How to Change the Coolant - A Step-By-Step Guide

How to Change The Coolant - A Step-By-Step Guide

Understanding the Importance of Changing Car Coolant

The car’s cooling system is crucial in preserving ideal engine performance and avoiding overheating. Coolant, often known as antifreeze, circulates within this essential system to remove excess heat and protect the engine from damage. But over time, coolant can deteriorate, losing efficiency and picking up dirt and corrosion. This deterioration can result in decreased cooling effectiveness and ultimately jeopardise the health of the engine as a whole.

The coolant must be changed regularly to maintain a properly functioning cooling system, prevent the engine from overheating, and increase the car’s lifespan. This step-by-step manual will give you the necessary information to do this vital maintenance activity successfully.

Gather Your Supplies: Essential Tools and Coolant Types

Before embarking on changing your car’s coolant, gathering the necessary supplies is crucial to ensure a smooth and successful operation.
Here are the supplies needed for changing your car’s coolant, listed point-wise:

1. Safety gear

  • Wear safety gloves to prevent your hands from coming into touch with coolant and other chemicals
  • To protect your eyes from potential splashes or spills, use safety goggles.

2. Drain Pan:

  • A sizable container or drain pan to catch the used coolant as the system is being drained.

3. Funnel

  • A funnel with a large opening to make it easier to refill the system with new coolant without spills.

4. Newspaper or rags

  • To keep your workspace tidy by wiping away any spills or drips.

5. Coolant:

Pick the right kind of coolant based on the requirements of your car. Typical types are:

  • Green coolant made of ethylene glycol
  • Orange Dex-Cool (often seen in more recent automobiles)
  • Hybrid Organic Acid Technology, or Pink HOAT

6. Distilled water

  • It could be necessary to blend some coolants with distilled water. For instructions, see the label on the coolant.

7. Jack and Jack Stands

  • It may be necessary to safely elevate the automobile using a jack, and jack stands if reaching the radiator drain plug or coolant reservoir is difficult.

It will be easier to complete the coolant replacement and ensure you have everything you need to do it safely and correctly if you have these things ready before you begin.

The Process

Step 1: Safety First – Precautions Before You Begin

Changing your car’s coolant demands careful attention to safety to avoid mishaps and injuries. Take the following safety measures before beginning the task:

  1. Park on Level Ground: To maintain stability throughout the procedure, park your car on a flat, level area.
  2. Allow the Engine to Cool: While operating, coolant can reach high temperatures that might result in burns.
  3. Consult the owner’s manual: Learn about the recommended coolant type and the directions for replacing the coolant in your car.
  4. Wear safety gear: Protect your hands and eyes from coolant and debris by donning safety gloves and goggles.
  5. Release Pressure: Release pressure from the cooling system before opening the radiator cap or coolant reservoir.
  6. Cold Engine: Check that the engine is hard to reduce the chance that hot coolant will spray out when the radiator or reservoir is opened.
  7. Set Up a Drain Pan: Place a drain pan underneath the radiator drain plug or coolant reservoir to catch the used coolant drained from the system.

Step 2: Locate the Coolant Reservoir and Draining Points

Find the coolant reservoir and the draining points in your vehicle’s cooling system before starting the coolant change. The coolant reservoir is often a clear plastic container with “coolant” or “antifreeze” written on it that is situated next to the radiator. If you’re unclear of its precise placement, see your car’s manual.

Depending on the make and type of the car, the draining points can change. At the bottom of the radiator, there is typically a drain plug or valve. Some automobiles also have an engine block drain plug. These points must be identified for the coolant replacement operation to be successful.

Step 3: Draining the Old Coolant Safely and Properly.

A crucial stage in the coolant replacement procedure is draining the old coolant. First, place the drain pan beneath the radiator drain plug or coolant reservoir to capture the coolant. Open the radiator cap carefully (and only after the engine has cooled) to release pressure and allow for adequate draining.

The coolant should then flow into the drain pan by releasing the radiator drain stopper or opening the drain valve. Remove the drain plug if there is one on the engine block. Ensure the old coolant is disposed of responsibly and safely, adhering to local laws. The old coolant must be drained entirely to replace it successfully.

Step 4: Flushing the Cooling System for Optimal Results

A critical step to remove any lingering impurities and debris from the cooling system is to flush it. Close all drain plugs and valves after draining the old coolant. As the manufacturer directs, fill the system with water and a commercial cooling system flush solution. To distribute the solution throughout the system, run the engine while the heater is on.

Let the engine cool before removing the drain plugs and draining the flush solution. Continue doing this until the drained solution looks clear. Flushing makes ensuring that the cooling system is effective and clean, enabling the introduction of new coolants and improving overall efficiency.

Step 5: Choosing the Right Coolant and Refilling the System

Choosing the appropriate coolant for your car is essential in this phase. To choose a suitable coolant, such as green ethylene glycol-based, orange Dex-Cool, or pink HOAT coolant, contact your car’s manual or an automotive professional. Once you have the necessary coolant, gently pour it into the coolant reservoir using a funnel, making sure to fill it to the proper level.

Follow the manufacturer’s instructions and combine the coolant with distilled water if necessary. Avoid spilling and overfilling the reservoir. The suitable coolant should be properly refilled into the cooling system to provide adequate heat dissipation and protect your engine from any cooling-related problems.

Step 6: Burping the System – Removing Air Pockets

After adding coolant to the cooling system again, air pockets might appear and reduce the system’s effectiveness. Start the engine and let it run until it reaches the operating temperature to take care of this. Throughout this procedure, keep an eye on the coolant reservoir’s level. Air bubbles may escape from the engine when it warms up, decreasing the coolant level.

Gently squeeze the upper radiator hoses to promote air escape and remove air pockets. Be careful around hot parts, and make sure the reservoir is filled to the correct amount. Burping the system improves cooling efficiency and guards against any overheating problems.

Step 7: Double-Checking for Leaks and Proper Fill Levels

After you’ve finished changing the coolant, giving everything a close look is crucial. Around the engine block, hoses, and radiator, look for any indications of leaks. The loss of coolant and subsequent engine overheating are both consequences of a leaking cooling system. Recheck the coolant reservoir to make sure it is filled to the proper level.

Retighten any connections as required and make any necessary modifications. Ensuring the cooling system is operating effectively, maintaining engine health, and avoiding potential cooling-related issues on your next trip requires double-checking for leaks and confirming the correct coolant fill level.


By meticulously following this step-by-step guide to changing your car’s coolant, you can rest assured that your vehicle’s cooling system will function optimally. Regular maintenance, using the right coolant, and a longer lifespan all contribute to an engine that runs smoothly and efficiently dissipates heat.

Adopting these maintenance procedures will provide you the peace of mind that comes from knowing your car is in great shape and prepared to serve you dependably on your upcoming excursions. Remember to value how crucial a properly maintained cooling system is to a comfortable and joyful driving experience.

Where can you buy Best Auto Spare Parts in Dubai?

Auto Spare Parts are available at different suppliers and dealers of auto spare parts in Dubai. Noorhan is amongst the leading brands that deal with genuine auto spare parts and aftermarket parts for different car brands, including BMW, Mercedes, Audi, Porsche, Honda, Toyota, Nissan, Mazda, Jeep, Ford, and other Japanese, European, American, Korean, luxury cars brand.

If you’re looking to replace your old Auto Spare Parts with high-quality aftermarket parts in Dubai, Noorhan can help you.

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