How To Flush Cooling System With Garden Hose

There is no denying the importance of the cooling system of your vehicles. It ensures the efficiency of the engine. No doubt, if your engine becomes overheated, its overall efficiency will significantly drop. So, it’s necessary to flush the radiator of your vehicle from time to time so that the entire cooling system works properly.

It may seem quite challenging when it comes to flushing the entire radiator. But, you can do this job conveniently with the help of a simple garden hose. Continue reading to know about how to flush cooling system with garden hose.

How To Flush Cooling System With Garden Hose

Necessary Equipment

  • Antifreeze or coolant
  • Garden hose
  • Drain buckets
  • Products used in radiator flushing
  • Tester for checking antifreeze level
  • Old rags
  • Knife
  • Gloves
  • Goggles

How To Flush Cooling System With Garden Hose?

Before starting the main part place your vehicle on a higher spot. Now, you can flush the radiator in two major ways. The first one is the regular process that most people do. Another one is the backflow radiator process. Both of the processes have their pros and cons. Let’s see how the processes work.

Regular Coolant System Flushing Process

Here are the necessary steps that you need to follow in this process.

Step-1: First of all, check for the radiator-filling cap and open it. Some vehicles come with an expansion tank as well. You need to open that too.

Step-2: Locate the petcock or radiator drain valve. Place your drain bucket underneath the petcock. Otherwise, you won’t be able to receive the waste coolant.

Step-3: You need to find the drain plug and open it. As a result, the radiator will be drained and the bucket will receive all of the liquids. When empty, the drain should be closed.

Step-4: Now, it’s time to add the treatment of radiator flushing in the top radiator cap. You need to use the garden hose to get the job done. Continue your filling until the treatment or therapy is below the neck of the radiator. Don’t forget to check the instruction manual of the treating chemical.

Step-5: When flushing is done, you must close both of the caps including the expansion tank’s pressure cap.

Start-6: At this point, it’s time to get the engine started. You should keep it running for some time. Now, you need to turn on the heater. It will make the thermostat open. Now, you need to make the water and flushing therapy flow in the system.

Start-7: Continue the engine for 10 minutes and then stop it. Make your engine cool in a proper way.

Start-8: You should make the radiator drain plug and pressure caps open again. Check if the bucket is properly placed. Receive the flushing water into that bucket. Now, you should remove the radiator hose from both the top and bottom portions.

Step-9: At this moment, you should place the garden hose in the top radiator hole. To seal it properly, you can use rags.

Step-10: In this step, use tap water to rinse the radiator properly so that all dirt comes out.

Step-11: It’s time for adding the coolant to the valve which was diluted previously. You can also go for a coolant and distilled water mixture to get the job done.

Step-12: start the engine and run it. When you don’t see bubbles anymore and the coolant level rises, you should stop the engine. Now, you should make a replacement in the radiator screw-on cap.

Step-13: If you are not satisfied with the level, you can always add some extra liquid into the expansion tank.

Using The Back Flushing Method

If your cooling channel or the thermostat spots have hard-to-remove sediments, this is the right method for you. To do the job, you should get the perfect backflush kits from the market. In this method, you need to follow these steps-

Step-1: At the beginning, you must cool down the engine and also make it de-pressurized.

Step-2: The heater inlet hose needs to be cut. You can use a utility knife here. In the kits, you will find hose clamps. Clip them correctly to the core of the heater and top of the engine.

Step-3: Take the T-fitting of the right size from your kit and fit it. Now, you should make the hose clamps properly tighten. A screwdriver can be a great help for you in this case.

Step-4: There is a black side in the backflow prevention. Connect it to your T-fitting. Don’t forget to connect the garden hose with the coupling as well. You should make the connection in the yellow end of the coupling. You must be careful to protect your garden hose from any moving parts.

Step-5: At this point, you should connect the tube. It can be the splash or any other tube made of plastic. It will assist in removing water from the vehicle. You can use the drain bucket here to receive the wastewater.

Step-6: Now, run the engine and turn on the heater. The water should be able to flow freely throughout the system.

Step-7: When water removes properly, you must turn off the engine. The plastics and the hose must be disconnected now. Make sure that all of the water has been properly drained. You should use the drain valve for this purpose. Close the valve after getting the job done.

Step-8: It is time to change the coolant by adding the premix. It should get a maximum level of reach in the expansion chamber of your vehicle.

Final Words

Making the cooling system of your favorite vehicle is extremely important. Otherwise, you will never get the expected level of efficiency from the engine. Besides, engine overheating has many bad effects on overall engine performance. In this article, I tried to tell you everything about how to flush cooling system with garden hose. I hope now you can do it conveniently. However, don’t forget to follow every step correctly.

About Lynne Sadowski

I have been working as a sales man in a hose pipe shop for the last few years. During this time I have gained enough knowledge about hose pipes which I have tried to highlight on this site. Hopefully I can solve all your problems with hose pipe as well as suggest the best product.