this tutorial. If you have any questions or need further clarification, please don’t hesitate to comment down below. We also encourage you to read the entire video description, as well as the disclaimer provided at the end. Remember to like and subscribe to our channel for more automotive tips and advice.

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